P0338 Code: Crankshaft Position Sensor A Circuit High Input
🟠 Moderate severity · drivable
If the engine is running, drive with caution to a shop; this code can also cause a no-start.
What P0338 means
The crankshaft position sensor A is sending a voltage that's too high. This sensor tells the computer where the crankshaft is so it can time the spark and fuel. A high reading usually means the sensor is faulty or the wiring is damaged.
Symptoms
- Check engine light is on
- Engine cranks but won't start
- Engine stalling
- Rough running or misfire
Common causes
- most common: Faulty crankshaft position sensor
- common: Open wiring or short to power at the sensor
- common: Loose or corroded connector
- rare: Engine computer fault
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Replace the crankshaft position sensor | Yes | $50–200 |
| Repair damaged sensor wiring | Mechanic | $50–200 |
| Clean and tighten the sensor connector | Yes | $0–10 |
Frequently asked questions
Can I drive with a P0338 code?
Only with caution, and only if the engine is running. It can cause stalling or a no-start.
What is the most common cause of P0338?
A faulty crankshaft position sensor or damaged wiring to it.
How much does it cost to fix a P0338?
Typically $50–$200 for a new crankshaft position sensor.
Related codes
P0335
P0335 Code: Crankshaft Position Sensor Circuit Malfunction
P0336P0336 Code: Crankshaft Position Sensor A Circuit Range/Performance
P0337P0337 Code: Crankshaft Position Sensor A Circuit Low Input
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.