Articles on Technology, Health, and Travel

Hewitt tech of Technology

Hewitt Technologies Inc., Lexington, South Carolina.

Hewitt-TechInstall Accessories. Wire, Wire Loom, Tape, Wire Splices and Connectors! All the installation accessories you need to complete your bypass kit installation or other electronic installation project. Have a shop and looking for something in particular? Let us know and we may carry it for you. Showing the single result.Scan Tools - Hewitt-Tech. Home / Scan Tools. Scan Tools. A selection of very useful OBDII scan tools. From the generic i800 to the CR Pro these tools offer a range of functionality at a fraction of the cost of most other scanners of this quality. For just reading generic codes on any vehicles the i800 is a good low cost option.Gen 2: 3 Valve Secondary Air Injection System Bypass Kit (Partially Plug & Play) Rated 5.00 out of 5. $ 450.00 $ 405.00 Select options. Sale!www.Hewitt-Tech.com Rev.2 Installation Instructions Exhaust Block-Off Plates Toyota 4.7L (2UZ-FE) Engines Tools Needed: 10 mm combination wrench, ratchet with 10 mm standard and or deep-well socket, large flat head screwdriver or pry tool, PB Blaster or equivalent penetrating fluid ...ONLY available from Hewitt Technologies home of The Original SAIS Bypass Modules. 10′ Piece of Violet 20 AWG TXL wire with female disconnect terminal. 3M™ Automotive Acrylic Double-Sided Tape for mounting; Assembled 100% by hand in the USA! Limited Life-Time Warranty; MORE ABOUT THE SAIS BYPASS KITScan Tools - OBDII scan tools offering a range of functionality at a fraction of the cost.; iCarsoft i905 - Recommended; iCarsoft JP V2.0 - Advanced (Toyota/Lexus) iCarsoft CR Pro - Advanced (Multi-Brand) iCarsoft i800 - BasicONLY available from Hewitt Technologies home of The Original SAIS Bypass Modules. 10′ Piece of Violet 20 AWG TXL wire with female disconnect terminal. 3M™ Automotive Acrylic Double-Sided Tape for mounting; Assembled 100% by hand in the USA! Limited Life-Time Warranty; MORE ABOUT THE SAIS BYPASS KITThis typically means you will need a kit addon from Hewitt Tech in order to clear SAIS codes that are still present. DISCLAIMER: It is illegal to remove, dismantle or otherwise cause to be inoperative any pollution control device required by federal, state, or local emissions law. Our bypass kits are sold for off-road, competition or other ...The block off plates are the only way to isolate the secondary air injection system and the related pressure sensor (s) from the exhaust which should only be used with “The Original” SAIS Bypass Kit. By completely isolating the system from the exhaust, the pressure sensors are prevented from causing valve stuck open trouble codes which are ...The Gen 2 (Plug & Play) Bypass is Hewitt Technologies most recommended solution because of its ease of installation and offers the most comprehensive SAIS code coverage. Gen 2 (3 Valve) Compatibility: Select Toyota and Lexus vehicles model years '05 - '09. The 3 Valve version of the Gen 2 Bypass kit is for specific vehicles with 4.7L engines.Finding the perfect gift for the men in your life can often be a daunting task. However, if they have an interest in technology, you’re in luck. Tech gadgets are always a hit when ...Scan Tools - Hewitt-Tech. Home / Scan Tools. Scan Tools. A selection of very useful OBDII scan tools. From the generic i800 to the CR Pro these tools offer a range of functionality at a fraction of the cost of most other scanners of this quality. For just reading generic codes on any vehicles the i800 is a good low cost option.Description. SAIS PUMP PROXY PACK The SAIS Pump Proxy Pack is an Add-On to our popular SAIS Bypass Kits. Normally our SAIS Bypass Kits can't clear a P0418 or P0419 but now they can with the additional installation of a Pump Proxy Pack. The other option for clearing a P0418/P0419 code after installing a SAIS Bypass kit is to replace the SAIS ...Hewitt Tech said it may be a result of not installing the block off plates but could also be from a faulty MAF or dirty throttle body. I've already tried cleaning the MAF but that didn't work. This is all starting to get really frustrating. Another guy on a Tundra Facebook forum is dealing with the same issue and he has the Hewitt bypass kit.Gen 1 & Gen 2-3V: Pressure Sensor Replacement Wired. $ 215.00. Low Inventory – Call for Availability. Cure Pressure Sensor damage without removing the intake. A factory Pressure Sensor with a pigtail connector. Best suited replacing a faulty pressure sensor on the 4.7L vehicles with only one pressure sensor. Only Compatible with Gen 1 and Gen ...Welcome to the http://www.Hewitt-Tech.com YouTube channel. The videos here will help you understand and install our Secondary Air Injection System Bypass Kit...The CR Pro can do it all – Reads/clears trouble codes on all systems: engine, transmission, ABS, etc. Supports OBDII/EOBD ten modes. Full ECU diagnosis. Print data function allows printouts of diagnostic data recorded by tool or customized test reports. Out of stock. SKU: 653718178501 Categories: All Products, Scan Tools Tag: Scan Tools.Welcome to the http://www.Hewitt-Tech.com YouTube channel. The videos here will help you understand and install our Secondary Air Injection System Bypass Kit...Uses lower-body strength to anchor inside. Plays with leverage at the point of attack whether inside or outside. Keeps eyes in the backfield when inside; moves linemen to either side with strong hands. Has a good feel for the game with the anticipation and instincts to survive despite average at best size for an NFL defensive end.Scan Tools – OBDII scan tools offering a range of functionality at a fraction of the cost.; iCarsoft i905 – Recommended; iCarsoft JP V2.0 – Advanced (Toyota/Lexus) ...iCarsoft JP V2.0 for Toyota/Lexus and other Japanese Brands. $ 185.00. The iCarsoft JP V2.0 is a multisystem scan tool for Japanese Brands including Toyota (Lexus), Mazda, Nissan (Infiniti) and more. It can read/clear diagnostic trouble codes not only from the engine system but also from others, including ABS, SRS, Transmission on your [email protected] or Toll Free1-844-307-7671 12) Secure the harness as needed with zip-ties and reinstall the engine cover. You can now remove the secondary air pump and the air tubes. Likewise, if a pressure sensor option was utilized the air switching valves can also beScan Tools – OBDII scan tools offering a range of functionality at a fraction of the cost.; iCarsoft i905 – Recommended; iCarsoft JP V2.0 – Advanced (Toyota/Lexus) ...May 2013 - Apr 2022 9 years. Panama City, Panama. Supporting initiatives to strengthen forest governance throughout Central and South America; Managing grant facility for FLEGT-related activities ...Please note that Hewitt Tech Kit Addons are not stand alone solutions and must be used in combination with Bypass Kits. Showing all 10 results. Gen 2: Pressure Sensor Replacement Single. Rated 5.00 out of 5 $ 225.00 Select options; Gen 1 & Gen 2-3V: Pressure Sensor Replacement Wired ...Install Accessories. Wire, Wire Loom, Tape, Wire Splices and Connectors! All the installation accessories you need to complete your bypass kit installation or other electronic installation project. Have a shop and looking for something in particular? Let us know and we may carry it for you. Showing the single result.Hey guys! In this video we take you through the installation of the Hewitt Technologies Secondary Air Injection System Bypass Kit.This is a HUGE savings over...In today’s digital age, technology plays a crucial role in the success of nonprofit organizations. From fundraising to volunteer management, there are numerous tech tools available...Jan 24, 2024 · Fast free shipping, nice packaging and high quality product. Super detailed and easy to follow instructions. Highly recommended! Spend money and time once. Hewitt Technologies Inc., Lexington, South Carolina. 1,165 likes · 1 talking about this. Circuit, PCB, harnesses, and new product development and...Product Design. Headquarters Regions East Coast, Southern US. Founded Date 2012. Operating Status Active. Legal Name Hewitt Technologies Inc. Company Type For Profit. Contact Email [email protected]. Phone Number 844-307-7671.Hewitt compiled a record of 190-162 at Tech, and his overall record as a head coach is 256-189, with eight post-season appearances in 14 years. Hewitt expanded his experience by twice serving as an assistant coach for USA Basketball [apos]s Under-18 team at the FIBA Americas U18 Championship, helping the U.S. win a gold medal each time.Bio. College: 2021: GLIAC All-Academic Team...Squad member... 2020: Season Cancelled (Covid19)...2019: Redshirted... High School: Prepped at Westwood High School… 2018 All-UP Dream Team Offensive Tackle… 2017 All-UP Dream Team Defensive Tackle… 2017 All-Conference Offensive and Defensive Tackle… 2018 All-Conference Offensive …Gen 1: Air Switching Valve Proxy. Made to Order Combination of our Valve Replacement Pack and Pressure Sensor Replacement. This Kit Addon will resolve Air Switching Valve electrical codes P0412 / P0415 and codes related to a damaged pressures sensor. This product is currently out of stock and [email protected] or Toll Free1-844-307-7671 Hewitt Technologies Inc. – Hewitt-Tech.com Gen-II Secondary Air Injection System (SAIS) Bypass Kit 4.6L GX460 Installation Instructions Introduction: A failure of any component of the SAIS will generally set the check engine light (CEL) and cause the EnginePressure Sensor Replacement Single is to be used in place of air switching valves or damaged pressure sensors. These are used only with the Gen 1 Bypass kits and is not compatible with the Gen 2 Bypass Kits. Not a stand along product, must be used with Bypass Kit.Product Design. Headquarters Regions East Coast, Southern US. Founded Date 2012. Operating Status Active. Legal Name Hewitt Technologies Inc. Company Type For Profit. Contact Email [email protected]. Phone Number 844-307-7671.Gen 1: Secondary Air Injection System Bypass Kit (Plug & Play) Rated 5.00 out of 5. $ 190.00 $ 155.00 Select options.Department of Chemical Engineering and Chemical Technology, Imperial College of Sciences and Technology, London, England ... G. F. Hewitt Centre d’Etudes Nucléaires de Grenoble, Service des Transferts Thermiques, Grenoble, France J. M. Delhaye Division of Reactor Safety Research, U.S. Nuclear Regulatory Commission, USA ...Scan Tools – OBDII scan tools offering a range of functionality at a fraction of the cost.; iCarsoft i905 – Recommended; iCarsoft JP V2.0 – Advanced (Toyota/Lexus) iCarsoft CR Pro – Advanced (Multi-Brand) iCarsoft i800 – BasicHewitt Tech is here to help. Disclaimer. Hewitt Tech's SAIS bypass kits and products are sold for off-road, competition, or other emissions-exempt vehicles only. It is illegal to remove, dismantle, or otherwise cause to be inoperative any pollution control device required by federal, state, or local emissions law.Home / Kit Addons / Gen 1 / Gen 1: Pressure Sensor Jumper. Gen 1: Pressure Sensor Jumper. $ 75.00. The Pressure Sensor Jumper is the most cost effective option to address a damaged Pressure Sensor. No need to repair or replace the expensive air switching valve. Not stand along product, must be used with Bypass Kit. [email protected] or Toll Free1-844-307-7671 Hewitt Technologies Inc. The Hewitt-Tech Secondary Air Injection System Bypass Kit V5446H – 4.6L Installation Instructions Introduction: The Secondary Air Injection System (SAIS) bypass module is used to prevent the operation of the SAIS that isThe bypass module is activated when the ignition is first switched to “ON” and any time it detects a 4-12V signal on the starter relay wire. The starter relay wire is only available from Hewitt Technologies home of the Original SAIS Bypass Modules! When connected, ensures that the module actively prevents the SAIS from running on EVERY start. The bypass module is activated when the ignition is I've been involved in everything from s[email protected] or Toll Free1-844-307-767

Health Tips for Body shape visualizer

The Hewitt Tech (HT) Gen 1 Secondary Air Injection System B.

Scan Tools – OBDII scan tools offering a range of functionality at a fraction of the cost.; iCarsoft i905 – Recommended; iCarsoft JP V2.0 – Advanced (Toyota/Lexus) iCarsoft CR Pro – Advanced (Multi-Brand) iCarsoft i800 – BasicThe Hewitt-Tech Secondary Air Injection System Bypass Kit V5447H-4.7L Installation Instructions Introduction: The Secondary Air Injection System (SAIS) bypass module is used to prevent the operation of the SAIS that is found on Toyota/Lexus vehicles. By preventing the operation of the SAIS the trouble codes related to mechanicalI ordered the Hewtitt- Tech Plug and Play Bypass Kit, and installed it a week ago. Cleared the codes and everything went good for a week, now I'm getting the CEL / Trac-Off lights again with the codes P0101- Mass or Volume Air Flow Circuit Range/Performance Problem, P0172-System too Rich Bank 1 & P0175-System too Rich …Welcome to the http://www.Hewitt-Tech.com YouTube channel. The videos here will help you understand and install our Secondary Air Injection System Bypass Kit...Install Accessories. Wire, Wire Loom, Tape, Wire Splices and Connectors! All the installation accessories you need to complete your bypass kit installation or other electronic installation project. Have a shop and looking for something in particular? Let us know and we may carry it for you. Showing the single result.Hewitt Technologies Inc Web www.hewitt-tech.com Phone 844-307-7671 Home of the Original & Most Trusted SAIS Bypass Kit. Save Share. Like. Sort by Oldest first Oldest first Newest first Most reactions. hewitt-tech Discussion starterPressure Sensor Replacement Single is to be used in place of air switching valves or damaged pressure sensors. These are used only with the Gen 1 Bypass kits and is not compatible with the Gen 2 Bypass Kits. Not a stand along product, must be used with Bypass Kit.Welcome to the http://www.Hewitt-Tech.com YouTube channel. The videos here will help you understand and install our Secondary Air Injection System Bypass Kits that we offer for [email protected] or Toll Free1-844-307-7671 Hewitt Technologies Inc. The Hewitt-Tech Secondary Air Injection System Bypass Kit V5440H - 4.0L Installation Instructions Introduction: The Secondary Air Injection System (SAIS) bypass module is used to prevent the operation of the SAIS that isScan Tools - OBDII scan tools offering a range of functionality at a fraction of the cost.; iCarsoft i905 - [email protected] or Toll Free1-844-307-7671 . Hewitt Technologies Inc. - Hewitt-Tech.com . Pressure Sensor Option (PSO) for the Gen-II (SAIS) Bypass Kit . Installation Instructions - Rev. 1 . Figure 1 - Pressure Sensor Option (PSO) - Purchased Separately .Verbivka ( Ukrainian: Вербівка) is a village in Kalush Raion in Ivano-Frankivsk Oblast ( province) of western Ukraine, founded in 1674. It belongs to Rozhniativ settlement hromada, one of the hromadas of Ukraine. [1] The first name of the village is Ldziany. A local monument is the wooden church of the Cathedral of the Blessed Virgin ...Hewitt Tech is the Home of the Original Secondary Air Injection System (SAIS) Bypass Kits for Toyota & Lexus vehicles. These kits offer a cost effective solution for the failure prone SAIS found on certain Toyota & Lexus trucks and SUVs. The bypass kit and kit addons can prevent many of the trouble codes caused by mechanical or electrical failure.www.Hewitt-Tech.com Rev.2 Installation Instructions Exhaust Block-Off Plates Toyota 4.7L (2UZ-FE) Engines Tools Needed: 10 mm combination wrench, ratchet with 10 mm standard and or deep-well socket, large flat ... Paul Hewitt, Hewitt Technologies Inc. Subject: SAIS Bypass Kit Block Off Plate Installation Instructions 4.7LGen 1 & Gen 2-3V: Pressure Sensor Replacement Wired. $ 215.00. Low Inventory – Call for Availability. Cure Pressure Sensor damage without removing the intake. A factory Pressure Sensor with a pigtail connector. Best suited replacing a faulty pressure sensor on the 4.7L vehicles with only one pressure sensor. Only Compatible with Gen 1 and Gen ...Hewitt Broth is prepared according to the formula described by Updyke and Nickle, who compared media for type specific extract production of group A streptococci. This study was performed using Todd Hewitt Broth prepared with infusion of fresh beef heart as a control. Results showed Todd Hewitt Broth wasAssociate Professor. Chair, Visual Arts Minor. James R. Jewitt specializes in the art and architecture of early modern Europe, with a focus on collecting and display practices in Renaissance and 17th-century Italy and France. His articles on the artists Titian, Dosso Dossi, and Nicolas Poussin, among others, have appeared in venues such as The ...The block off plates are the only way to isolate the secondary air injection system and the related pressure sensor (s) from the exhaust which should only be used with “The Original” SAIS Bypass Kit. By completely isolating the system from the exhaust, the pressure sensors are prevented from causing valve stuck open trouble codes which are ...Description. SAIS PUMP PROXY PACK The SAIS Pump Proxy Pack is an Add-On to our popular SAIS Bypass Kits. Normally our SAIS Bypass Kits can’t clear a P0418 or P0419 but now they can with the additional installation of a Pump Proxy Pack. The other option for clearing a P0418/P0419 code after installing a SAIS Bypass kit is to replace the SAIS ...GEN 2: Fully Plug & Play – All 5.7L, 4.6L, 4.0L and 2.7L Vehicles; 07-09 Tundra & 08-09 Sequoia 4.7L; GEN 2-3V: Partially Plug & Play – All 4.7L Vehicles Except 07-09 Tundra & 08-09 Sequoia; GEN 2 – Kit Addons; GEN 1 SAIS BYPASS KIT – Original & Basic SolutionThe block off plates are the only way to isolate the secondary air injection system and the related pressure sensor (s) from the exhaust which should only be used with “The Original” SAIS Bypass Kit. By completely isolating the system from the exhaust, the pressure sensors are prevented from causing valve stuck open trouble codes which are ...Verbivka ( Ukrainian: Вербівка) is a village in Kalush Raion in Ivano-Frankivsk Oblast ( province) of western Ukraine, founded in 1674. It belongs to Rozhniativ settlement hromada, one of the hromadas of Ukraine. [1] The first name of the village is Ldziany. A local monument is the wooden church of the Cathedral of the Blessed Virgin ...The bypass module is activated when the ignition is first switched to “ON” and any time it detects a 4-12V signal on the starter relay wire. The starter relay wire is only available from Hewitt Technologies home of the Original SAIS Bypass Modules! When connected, ensures that the module actively prevents the SAIS from running on EVERY start.The P0441 (Incorrect Purge Flow) is an EVAP system problem, the P2443 (Air Switching Valve Bank 2 Stuck Closed)is a problem with the Secondary Air Injection System. Unless the other code was actually a P2441 (Air Switching Valve Bank 1 Stuck Closed) they are 2 different systems. Secondary Air Injection Problems are quite common on 2012 V6 ...In today’s fast-paced digital world, staying productive is crucial for success. Thankfully, there are a plethora of tech tools available that can help you streamline your workflow ...Tax season can often be a stressful time for individua33% Off Hewitt Technologies Secondary Air Bypass Kit

Top Travel Destinations in 2024

Top Travel Destinations - Gen 2: Pressure Sensor Replacement Single. Rated 5.00 o

Hewitt Install Guide For LIft Tech marine Direct Drive MOtors Uses the Most Commen Kit Part Number – Kit MC Smoke: SmokeHewitt-TechPressure Sensor Replacement Double is to be used in place of air switching valves or damaged pressure sensors. These are used only with the Gen 1 Bypass kits and is not compatible with the Gen 2 Bypass Kits. Not a stand …[email protected] or Toll Free1-844-307-7671 7) Route the harness from the Gen-II unit to the bank 1 and bank 2 air switching valves. The first set of connectors will go to the driver side ASV and the 2 connectors on theWe would like to show you a description here but the site won't allow [email protected] or Toll Free1-844-307-7671 Hewitt Technologies Inc. - Hewitt-Tech.com Gen-II Secondary Air Injection System (SAIS) Bypass Kit 4.6L GX460 Installation Instructions Introduction: A failure of any component of the SAIS will generally set the check engine light (CEL) and cause the EngineOur Location. Address: Hewitt Technologies Inc. 1356 N Lake Dr., Suite D. Lexington, SC, 29072. Contact Number: Toll Free 1-844-307-7671. Hewitt is here to help! Contact Us for Secondary Air Injections System Bypass kits for Toyota/Lexus Trucks and SUVs. You could save up to $4000 on repairs!Tax season can be a stressful time for many individuals and businesses alike. With complex tax laws and ever-changing regulations, it’s no wonder that people often feel overwhelmed...Find support and customer service options to help with your HP products including the latest drivers and troubleshooting articles.Glassdoor gives you an inside look at what it's like to work at Hewitt Technologies, including salaries, reviews, office photos, and more. This is the Hewitt Technologies company profile. All content is posted anonymously by employees working at Hewitt Technologies. See what employees say it's like to work at Hewitt Technologies.Gen 1: Pressure Sensor Replacement Single. $ 240.00. Low Inventory – Call for Availability. Pressure Sensor Replacement Single is to be used in place of air switching valves or damaged pressure sensors. These are used only with the Gen 1 Bypass kits and is not compatible with the Gen 2 Bypass Kits. Not a stand along product, must be used with ...Scan Tools – OBDII scan tools offering a range of functionality at a fraction of the cost.; iCarsoft i905 – Recommended; iCarsoft JP V2.0 – Advanced (Toyota/Lexus) iCarsoft CR Pro – Advanced (Multi-Brand) iCarsoft i800 – BasicHewitt-Tech.com and the advertisers each reserve the right to limit the provision of their products or services to any person, geographic area, or jurisdiction they so desire and to limit the quantities of any products or services that they provide. Any offer for any product or service made in the materials on this Web site is void where ...Pressure Sensor Replacement Single is to be used in place of air switching valves or damaged pressure sensors. These are used only with the Gen 1 Bypass kits and is not compatible with the Gen 2 Bypass Kits. Not a stand along product, must be used with Bypass Kit.The Gen 2 is our most comprehensive bypass kit and for this reason is our recommended solution. It emulates the operation of the SAIS by replacing the Air Injection Drivers (AID). It enables you to clear the Check Engine Light, Limp Mode and error codes related to mechanical and electrical SAIS faults.Glassdoor gives you an inside look at what it's like to work at Hewitt Technologies, including salaries, reviews, office photos, and more. This is the Hewitt Technologies company profile. All content is posted anonymously by employees working at Hewitt Technologies. See what employees say it's like to work at Hewitt Technologies.Gen 2: 3 Valve Secondary Air Injection System Bypass Kit (Partially Plug & Play) Rated 5.00 out of 5. $ 450.00 $ 405.00 Select options. Sale!Scan Tools – OBDII scan tools offering a range of functionality at a fraction of the cost.; iCarsoft i905 – Recommended; iCarsoft JP V2.0 – Advanced (Toyota/Lexus) ...Hewitt Tech is the Home of the Original Secondary Air Injection System (SAIS) Bypass Kits for Toyota & Lexus vehicles. These kits offer a cost effective solution for the failure prone SAIS found on certain Toyota & Lexus trucks and SUVs. The bypass kit and kit addons can prevent many of the trouble codes caused by mechanical or electrical failure.Getting admitted into a government college for a B Tech degree can be a daunting task. With the increasing competition, it is important to know the right steps to take in order to ...Department of Chemical Engineering and Chemical Technology, Imperial College of Sciences and Technology, London, England ... G. F. Hewitt Centre d’Etudes Nucléaires de Grenoble, Service des Transferts Thermiques, Grenoble, France J. M. Delhaye Division of Reactor Safety Research, U.S. Nuclear Regulatory Commission, USA ...Associate Professor. Chair, Visual Arts Minor. James R. Jewitt specializes in the art and architecture of early modern Europe, with a focus on collecting and display practices in Renaissance and 17th-century Italy and France. His articles on the artists Titian, Dosso Dossi, and Nicolas Poussin, among others, have appeared in venues such as The ...This video covers the installation of the https://hewitt-tech.com exhaust block off plates for all of our Secondary Air Injection System Bypass Kits. These a...Nokia LTPP, 1/2019 Page 1 Introduction Nokia’s benefit programs can be an important part of your financial security. Your benefit under the Lucent Technologies Inc. Pension Plan (the “Pension Plan” or the “Plan”), whenProduct Design. Headquarters Regions East Coast, Southern US. Founded Date 2012. Operating Status Active. Legal Name Hewitt Technologies Inc. Company Type For Profit. Contact Email [email protected]. Phone Number 844-307-7671.Hewitt Tech is the Home of the Original Secondary Air Injection System (SAIS) Bypass Kits for Toyota & Lexus vehicles. These kits offer a cost effective solution for the failure prone SAIS found on certain Toyota & Lexus trucks and SUVs. The bypass kit and kit addons can prevent many of the trouble codes caused by mechanical or electrical failure.Jan 21, 2020 · Hewitt tech will save you thousands. In this video my toyota tundra gets somewhat deleted! Hewitt Tech has made it simple and cheap to fix expensive problems. Hewitt tech will save you thousands. 33% Off Hewitt Technologies Secondary Air Bypass Kit Co