Powertrain, generic · Computer and auxiliary outputs

P0614 ECM/TCM Incompatible

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P0614 means the software or calibration variant of the engine module does not match the fitted transmission module or transmission type, or the transmission module is not registered. CARB allows modules with several calibration variants (for example manual and automatic) to share one calibration ID only if a wrong variant turns on the lamp – exactly this check. GM's V6 engines (Saab 9-5 2010) run it continuously with ignition on and light the lamp in the first trip, also for incomplete programming; Saab's Bosch ME9 sets it when a wrong variant is programmed, without any other system reaction. Typical cases are a used module from a car with a different gearbox or a software update applied to only one of the two modules.

Likely causes

Engine or transmission module replaced and not matched or registered
Used module with the wrong variant (different gearbox or engine)
Software update on only one of the two modules
Internal engine module fault

Symptoms

  • Check engine light on
  • Possibly transmission limp mode or limited shifting
  • Sometimes no other symptoms

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€80–400
Time0.5–1.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

engine control moduletransmission control module

Related codes

P0613P0631P0630P0610P0602

References: law.cornell.edu, saabwisonline.com, saabwisonline.com.