U129D Code - Lost Communication With The Precision All Wheel Steer Control Unit
Quick Answer
The Controller Area Network (CAN) transmits/receives pulsing signals to/from the control modules simultaneously by using two signal lines (F-CAN_H and F-CAN_L). Common causes include Faulty Precision All-Wheel Steer Control Unit, Precision All-Wheel Steer Control Unit harness is open or shorted, Precision All-Wheel Steer Control Unit 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
- U129D indicates Lost Communication With The Precision All Wheel Steer Control Unit.
- Common causes
- Common causes include Faulty Precision All-Wheel Steer Control Unit, Precision All-Wheel Steer Control Unit harness is open or shorted, Precision All-Wheel Steer Control Unit 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 U129D Description
What are the Possible Causes of the DTC U129D?
- Faulty Precision All-Wheel Steer Control Unit
- Precision All-Wheel Steer Control Unit harness is open or shorted
- Precision All-Wheel Steer Control Unit circuit poor electrical connection
- Faulty Powertrain Control Module (PCM)
How to Fix the DTC U129D?
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 U129D 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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Information for Specific Makes
- U129D Acura — Lost Communication With The Precision All Wheel Steer Control Unit
- U129D Honda — Lost Communication With The Precision All Wheel Steer Control Unit
Frequently Asked Questions about U129D Code
1. What are the common symptoms of OBDII code U129D?
- Common symptoms include the ABS warning light, traction control warning light, and stability control warning light illuminating on the dashboard.
2. What does the OBDII code U129D mean?
- The code U129D indicates that there is a communication problem between the vehicle's onboard computer and the Precision All Wheel Steer Control Unit.
3. What are the possible causes of code U129D?
- The code U129D can be caused by a faulty control unit, damaged wiring or connectors, a software glitch, or a communication bus issue in the vehicle.
4. How can I diagnose the U129D code?
- Diagnosing the U129D code typically involves using a diagnostic scanner to retrieve the code, checking the wiring and connectors for damage, and testing the control unit for proper functionality.
5. Can driving with the U129D code present cause any harm to the vehicle?
- Driving with the U129D code present may affect the vehicle's stability control and all-wheel steering functionality, potentially compromising the vehicle's handling and safety.
6. How can I repair the U129D code?
- Repairing the U129D code may involve replacing the Precision All Wheel Steer Control Unit, repairing damaged wiring or connectors, updating software, or addressing any communication bus issues in the vehicle.
7. Is it safe to continue driving my vehicle with the U129D code?
- It is not recommended to drive the vehicle with the U129D code present, as it can impact the vehicle's stability and overall safety systems.
8. How much does it typically cost to repair the U129D code?
- The cost of repairing the U129D code can vary depending on the exact cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.
9. Can I reset the U129D code on my own?
- While you can attempt to clear the code using a diagnostic scanner, it is important to address the underlying issue causing the code to prevent it from reoccurring.
10. Is the U129D code common in specific vehicle makes or models?
- The U129D code is more commonly found in vehicles equipped with Precision All Wheel Steer systems, such as certain Acura and Honda models.
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