What does P0338 mean?
The crankshaft position (CKP) sensor reads a toothed wheel on the crankshaft. The computer uses it for engine speed, spark and injection timing. Without it, most engines will not run.
The signal is above the expected range, usually a wiring or sensor fault.
Codes are a starting point. They tell you which test failed, not which part to replace. Check for other stored codes and fix those in a sensible order.
Symptoms
- Engine cranks but will not start
- Stalling, often when hot
- Intermittent loss of tach signal
- Misfires or rough running
Common causes
- Signal wire shorted to voltage
- Open ground
- Damaged sensor
How to diagnose P0338
- Inspect the connector and harness.
- Check the circuit for shorts to voltage and for a good ground.
- Replace the sensor if the wiring is good.
- Check whether the tachometer moves while cranking. No movement often means no CKP signal.
- Inspect the sensor and connector for oil, damage and debris.
How to fix it
- Replace the crankshaft position sensor
- Repair wiring
- Repair the tone wheel
Estimated repair cost
Likely repairs for P0338 run from about $100 to $400, depending on the cause.
| Repair | Typical range (parts + labor) |
|---|---|
| Diagnostic fee (scan + testing) | $100 - $200 |
| Crankshaft position sensor | $120 - $350 |
| Wiring/connector repair | $100 - $400 |
These are rough US estimates for an independent shop in 2026, based on typical parts prices and standard labor times. Dealers, big trucks, luxury brands and high-cost areas often run higher. They are not quotes. Use the repair cost estimator to adjust for your vehicle.
How serious is P0338?
High severity
Not recommended. A failing crank sensor can kill the engine while you are driving.
P0338 FAQ
What does P0338 mean?
P0338 stands for "Crankshaft Position Sensor "A" Circuit High". The crankshaft position (CKP) sensor reads a toothed wheel on the crankshaft.
Can I drive with a P0338 code?
Not recommended. A failing crank sensor can kill the engine while you are driving.
How much does it cost to fix P0338?
It depends on the cause. The likely repairs for P0338 range from about $100 to $400 at an independent shop in the US, plus a diagnostic fee of roughly $100-$200. These are rough estimates; dealer prices and some vehicles run higher.
What is the most common cause of P0338?
The most common causes are: signal wire shorted to voltage; open ground; damaged sensor.