67 A/C Pressure Sensor Circuit Fault

Make
GM (1982-1995)
Category
Powertrain - Computer and Auxiliary Controls
Severity
Check Engine Light
Applies to
1990-1995 Corvette, Camaro, Lumina, C/K trucks

How to read it

Code 67 reads as 6 flashes, pause, 7 flashes on the check-engine light. Jump terminals A and B on the ALDL connector with the key off, then turn the key on with the engine off and count the check-engine flashes.

What does GM code 67 mean?

67. A/C Pressure Sensor Circuit Fault. This code sets when your vehicle computer detects a/c pressure sensor circuit fault.

Common causes of 67

How to fix 67

  1. Read codes with an ALDL scan tool
  2. Backprobe the sensor for 5 volt reference and ground
  3. Check the signal wire for shorts or opens
  4. Compare the sensor value with gauge pressure
  5. Replace the sensor if reference is good but output is wrong
  6. Clear the code and run the A/C to verify

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