P2D42
A/C Compressor Motor Voltage B Low
P2D42 is an OBD-II diagnostic trouble code meaning: A/C Compressor Motor Voltage B Low. Common causes: problems with wiring or contacts in the motor circuit, compressor motor malfunction. Estimated repair cost: $56–278.
Symptoms
- The air conditioner does not turn on or operates intermittently
- Reduced interior cooling efficiency
- Check Engine light comes on
- Noise or knocking noise coming from the compressor area
- The air conditioning system turns off automatically
Causes
- Problems with wiring or contacts in the motor circuit
- Compressor motor malfunction
- Relay or fuse problems
- Air conditioner control module malfunction
- Short circuit in the circuit
How to Fix
- Check the condition of fuses and relays
- Diagnose the motor power supply circuit for opens and short circuits
- Check contacts and connections in the circuit
- Test the compressor motor
- If necessary, replace the motor or compressor assembly
Related codes
Error P2D42 by Vehicle Brand
FAQ
What does the P2D42 code mean?
P2D42 is an OBD-II diagnostic trouble code that indicates: A/C Compressor Motor Voltage B Low
What causes a P2D42 error code?
The most common causes of P2D42 include: Problems with wiring or contacts in the motor circuit; Compressor motor malfunction; Relay or fuse problems; Air conditioner control module malfunction.
How do I fix a P2D42 diagnostic trouble code?
To fix P2D42: Check the condition of fuses and relays. Diagnose the motor power supply circuit for opens and short circuits. Check contacts and connections in the circuit. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P2D42?
Yes, but get it checked soon
How much does it cost to fix P2D42?
The estimated repair cost for P2D42 is $56–278. Actual cost depends on your vehicle, location, and labor rates.
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