U0132: Lost Communication With Suspension Control Module A

What it means

A control module has stopped receiving expected messages from suspension control module A. Suspension functions managed by that module may be limited or unavailable.

At a glance

• Usually lights the warning light of the system that lost communication

How it works

Suspension Control Module A manages suspension functions assigned to that module and exchanges status with other controllers over the vehicle network. This code sets when expected messages from Module A are missing, which can leave its ride-height or suspension functions unavailable.

Common causes

Most likely first.

1. Suspension control module power or ground fault
2. Damaged network wiring or connector
3. Suspension control module failure
4. Low system voltage

Symptoms

• Suspension warning or message
• Ride-height or suspension functions may be unavailable
• Other communication codes

How to diagnose it

1. Save freeze-frame data and scan all modules for suspension and communication faults; identify whether Suspension Control Module A alone is unreachable.
2. Check battery and charging voltage, then inspect Module A’s fuses, power feed, and grounds using vehicle wiring information.
3. Inspect the Module A connector and accessible network wiring for corrosion, loose terminals, water intrusion, or damage.
4. Use a scan tool to check Module A communication and whether the gateway sees its network messages.
5. If power and ground are sound, test the relevant communication circuit to the manufacturer’s procedure and specification before replacing the module.

Common fixes

• Correct low battery or charging voltage if it is affecting module operation.
• Repair a blown fuse, poor ground, or damaged power feed to Suspension Control Module A.
• Repair a loose, corroded, or damaged module connector or network wire.
• Correct a verified gateway or network-routing issue.
• Replace Suspension Control Module A only after confirming its supply and communication circuit are sound.

Can I keep driving?

Ride height or suspension adjustment may be unavailable, so drive gently and avoid rough roads or heavy loads if the vehicle’s ride or handling has changed. Stop if the vehicle sits unusually low, handles unpredictably, or a warning indicates a suspension safety problem.