Lost Communication with Parking Assist Module
The U0159 code indicates a loss of communication between the engine control module (ECM) or gateway and the parking assist control module (PAM). This fault is triggered when the main module fails to receive validated serial messages from the parking assist module within a specified time, typically pointing to an issue on the CAN (Controller Area Network) bus.
1. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.
2. Most Common Causes
- Faulty parking assist control module (PAM)
- Open or shorted CAN bus wiring
- Poor connection or corroded terminals in the module harness
- Blown fuse or loss of power/ground to the parking assist module
- Vehicle network communication issue (gateway)
3. Symptoms You Will Notice
- Parking assist system inoperative or malfunction indicator on
- Possible other communication-related codes present
4. Step-by-Step Diagnosis
Check for blown fuses and verify power and ground at the parking assist module
Inspect CAN bus wiring for opens, shorts, or corrosion
Test the parking assist module for proper operation or replace if faulty
Check the gateway module for communication issues
5. Frequently Asked Questions
Is it safe to drive?▼
Yes, the vehicle is generally safe to drive as the parking assist system is not critical for operation. However, the system will be inoperative until repaired.
How much does it cost to fix?▼
Diagnosis and repair typically range from $100 to $400, depending on the root cause (e.g., wiring repair vs. module replacement).