P07EC
Transmission Range Multi Function Select Circuit
Generic OBD-II
Common symptoms
What you'll notice
- Check for loose or damaged wiring connections in the Transmission Range Multi Function Switch
- Inspect and clean the Transmission Range Multi Function Switch contacts
- Replace the Transmission Range Multi Function Switch if necessary
- Check and reset the Transmission Range Multi Function Switch calibration
Common causes
Most likely first
- Faulty transmission range selector switch
- Wiring or connector issues in the transmission range selector circuit
- Malfunctioning transmission control module (TCM) or powertrain control module (PCM)
- Incorrect adjustment or alignment of the transmission range selector
- Defective park/neutral position switch (PNP switch)
How to diagnose & fix
Work through it in order
- Difficulty shifting gears
- Delayed engagement or disengagement of the transmission
- Inability to engage certain gears (e.g., unable to shift into reverse or overdrive)
- Incorrect gear display on the instrument cluster
- Harsh or erratic shifting
Read & clear P07EC yourself
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