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TCM T8 / P0731 6F

Read the instructions below then start the fault diagnostic procedure.

Symptom: Message appears in display.

  P0731 6F


Gear 1, Faulty Gear Ratio.

Fault symptom

Message appears in display.

On-board diagnosis

Type of diagnosis:

Continuous

Enable criteria:

Engine running and not in limp home mode.
Exceptions:

Output speed < 500 rpm.
Output speed > 1260 rpm.
Acceleration pedal position < 50 %.
Engine speed does not increase for a duration of 1 second.
Driver not driving in 1st gear.
Normal exceptions for shifting error DTC:

Selector lever not in position D.
During shifting.
Oil temperature <= 20 º C
Engine speed <400 rpm.
Battery voltage < 10.5 Volt.
Selector lever in R position.
Malfunction in one of the following systems:

Input speed.
Output speed.
Gear selector position sensor
Gearbox Fluid Temperature Sensor
Engine speed.
ABS vehicle speed.
Accelerator pedal position.

Fault criteria:

Gear ratio measured by the control module varies more than 3% from the expected value.

System reaction to a fault:

Limp home

Diagnostic help

Diagnosis regards:

Locating a mechanical fault.

PRE-RELEASE