U2629 Chevrolet Code - Reductant Control Module Lost Communication With Reductant Tank Temperature Sensor 1
Quick Answer
Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Reductant Tank Temperature Sensor 1, Reductant Tank Temperature Sensor 1 harness is open or shorted, Reductant Tank Temperature Sensor 1 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
- U2629 Chevrolet indicates Reductant Control Module Lost Communication With Reductant Tank Temperature Sensor 1.
- Common causes
- Common causes include Faulty Reductant Tank Temperature Sensor 1, Reductant Tank Temperature Sensor 1 harness is open or shorted, Reductant Tank Temperature Sensor 1 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 U2629 Chevrolet 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 U2629 Chevrolet?
- Faulty Reductant Tank Temperature Sensor 1
- Reductant Tank Temperature Sensor 1 harness is open or shorted
- Reductant Tank Temperature Sensor 1 circuit poor electrical connection
- Faulty Reductant Control Module
How to Fix the DTC U2629 Chevrolet?
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 U2629 Chevrolet 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.
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Frequently Asked Questions about U2629 Chevrolet Code
1. What does the OBDII code U2629 mean on a Chevrolet?
The code U2629 indicates that the Reductant Control Module has lost communication with Reductant Tank Temperature Sensor 1, which monitors the temperature of the diesel exhaust fluid (DEF) tank.
2. What are the common symptoms of the U2629 code in a Chevrolet?
Symptoms may include a check engine light, DEF system warning messages, reduced engine power, or the vehicle entering a "limp mode."
3. What causes the U2629 code to be triggered?
Common causes include faulty wiring or connectors, a malfunctioning Reductant Tank Temperature Sensor, a failed Reductant Control Module, or software-related communication issues.
4. How do I diagnose the U2629 code on my Chevrolet?
Check for damaged or corroded wiring and connectors between the Reductant Control Module and the sensor. Use a scan tool to verify communication signals and test the sensor for proper functionality.
5. Can a bad DEF temperature sensor cause the U2629 code?
Yes, a malfunctioning DEF temperature sensor can disrupt communication with the Reductant Control Module and trigger the code.
6. Is it safe to drive with the U2629 code active?
Driving with this code active can lead to reduced engine performance or emissions compliance issues. It's best to address the problem promptly.
7. How much does it cost to repair the U2629 code on a Chevrolet?
The repair cost can vary, but replacing a DEF tank temperature sensor typically ranges from $150 to $400, depending on labor and parts.
8. Can I clear the U2629 code without fixing the issue?
Clearing the code without fixing the root cause will likely result in the code returning and may impact vehicle performance or emissions compliance.
9. Do I need to replace the Reductant Tank Temperature Sensor for the U2629 code?
Not always. The issue could be related to wiring, connectors, or the Reductant Control Module itself. Proper diagnostics are necessary to determine the exact cause.
10. Can software updates fix the U2629 code on a Chevrolet?
In some cases, a software update to the Reductant Control Module may resolve communication issues, but this depends on the specific vehicle and problem.
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