Air Suspension Compressor Circuit Malfunction
The C0162 code means the vehicle's onboard diagnostic system has detected: Air Suspension Compressor Circuit Malfunction. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- hard
- Estimated cost
- $400 - $1,500 (parts and labor)
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Common Symptoms
- Suspension warning light on
- Vehicle sitting at lowest ride height
- Air compressor not running
- Unable to raise vehicle to normal height
- Suspension fault message on dash
Probable Causes (Ranked by Likelihood)
- Failed air suspension compressor motor Very High
- Blown compressor relay or fuse High
- Compressor overheated from air spring leak Moderate
- Corroded compressor wiring connector Low
Step-by-Step Diagnostic Procedure
-
Check air suspension compressor fuse and relay
-
Test power and ground at compressor connector
-
Listen for compressor motor when system attempts to raise vehicle
-
Inspect compressor for overheating signs
-
Check for air leaks that may have overworked the compressor
Frequently Asked Questions
Why did my air suspension compressor fail?
The most common cause is overwork from an air spring leak. When air leaks from a spring, the compressor runs constantly trying to maintain height, eventually burning out the motor.
Can I convert from air suspension to coil springs?
Conversion kits are available for many vehicles. They replace the air springs with conventional coil springs and struts, eliminating the air system. However, you lose the adjustable ride height feature.
How can I tell if the compressor or an air spring is the problem?
If you hear the compressor running but the vehicle does not rise, an air leak is likely. If the compressor does not run at all, the compressor motor, relay, or fuse may have failed.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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