CAN network

U0132 — Lost Communication with Ride Level Control Module

Severity: medium Drive with care, to a shop

What U0132 means

U0132 means one or more control units stopped receiving messages from the ride level control module, which manages air suspension or ride height. Modules normally share data over a CAN bus, and this one is expected to report in regularly. If a wiring fault, poor power or ground, or a failed module breaks that link, height control stops working.

Symptoms

  • Suspension warning message or light
  • Vehicle sitting low
  • Ride leveling not working
  • Other warning lamps may come on
  • Functions handled by the module unavailable

Possible causes

  1. Failed air suspension control module
  2. CAN bus wiring fault (open, short, chafed harness)
  3. Compressor relay fault
  4. Connector or terminal corrosion
  5. Power supply or ground fault at the module
  6. Another faulty module loading down the bus

How to diagnose

  1. Run a full-module scan to see which modules communicate and which do not
  2. Read any other stored codes and freeze frame data
  3. Check CAN bus resistance and voltages at the diagnostic connector
  4. Inspect the module's wiring and connectors for chafing, moisture and corrosion
  5. Check fuses, power supply and grounds for the module
  6. Check the compressor relay and its power feed
  7. Disconnect suspect modules one at a time, only following a documented procedure

Common fixes

  • Repair the damaged CAN bus wiring
  • Clean or replace corroded connectors and terminals
  • Fix the module's power or ground fault
  • Replace the compressor relay
  • Replace and program the ride level control module if it has failed

Questions and answers

What does U0132 mean?

It means communication with the ride level control module was lost. Other modules are not getting its messages on the network, so ride height control does not work.

Can I drive with U0132?

Yes, but carefully and only a short distance. The car may sit very low, which can cause scraping and damage, and handling may suffer.

What most often causes U0132?

Most often it is a wiring or connector problem on the CAN bus, a power or ground fault at the module, or a failed module. Start with a full-module scan and a wiring inspection.

This is general information about the code. The meaning can differ between makes and models: a scan tool and the repair manual for your car will show the exact cause.