P1335 Crankshaft Position Sensor (CKPS) (REF)

Possible causes
  • Harness or connectors (The crankshaft position sensor (REF) circuit is open or shorted.)
  • Crankshaft position sensor (REF)
  • Starter motor
  • Starting system circuit
  • Dead (Weak) battery
    • When is the code detected?
  • Malfunction A: 120 signal is not entered to ECM for the first few seconds during engine cranking
  • Malfunction B: 120 signal is not entered to ECM during engine running
  • Malfunction C: 120 signal cycle excessively changes during engine running.
    • Symptoms
    – Engine Light ON (or Service Engine Soon Warning Light)
    P1335 Description
    The crankshaft position sensor (REF) is located on the oil pan (upper) facing the crankshaft pulley. It detects the TDC (Top Dead Center) signal (120 signal). The sensor consists of a permanent magnet, core and coil. When engine is running, the gap between the sensor and the crankshaft pulley will periodically change. Permeability near the sensor also changes. Due to the permeability change, the magnetic flux near the core is changed. Therefore, the voltage signal generated in the coil is changed. The ECM receives the voltage signal and detects the TDC signal (120 signal).
    P1335 Information for specific makes
    P1335 BUICK
    P1335 CADILLAC
    P1335 CHEVROLET
    P1335 GMC
    P1335 HYUNDAI
    P1335 LEXUS
    P1335 TOYOTA
    P1335 INFINITI
    P1335 NISSAN