P256F
A/C Request B Circuit Range/Performance
P256F is an OBD-II diagnostic trouble code meaning: A/C Request B Circuit Range/Performance. Common causes: open or short circuit in a/c b request circuit, air conditioning relay malfunction. Estimated repair cost: $6–56.
Symptoms
- Air conditioner won't turn on
- Intermittent operation of the air conditioner
- Check Engine light comes on
- Reduced engine power when the air conditioner is turned on
Causes
- Open or short circuit in A/C B request circuit
- Air conditioning relay malfunction
- Problems with the climate control unit
- Engine control unit (ECU) malfunction
- Poor contact in circuit connectors
How to Fix
- Check the continuity of the A/C B request circuit
- Check the operation of the air conditioner relay
- Diagnose the climate control control unit
- Check connections and connectors in the circuit
- If necessary, replace faulty components
Related codes
Error P256F by Vehicle Brand
FAQ
What does the P256F code mean?
P256F is an OBD-II diagnostic trouble code that indicates: A/C Request B Circuit Range/Performance
What causes a P256F error code?
The most common causes of P256F include: Open or short circuit in A/C B request circuit; Air conditioning relay malfunction; Problems with the climate control unit; Engine control unit (ECU) malfunction.
How do I fix a P256F diagnostic trouble code?
To fix P256F: Check the continuity of the A/C B request circuit. Check the operation of the air conditioner relay. Diagnose the climate control control unit. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P256F?
Yes, but get it checked soon
How much does it cost to fix P256F?
The estimated repair cost for P256F is $6–56. Actual cost depends on your vehicle, location, and labor rates.
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