A/C Compressor Motor Voltage A Low
What it means
The A/C compressor motor voltage A circuit is reading lower than the module expects. The motor drives the electric A/C compressor, and the control module monitors its electrical supply to run it safely.
Can I keep driving? Yes; this affects the A/C only, but get it read before it spreads damage to the compressor. Do not open high-voltage (orange) cables or covers yourself; leave that to a trained technician.
What this part does
This sensor measures the voltage supplied to the electric A/C compressor motor or its drive electronics. The compressor control module uses it to confirm the compressor is getting the power it needs and to protect the circuit from voltage that is too high or low. It is part of a high-voltage system, so work on it is for trained people. If the signal is lost, the A/C may cool poorly or not run.
Common symptoms
What you'll notice
- Weak or no cold air coming out of the air conditioning system
- A/C system not functioning properly or not cooling as effectively
- Strange noises or vibrations coming from the A/C
- A/C compressor clutch not engaging or disengaging correctly
- Increased strain on the engine when the A/C is turned on
Common causes
Most likely first
- Faulty A/C compressor motor
- Low voltage in the A/C compressor circuit
- Malfunctioning A/C compressor relay
- Wiring issues in the A/C compressor circuit
- Faulty A/C control module
How to diagnose & fix
Work through it in order
- Check the voltage supply to the A/C compressor motor and ensure it is within the recommended range.
- Inspect and clean the electrical connections leading to the A/C compressor motor.
- Replace the A/C compressor motor if it is found to be faulty or damaged.
- Check for any wiring issues or shorts that may be causing the low voltage problem.
Related codes
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