U2629 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 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 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?
- 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?
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 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 U2629 code?
Need more information on how to fix the U2629 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the U2629 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- U2629 Buick — Reductant Control Module Lost Communication With Reductant Tank Temperature Sensor 1
- U2629 Cadillac — Reductant Control Module Lost Communication With Reductant Tank Temperature Sensor 1
- U2629 Chevrolet — Reductant Control Module Lost Communication With Reductant Tank Temperature Sensor 1
- U2629 GMC — Reductant Control Module Lost Communication With Reductant Tank Temperature Sensor 1
Frequently Asked Questions about U2629 Code
1. What are the common symptoms of OBDII code U2629?
- The common symptoms include the check engine light coming on, decreased fuel efficiency, and potential issues with the vehicle's exhaust system.
2. What does the OBDII code U2629 indicate?
- This code indicates that there is a communication problem between the reductant control module and the reductant tank temperature sensor 1 in the vehicle's emissions system.
3. What are the possible causes of OBDII code U2629?
- Possible causes include a faulty reductant tank temperature sensor, damaged wiring or connectors, a malfunctioning reductant control module, or a communication error within the system.
4. How can I diagnose the issue related to OBDII code U2629?
- Diagnosis typically involves using a diagnostic scanner to retrieve the code, checking the wiring and connectors for any visible damage, and testing the reductant tank temperature sensor and control module for proper functionality.
5. Can I drive my vehicle with OBDII code U2629?
- It is generally not recommended to drive the vehicle with this code present, as it can lead to increased emissions and potential damage to the emissions system over time.
6. How can I repair OBDII code U2629?
- Repair may involve replacing the reductant tank temperature sensor, repairing or replacing damaged wiring or connectors, or reprogramming the reductant control module to establish proper communication.
7. Is it safe to ignore OBDII code U2629?
- Ignoring this code can lead to potential emissions issues and may cause the vehicle to fail an emissions test. It is best to address the underlying problem as soon as possible.
8. Can a DIY enthusiast fix OBDII code U2629?
- Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to diagnose and repair this code. However, it is recommended to consult a professional for accurate diagnosis and repair.
9. Are there any preventative maintenance tips to avoid OBDII code U2629?
- Regularly checking and maintaining the emissions system, including the reductant tank temperature sensor and related components, can help prevent issues that may trigger this code.
10. How long does it typically take to repair OBDII code U2629?
- The repair time can vary depending on the exact cause of the issue and the extent of the repairs needed. It is best to consult with a mechanic for a more accurate estimate of repair time.
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