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.
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.
Common causes
- high
Signal wire shorted to reference voltage
One of the most commonly reported causes for this code — check this first.
Typical part cost: $170-770
- low
Connector pins corroded - high contact resistance
Less common, but worth ruling out after the more likely causes.
Typical part cost: $170-770
See all causes + fix costs
Create a free Wrenchify account to unlock the rest for P07C4.
Unlock causesFree forever · No credit card
First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
Get the full step-by-step diagnosis
Create a free Wrenchify account to unlock the rest for P07C4.
Unlock diagnosisFree forever · No credit card
Related codes
See related trouble codes
Create a free Wrenchify account to unlock the rest for P07C4.
Unlock related codesFree forever · No credit card
Frequently asked questions
What does P07C4 mean?
P07C4 means "Input/Turbine Shaft Speed Sensor C Circuit High". It is a generic OBD-II code that points to a fault in the transmission.
What are the most common causes of P07C4?
signal wire shorted to reference voltage; connector pins corroded - high contact resistance; supply wire pinched against b+ source — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
This code points to a problem that can cause damage or affect safety. Avoid driving and have the vehicle diagnosed promptly. Use the Wrenchify app for a full diagnosis specific to your vehicle.
Get the full P07C4 diagnosis for your vehicle
Year, make, model + step-by-step repair help — free plan included.