P1239 Mitsubishi Code - Engine RPM Plausibility
Quick Answer
P1239 Mitsubishi indicates Engine RPM Plausibility. Common causes include Faulty Crankshaft Position Sensor, Crankshaft Position Sensor harness is open or shorted, Crankshaft Position Sensor circuit poor electrical connection. 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
- P1239 Mitsubishi indicates Engine RPM Plausibility.
- Common causes
- Common causes include Faulty Crankshaft Position Sensor, Crankshaft Position Sensor harness is open or shorted, Crankshaft Position Sensor circuit poor electrical connection.
- 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 P1239 Mitsubishi Description
What are the Possible Causes of the DTC P1239 Mitsubishi?
- Faulty Crankshaft Position Sensor
- Crankshaft Position Sensor harness is open or shorted
- Crankshaft Position Sensor circuit poor electrical connection
How to Fix the DTC P1239 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 P1239 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 P1239 Mitsubishi Code
1. What does the OBDII code P1239 mean on a Mitsubishi?
P1239 on a Mitsubishi indicates an "Engine RPM Plausibility" issue, meaning the engine's RPM readings are inconsistent or not aligning with expected values.
2. What are the common symptoms of a P1239 code?
Symptoms may include erratic engine performance, difficulty starting, reduced power, and the Check Engine Light being illuminated.
3. What causes the P1239 code to appear?
Common causes include a faulty crankshaft position sensor, damaged wiring or connectors, a malfunctioning engine control module (ECM), or issues with the camshaft position sensor.
4. Can I drive my Mitsubishi with the P1239 code active?
While the vehicle may still be drivable, ignoring the code can lead to further engine performance issues or potential damage. It’s best to address the problem promptly.
5. How do I diagnose the P1239 code on my Mitsubishi?
Start by checking the crankshaft and camshaft position sensors, inspecting the wiring and connectors, and using an OBDII scanner to confirm related data and freeze frame information.
6. How do I fix the P1239 code on a Mitsubishi?
Repairs may include replacing a faulty crankshaft or camshaft position sensor, repairing damaged wiring or connectors, or reprogramming or replacing the ECM if necessary.
7. Is the P1239 code specific to Mitsubishi vehicles?
While P1239 can appear on other vehicles, the description and causes may vary. For Mitsubishi, it specifically refers to "Engine RPM Plausibility."
8. Will clearing the P1239 code solve the problem?
Clearing the code without addressing the root cause will only temporarily turn off the Check Engine Light. The issue will likely recur until repairs are made.
9. How much does it cost to fix the P1239 code on a Mitsubishi?
Costs can range from $100 to $500 or more, depending on whether the issue involves sensor replacements, wiring repairs, or ECM reprogramming.
10. Can a weak battery cause the P1239 code to appear?
Yes, a weak or failing battery can cause electrical issues that may lead to the P1239 code, as the ECM may receive incorrect signals.
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