This diagnostic trouble code indicates the powertrain control module has detected a voltage condition in the air conditioning clutch relay control circuit that is lower than normal. This electrical fault prevents the relay from energizing properly, which stops the A/C compressor from engaging. The problem is located in the wiring or components managing the relay signal, not necessarily the refrigerant system.
Internal coil failure or contact welding within the relay is the most common trigger for control circuit codes.
Wires controlling the relay may be chafed or damaged, creating a direct path to ground that lowers circuit voltage.
A short circuit in the relay control side often causes the protective fuse to open, resulting in low voltage readings.
Corrosion or looseness at the relay socket or PCM connector can disrupt voltage signals and cause false low readings.
An internal short in the clutch electromagnet can draw excessive current, affecting the control circuit integrity.
Internal driver failure is rare and should only be considered after all external circuits and components are verified.
Rarely. This code is usually caused by the relay, wiring, or clutch itself, not the computer. Replace the PCM only after all external electrical faults are ruled out.
Yes, but the air conditioning will not function, and engine cooling fans may not operate correctly depending on the vehicle design.
This indicates a persistent short to ground in the wiring or a failed clutch coil drawing excessive current that must be located and repaired.
Yes, because the code illuminates the check engine light, it will cause an emissions test failure in most regions.