P1390 JEEP Possible Causes
- Timing belt has jumped one or more teeth
- Loose Camshaft or Crankshaft Position Sensor
First diagnose P1390 JEEP code
Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded terminals.
Cost of diagnosing the P1390 JEEP code
Labor: 1.0The cost of diagnosing the P1390 JEEP code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
When is the P1390 JEEP code detected?The Powertrain Control Module (PCM) has detected a misalignment between the cam sensor and crank sensor.
P1390 JEEP Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P1390 JEEP MeaningWith 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
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