OBD-II code · Powertrain (generic)

P0338 Crankshaft Position Sensor "A" Circuit High Input

The CKP signal voltage is above the upper threshold. Either a sensor producing excess output or a short to supply voltage.

Is it safe to drive with P0338?

Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.

Common causes

  • Most likelySignal wire shorted to supply voltage
  • PossibleSensor failed
  • Less likelyConnector pins corroded - high contact resistance

Repair at a glance

Difficulty
Medium
DIY friendly
Often, with basic tools
Typical labour
0.5–4 h
Emissions test
Likely to fail
After the fix
A drive cycle is needed before the light stays off
Parts involved
Crankshaft Position Sensor, Crankshaft Position Sensor Wiring

Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.