P1390 – Timing Belt Skipped One Or More Teeth

P1390 Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P1390 Possible Causes

Timing belt has jumped one or more teeth,Loose Camshaft or Crankshaft Position Sensor

P1390 Description

With the engine running, the Powertrain Control Module (PCM) enables the Inhibit condition test every 44 ms and monitors for misalignment between the Camshaft Position (CMP) and Crankshaft Position (CKP) sensors. If the CMP signal is offset from the CKP sensor one tooth or more, this trouble code is set. With a cold engine or if the start-to-run transfer is too long Whenever engine speed is outside of its given windows Whenever there is a large change in MAP sensor input