P0388 OBD II Trouble Code Crankshaft Position Sensor B Circuit High Input

Symptoms of P0388 OBD II Trouble Code

  • The engine will not start
  • The tachometer (if equipped) does not register RPM when the engine is cranked
  • Hesitation upon acceleration
  • Poor engine performance
  • Diminished fuel efficiency

Common Causes of P0388 OBD II Trouble Code

  • Defective CKP sensor
  • Open or shorted wiring to the CKP sensor
  • Corroded or fluid soaked connector at the CKP sensor
  • Faulty PCM or PCM programming error
  • Alternator overcharging and affecting PCM operation

Severity of P0388 OBD II Trouble Code

When a P0388 is stored, a no-start condition will likely accompany it. For that reason, this code should be categorized as severe. If the engine will start and run, there remains a high risk of a no-start condition in the near future.