C0311
Air Suspension Compressor Overheating
2004-2007 Buick Rainier 4.2L I6 🇨🇦
Moderate SeverityChassis
Description
The air suspension compressor has exceeded its maximum operating temperature.
Symptoms
- Suspension warning light
- Compressor shuts off
- Vehicle sags after extended operation
- Compressor runs excessively before shutting off
Common Causes
- Air leak causing compressor to run too long
- Compressor worn internally
- Blocked intake filter
- High ambient temperature combined with heavy load
Diagnostic Steps
- Check all air springs and lines for leaks using soapy water
- Inspect compressor intake filter
- Monitor compressor run time
- Check for leak codes at individual air springs
- Test compressor output volume
Repair Notes
Find and repair air leaks first. Replace compressor if worn. Clean or replace intake filter.
Related Codes
Other Chassis Codes
- C0021LF Wheel Speed Sensor Range/Performance
- C0022RF Wheel Speed Sensor Range/Performance
- C0023LR Wheel Speed Sensor Range/Performance
- C0024RR Wheel Speed Sensor Range/Performance
- C0025LF Wheel Speed Sensor Circuit Intermittent
- C0026RF Wheel Speed Sensor Circuit Intermittent
- C0027LR Wheel Speed Sensor Circuit Intermittent
- C0028RR Wheel Speed Sensor Circuit Intermittent
- C0035Left Front Wheel Speed Sensor Circuit
- C0036Left Front Wheel Speed Signal Erratic
C0311 on Other Vehicles
Common Questions
What does code C0311 mean on a 2004-2007 Buick Rainier?
C0311 stands for "Air Suspension Compressor Overheating". The air suspension compressor has exceeded its maximum operating temperature.
What are the symptoms of C0311 on a Buick Rainier?
Common symptoms of C0311 include: Suspension warning light, Compressor shuts off, Vehicle sags after extended operation, Compressor runs excessively before shutting off.
What causes C0311 on a 2004-2007 Buick Rainier?
Common causes of C0311 include: Air leak causing compressor to run too long, Compressor worn internally, Blocked intake filter, High ambient temperature combined with heavy load.