Air Spring Pressure Sensor Circuit Malfunction
What does C0164 mean?
The C0164 code means the vehicle's onboard diagnostic system has detected: Air Spring Pressure Sensor Circuit Malfunction. This is a moderate severity code.
Common Symptoms
- Suspension system warning on
- Incorrect ride height at one or more corners
- Air compressor running excessively
- Vehicle bouncing or floating over bumps
- Suspension system enters fault mode
Probable Causes (Ranked by Likelihood)
- Failed air spring pressure sensor Very High
- Air line leak near pressure sensor High
- Corroded pressure sensor connector Moderate
- Suspension module pressure input fault Low
Step-by-Step Diagnostic Procedure
-
Scan suspension module for pressure sensor DTCs
-
Read pressure data from all air springs with scan tool
-
Inspect pressure sensor for damage or corrosion
-
Check air lines near sensor for leaks
-
Compare pressure readings to specifications at various heights
Frequently Asked Questions
What does the air spring pressure sensor measure?
It monitors the air pressure inside the air spring or the main air supply tank. The suspension module uses this data along with ride height sensor data to control the suspension system.
Can a pressure sensor cause the compressor to overwork?
Yes. If the sensor reads lower than actual pressure, the system will run the compressor trying to reach the target pressure, potentially overheating and damaging the compressor.
How many pressure sensors does my vehicle have?
This varies by system. Some vehicles have a sensor at each air spring, while others have a single sensor at the air supply tank or valve block. Check your service manual for specifics.