OBD-II code · Powertrain (generic)
P0709 Transmission Range Sensor A Circuit Intermittent
Same as P0707 with intermittent or erratic signal. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
Is it safe to drive with P0709?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyIntermittent contact at connector
- Less likelyConnector with intermittent contact under vibration
- Less likelyHarness routed against vibrating component
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.6–2 h
- Emissions test
- Usually unaffected
- Parts involved
- Transmission Range Sensor A
Related codes
- P2804Transmission Range Sensor B Circuit Intermittent
- P0706Transmission Range Sensor Circuit Range/Performance
- P0707Transmission Range Sensor A Circuit Low
- P0708Transmission Range Sensor A Circuit High
- P070ATransmission Fluid Level Sensor Circuit
- P070BTransmission Fluid Level Sensor Circuit Range or Performance
- P070CTransmission Fluid Level Sensor Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.