OBD-II code · Powertrain (generic)
P07F3 Transmission Range Control Module Communication Circuit Low
Range control module communication line reads stuck low — bus shorted to ground or one node held the line low continuously.
Is it safe to drive with P07F3?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyBus shorted to ground
- Less likelyGateway module routing CAN messages incorrectly
- Less likelyCAN terminating resistor (120 Ω) drifted out of spec
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
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.8–4 h
- Emissions test
- Usually unaffected
- Parts involved
- Range Control Module, Communication Bus
Related codes
- P07F2Transmission Range Control Module Communication Circuit
- P07F0Transmission Range Multi-Function Select Circuit High
- P07F1Input/Turbine Shaft Speed Sensor C Circuit
- P07F4Transmission Range Control Module Communication Circuit High
- P07F5Transmission Range Control Module System Voltage Low
- P07F6Gear 9 Incorrect Ratio
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.