P1538 OBD Trouble Code

1 result found

P1538 - GM
Type Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description

Air Conditioning Request Circuit Voltage High Conditions
Cause

DTC P1605 not set, A/C compressor requested on by HVAC serial data, then PCM detected the A/C request line was high (for 20 seconds)

Try also: https://www.obd-codes.com/p1538