P256C
Engine Idle Speed Selector Sensor/Switch Circuit Low
P256C is an OBD-II diagnostic trouble code meaning: Engine Idle Speed Selector Sensor/Switch Circuit Low. Common causes: faulty idle speed selection sensor, open or short circuit in the sensor circuit. Estimated repair cost: $17–67.
Symptoms
- Unstable idle speed
- Engine stalling at idle
- Check Engine Light Illuminates
- Reduced engine power
- Problems starting the engine
Causes
- Faulty idle speed selection sensor
- Open or short circuit in the sensor circuit
- Poor contacts or corrosion in connectors
- Problems with the engine ECU
- Faulty relay or fuse
How to Fix
- Check sensor voltage and resistance to specifications
- Inspect the wiring harness and connectors for damage.
- Check fuses and relays associated with the sensor circuit
- Replace the faulty sensor if necessary
- Reflash the ECU if there are no hardware faults
Related codes
Error P256C by Vehicle Brand
FAQ
What does the P256C code mean?
P256C is an OBD-II diagnostic trouble code that indicates: Engine Idle Speed Selector Sensor/Switch Circuit Low
What causes a P256C error code?
The most common causes of P256C include: Faulty idle speed selection sensor; Open or short circuit in the sensor circuit; Poor contacts or corrosion in connectors; Problems with the engine ECU.
How do I fix a P256C diagnostic trouble code?
To fix P256C: Check sensor voltage and resistance to specifications. Inspect the wiring harness and connectors for damage.. Check fuses and relays associated with the sensor circuit. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P256C?
Yes, but get it checked soon
How much does it cost to fix P256C?
The estimated repair cost for P256C is $17–67. Actual cost depends on your vehicle, location, and labor rates.
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