U2631 Code - Reductant Control Module Lost Communication With Reductant Pressure Sensor
Quick Answer
Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Reductant Pressure Sensor, Reductant Pressure Sensor harness is open or shorted, Reductant Pressure Sensor 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
- U2631 indicates Reductant Control Module Lost Communication With Reductant Pressure Sensor.
- Common causes
- Common causes include Faulty Reductant Pressure Sensor, Reductant Pressure Sensor harness is open or shorted, Reductant Pressure Sensor 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 U2631 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 U2631?
- Faulty Reductant Pressure Sensor
- Reductant Pressure Sensor harness is open or shorted
- Reductant Pressure Sensor circuit poor electrical connection
- Faulty Reductant Control Module
How to Fix the DTC U2631?
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 U2631 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 U2631 code?
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Need Help with the Code?
Get the U2631 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- U2631 Buick — Reductant Control Module Lost Communication With Reductant Pressure Sensor
- U2631 Cadillac — Reductant Control Module Lost Communication With Reductant Pressure Sensor
- U2631 Chevrolet — Reductant Control Module Lost Communication With Reductant Pressure Sensor
- U2631 GMC — Reductant Control Module Lost Communication With Reductant Pressure Sensor
Frequently Asked Questions about U2631 Code
1. What are the common symptoms of OBDII code U2631?
The common symptoms of code U2631 include the Check Engine light coming on, poor engine performance, and potential issues with the exhaust system.
2. What does the OBDII code U2631 mean?
OBDII code U2631 indicates that the Reductant Control Module has lost communication with the Reductant Pressure Sensor, which is typically part of the emissions control system.
3. What are the possible causes of code U2631?
Possible causes of code U2631 include a faulty Reductant Pressure Sensor, wiring or connection issues between the sensor and the control module, or a malfunction in the control module itself.
4. How can I diagnose the cause of code U2631?
Diagnosing code U2631 usually involves using a diagnostic scanner to read the code, checking the connections and wiring between the sensor and control module, and testing the sensor itself for proper function.
5. Can I drive my vehicle with OBDII code U2631?
It is not recommended to drive your vehicle with unresolved code U2631, as it can affect the emissions control system and potentially lead to more serious engine problems if left unaddressed.
6. How can I repair OBDII code U2631?
Repairing code U2631 may involve replacing the Reductant Pressure Sensor, repairing any damaged wiring or connections, or reprogramming the control module to restore communication with the sensor.
7. Is OBDII code U2631 a common issue in vehicles?
Code U2631 is not as common as some other OBDII codes, but it can occur in vehicles equipped with emissions control systems that use a Reductant Control Module and Pressure Sensor.
8. Can a DIY enthusiast fix OBDII code U2631?
Depending on the skill level and tools available, a DIY enthusiast may be able to diagnose and repair code U2631, especially if it involves simple tasks like checking connections or replacing a sensor.
9. How much does it cost to repair OBDII code U2631 at a repair shop?
The cost of repairing code U2631 at a repair shop can vary depending on the specific cause of the issue, but it may involve parts and labor costs ranging from $100 to $500 or more.
10. Will resetting the OBDII code U2631 make it go away permanently?
Resetting the code may temporarily turn off the Check Engine light, but if the underlying issue causing code U2631 is not addressed, the code is likely to reappear. It's important to diagnose and repair the root cause of the problem for a permanent solution.
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