U0132 Lost Communication with Ride Level Control Module
The U0132 code indicates a loss of communication on the Controller Area Network (CAN) bus with the Ride Level Control Module. This module manages the air or adaptive suspension system, including vehicle height adjustment, damping, and in some cases, headlight leveling. The fault is logged when the main control module (PCM, BCM, or gateway module) does not receive valid messages from the suspension level module for a set period, disrupting comfort and stability systems.
1. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.
2. Most Common Causes
- Faulty ride level control module
- Open or short circuit in the CAN bus wiring (high or low line)
- Corrosion, rust, or damage at module connectors
- Power or ground supply failure to the module
- Abnormal CAN bus resistance due to faulty adjacent modules
- Incomplete or failed module software update
3. Symptoms You Will Notice
- Suspension warning light on the dashboard
- Vehicle sitting unevenly or at incorrect ride height
- Suspension system inoperative or stuck in one mode
- Headlights not leveling properly (if equipped)
4. Step-by-Step Diagnosis
Scan for all stored codes and freeze frame data
Check for technical service bulletins (TSBs) related to U0132
Inspect the CAN bus wiring and connectors at the ride level module for damage or corrosion
Test module power and ground circuits with a multimeter
Measure CAN bus resistance and signal integrity with an oscilloscope
Attempt communication with the module using a professional scan tool; if no response, suspect module failure
5. Frequently Asked Questions
Is it safe to drive?▼
Driving is possible but not recommended for long distances. The suspension may not adjust properly, affecting ride comfort and stability, and headlight aim could be off. Have it diagnosed soon.
How much does it cost to fix?▼
Repair costs typically range from $200 to $1,200, depending on whether the issue is wiring ($200-$400), a module replacement ($500-$1,200 including labor), or a software update ($100-$200).