U2626 Code - Reductant Control Module Lost Communication With Engine Control Module On Powertrain Sensor CAN Bus
Quick Answer
Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Engine Control Module (ECM), Engine Control Module harness is open or shorted, Engine Control Module circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- U2626 indicates Reductant Control Module Lost Communication With Engine Control Module On Powertrain Sensor CAN Bus.
- Common causes
- Common causes include Faulty Engine Control Module (ECM), Engine Control Module harness is open or shorted, Engine Control Module circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code U2626 Description
The Diagnostic Trouble Code (DTC) will set when a supervised periodic message that includes the transmitter device availability has not been received.
What are the Possible Causes of the DTC U2626?
- Faulty Engine Control Module (ECM)
- Engine Control Module harness is open or shorted
- Engine Control Module circuit poor electrical connection
- Faulty Reductant Control Module
How to Fix the DTC U2626?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the U2626 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the U2626 code?
Need more information on how to fix the U2626 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the U2626 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- U2626 Buick — Reductant Control Module Lost Communication With Engine Control Module On Powertrain Sensor CAN Bus
- U2626 Cadillac — Reductant Control Module Lost Communication With Engine Control Module On Powertrain Sensor CAN Bus
- U2626 Chevrolet — Reductant Control Module Lost Communication With Engine Control Module On Powertrain Sensor CAN Bus
- U2626 GMC — Reductant Control Module Lost Communication With Engine Control Module On Powertrain Sensor CAN Bus
Frequently Asked Questions about U2626 Code
1. What are the common symptoms of OBDII code U2626?
- Common symptoms include the Check Engine light illuminating, reduced engine performance, and potential issues with the reductant system.
2. What does the OBDII code U2626 indicate?
- This code indicates that there is a communication problem between the reductant control module and the engine control module on the powertrain sensor CAN bus.
3. What are the possible causes of code U2626?
- Possible causes include wiring issues, faulty control modules, poor connections, software glitches, or a malfunction in the CAN bus communication system.
4. How can I diagnose the U2626 code?
- Diagnosing this code typically involves using a professional OBDII scanner to retrieve the fault codes, checking the wiring and connections between modules, and performing a thorough system inspection.
5. What are some repair tips for resolving the U2626 code?
- Repair tips may include checking and repairing any damaged wiring, ensuring proper connections, updating software if necessary, and replacing faulty control modules if identified.
6. Can I continue driving with the U2626 code present?
- It is not recommended to continue driving with this code present, as it can lead to potential issues with engine performance and emissions control.
7. How serious is the U2626 fault code?
- While the severity of this code may vary, it is important to address it promptly to prevent any potential damage to the vehicle's systems and ensure proper emission control.
8. Will resetting the fault codes make the U2626 code disappear?
- Resetting the fault codes may temporarily clear the Check Engine light, but if the underlying issue is not resolved, the U2626 code is likely to reappear.
9. Can a DIY enthusiast fix the U2626 code at home?
- Depending on the cause of the code, some DIY enthusiasts may be able to address it at home by following proper diagnostic procedures and repair steps. However, complex issues may require professional assistance.
10. How much can I expect to pay to repair the U2626 code at a dealership or repair shop?
- Repair costs for the U2626 code can vary depending on the specific cause of the issue, but they may range from a couple of hundred dollars to over a thousand dollars, including parts and labor.
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