Transmission Range Sensor Circuit Intermittent

Possible causes

• CommonLoose, corroded or backed-out connector pin
• CommonChafed or fatigued wiring that makes contact until it moves
• CommonWorn sensor contacts, losing signal between positions
• PossibleWater ingress into the connector, intermittent when wet
• PossibleWorn selector linkage letting the sensor drift between detents

What you might notice

• Transmission occasionally drops into limp mode and then recovers
• Gear display flickers
• Occasional failure to start
• Fault appears in specific conditions - over bumps, when hot, or in the wet

What to check, in order

1. Note when it happens. Over bumps means wiring; when hot means the sensor; when wet means the connector. That one observation is worth more than any measurement here.
2. Wiggle-test the harness and connector with the live data screen showing the selector position.
3. Inspect the connector for a pin that has backed out of its housing - the most common single cause of an intermittent sensor signal.
4. Check the sensor adjustment and the linkage for free play.
5. Do not replace the sensor on the strength of an intermittent code alone. Confirm the fault at the sensor first.