For Shop Owners

P1607 JEEP - Powertrain Control Module Internal Shutdown Timer Slow Rationality

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3 What does this mean?

Possible causes

  • Engine cooling conditions that may set the code
  • Engine coolant level
  • Faulty Powertrain Control Module (PCM)
What does this mean?

Possible symptoms

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

P1607 JEEP Description

The Powertrain Control Module (PCM) compares actual shutdown time to a calculated shutdown time value. The calculated shut down time value is based on the amount the ECT should drop after a completely warmed up engine is shut down for a minimum of 8 hours. If the difference between actual shutdown time and the calculated shut down time is greater than a maximum value, a one trip failure will 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 a maximum value, the MIL is illuminated and the P1607 code will set.
OBDII Code P1607 Jeep - Powertrain Control Module Internal Shutdown Timer Slow Rationality -

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P1607 JEEP Comments

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Any information is appreciated. Thanks
Repair Importance Level: 3
1=Low 2=Medium 3=High
Repair Difficulty Level: 3
1=Easy 2=Moderate 3=Hard

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Posted and Edit by 05-26-2016

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