Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
To diagnose the P1607 Jeep code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.
The Powertrain Control Module (PCM) compares actual shutdown time to a calculated shutdown time value. The calculated shutdown time value is based on the amount the Engine Coolant Temperature (ECT) should drop after a completely warmed-up engine is shut down for a minimum of 8 hours. If the difference between the actual shutdown time and the calculated shutdown time is greater than the maximum value, a one-trip failure will be set. The shutdown time is measured again after 1 hour of ignition off time following the next engine warm-up cycle. The PCM compares the shutdown time to a calculated value. If the difference is greater than the maximum value, the MIL is illuminated and the P1607 code will be set.
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