P1391 Mitsubishi Code - Intermittent Loose Of Camshaft Position Or Crankshaft Position Sensor
Quick Answer
P1391 Mitsubishi indicates Intermittent Loose Of Camshaft Position Or Crankshaft Position Sensor. Common causes include Faulty Camshaft Position (CMP) Sensor, Faulty Crankshaft Position (CKP) Sensor, Camshaft Position Sensor harness is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1391 Mitsubishi indicates Intermittent Loose Of Camshaft Position Or Crankshaft Position Sensor.
- Common causes
- Common causes include Faulty Camshaft Position (CMP) Sensor, Faulty Crankshaft Position (CKP) Sensor, Camshaft Position Sensor harness is open or shorted.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P1391 Mitsubishi Description
What are the Possible Causes of the DTC P1391 Mitsubishi?
- Faulty Camshaft Position (CMP) Sensor
- Faulty Crankshaft Position (CKP) Sensor
- Camshaft Position Sensor harness is open or shorted
- Camshaft Position Sensor circuit poor electrical connection
- Crankshaft Position Sensor harness is open or shorted
- Crankshaft Position Sensor circuit poor electrical connection
How to Fix the DTC P1391 Mitsubishi?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1391 Mitsubishi code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P1391 Mitsubishi Code
1. What does the OBDII code P1391 mean on a Mitsubishi?
P1391 indicates an intermittent loss of signal from the camshaft position sensor or crankshaft position sensor, which can affect engine timing and performance.
2. What are common symptoms of the P1391 code?
Symptoms may include engine stalling, rough idling, difficulty starting, reduced engine performance, or the Check Engine Light being illuminated.
3. What causes the P1391 code on a Mitsubishi?
Common causes include a faulty camshaft or crankshaft position sensor, damaged wiring or connectors, issues with the timing belt or chain, or a failing engine control module (ECM).
4. Can I drive my Mitsubishi with the P1391 code?
Driving with this code is not recommended as it can lead to engine stalling or further damage due to incorrect timing.
5. How do I diagnose the P1391 code?
Diagnose by checking the camshaft and crankshaft position sensors, inspecting wiring and connectors for damage, and verifying proper engine timing.
6. How do I fix the P1391 code on a Mitsubishi?
Repairs may include replacing the faulty sensor, repairing or replacing damaged wiring, adjusting the timing belt or chain, or reprogramming the ECM if necessary.
7. Can a P1391 code be caused by a bad timing belt?
Yes, a worn or misaligned timing belt or chain can cause intermittent signals from the camshaft or crankshaft position sensors, triggering the P1391 code.
8. How much does it cost to repair the P1391 code?
Costs can vary, but replacing a camshaft or crankshaft position sensor typically ranges from $100 to $300, while timing belt repairs could cost $500 to $1,000.
9. Can a dead battery cause the P1391 code?
A dead or weak battery is unlikely to directly cause this code but could potentially contribute to electrical issues affecting sensor signals.
10. How can I prevent the P1391 code from recurring?
Regularly inspect and maintain your vehicle’s sensors, wiring, and timing components, and address any issues before they worsen.
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