Engine-Codes - Jeep - P1239 JEEP

P1239 JEEP - Engine Oil Temperature Too Low

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

P1239 JEEP Possible Causes

  • Engine Oil
  • Faulty Engine Oil Temperature Sensor
  • Engine Oil Temperature Sensor harness is open or shorted
  • Engine Oil Temperature Sensor circuit poor electrical connection
  • Faulty Powertrain Control Module (PCM)

How is the P1239 JEEP code repair?

Start by checking 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 connector's pins.

What is the cost to diagnose the P1239 JEEP code

Labor: 1.0

The cost to diagnose the P1239 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.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P1239 JEEP Meaning

The Engine Oil Temperature (EOT) Sensor is a variable resistor that measures the temperature of the engine oil. The Powertrain Control Module (PCM) supplies a 5-Volt reference and a ground to the sensors low reference signal circuit. When the oil temperature is low, the sensor resistance is high. When the oil temperature is high, the sensor resistance is low. The Diagnostic Trouble Code (DTC) P1239 is set when the Engine Oil temperature rises slower than a calibrated modeled temperature. When the actual oil temperature falls below the low boundary of the calibrated modeled temperature for three minutes the fault is set. Two trip fault. Three good trips to turn off the MIL.

More Information

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