OBD-II code · Powertrain (generic)
P07C4 Input/Turbine Shaft Speed Sensor C Circuit High
Same as sensor A circuit high, applied to sensor C. 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 P07C4?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySignal wire shorted to reference voltage
- Less likelyConnector pins corroded - high contact resistance
- Less likelySupply wire pinched against B+ source
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
- Best left to a mechanic
- Typical labour
- 0.5–2.5 h
- Emissions test
- Usually unaffected
- Parts involved
- Input Shaft Speed Sensor C, Sensor Wiring
Related codes
- P07C0Input/Turbine Shaft Speed Sensor A Circuit High
- P07C2Input/Turbine Shaft Speed Sensor B Circuit High
- P07C1Input/Turbine Shaft Speed Sensor B Circuit Low
- P07C3Input/Turbine Shaft Speed Sensor C Circuit Low
- P07C5Intermediate Shaft Speed Sensor A Circuit Low
- P07C6Intermediate Shaft Speed Sensor A Circuit High
- P07C7Intermediate Shaft Speed Sensor B Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.