What does P1545 mean on a Chevy?

P1545. Air Conditioning Clutch Relay Control Circuit. Applies to Silverado, Sierra, Tahoe, Impala, Malibu, Equinox.

What causes P1545 on a Chevy?

Failed A/C compressor clutch relay in the underhood fuse block Open or shorted relay control wire between the PCM and the fuse block Low refrigerant pressure inhibiting clutch engagement and confusing diagnosis Worn A/C clutch coil drawing excess current through the relay

How do I fix P1545 on a Chevy?

Swap the A/C relay with an identical relay and command the clutch with a Tech2/GDS2 scan tool Verify refrigerant charge with gauges before condemning the electrical circuit Test the relay control circuit for opens and shorts with a multimeter Measure clutch coil resistance; replace the clutch coil if it is shorted

Code

P1545

Air Conditioning Clutch Relay Control Circuit

Category: Powertrain - Computer and Auxiliary Controls
Severity: Check Engine Light
Applies to: Silverado, Sierra, Tahoe, Impala, Malibu, Equinox
Related: No single generic twin. See OBD Codes List

What it means

P1545. Air Conditioning Clutch Relay Control Circuit. This Chevy-enhanced code applies to Silverado, Sierra, Tahoe, Impala, Malibu, Equinox.

Findings, check these first

Failed A/C compressor clutch relay in the underhood fuse block
Open or shorted relay control wire between the PCM and the fuse block
Low refrigerant pressure inhibiting clutch engagement and confusing diagnosis
Worn A/C clutch coil drawing excess current through the relay

Standard procedure

Swap the A/C relay with an identical relay and command the clutch with a Tech2/GDS2 scan tool
Verify refrigerant charge with gauges before condemning the electrical circuit
Test the relay control circuit for opens and shorts with a multimeter
Measure clutch coil resistance; replace the clutch coil if it is shorted

Look up another code

Press / to jump to the box. Chevy-enhanced powertrain, body, chassis and network codes.

Sources and review

Review: no source links are recorded for this entry.

Last updated 2026-09-13.

Report a correction for P1545. Include your vehicle, the issue and a source if you have one.