P0338 — Crankshaft Position Sensor A Circuit High Input
Drivable short-term, but fix now to avoid damage.
What P0338 means
This code means the voltage in the crankshaft position sensor circuit is higher than expected, usually pointing to a wiring short to voltage, an open circuit, a connector problem, or a failed sensor. With an unreliable signal, the computer can't properly time the spark and fuel, so the engine may run rough, stall, or fail to start. The typical fix is inspecting and repairing the wiring and connector and replacing the sensor if it has failed.
Common symptoms
- Check engine light is on
- Engine misfires or runs rough
- Hard starting or no-start condition
- Unexpected stalling
- Hesitation or loss of power while driving
Common causes
- Short to voltage in the sensor wiring
- Open circuit in the sensor harness
- Failed crankshaft position sensor
- Faulty or corroded electrical connector
- Damaged wiring near the sensor
Typical repair cost
$180 – $500
Varies by vehicle and root cause.
Frequently asked questions
Can I keep driving with a P0338 code?
Only to get it to a shop. The engine can stall or refuse to start without warning when this sensor isn't reading correctly, so it's not safe to rely on. Have it diagnosed as soon as you can.
How much does it cost to fix a P0338 code?
Most repairs cost between $180 and $500. A simple wiring or connector repair is on the lower end, while replacing a sensor in a hard-to-reach location pushes the labor and total cost higher.
Is a P0338 code serious?
Yes. The crankshaft position sensor is vital for the engine to run, and a high or faulty signal can cause stalling or a no-start. It should be diagnosed and repaired without delay.
What does high input mean for the crankshaft sensor?
High input means the circuit voltage is reading above the normal range, often from a wire shorted to power, an open circuit, or a failed sensor. A technician will test the wiring and sensor to confirm the cause.