Damaged, chafed or corroded wiring to the sensor, including a short to voltage or an open circuit in the signal or ground wire; Faulty intermediate shaft speed sensor C; Poor connection at the sensor or transmission connector, such as bent, pushed-out or corroded terminals; Fluid contamination or metallic debris on the sensor tip affecting the signal, depending on sensor type; Faulty transmission control unit or its internal sensor supply or input circuit; Damaged sensor target wheel or ring on the shaft, depending on the transmission design.

P07CA

Intermediate Shaft Speed Sensor C Circuit High.

Generic
Powertrain
Generic code
Medium severity

How this code is built

P: SystemPowertrain
0: Defined bySAE, the same on every car
7: AreaTransmission
CA: FaultThe specific fault in that area

What it means

P07CA is a generic powertrain code meaning the control unit has detected a high signal on the circuit for intermediate shaft speed sensor C. The transmission or powertrain control unit saw a voltage or signal level above the expected range, which can indicate an open circuit, a short to voltage or a faulty sensor. Which shaft and sensor 'C' refers to depends on the transmission design, so check the manufacturer data for the specific vehicle.

Symptoms

Gearbox warning light or malfunction indicator lamp on
Harsh, delayed or erratic gear changes
Transmission stuck in a single gear (limp mode)
Incorrect or jumping speedometer or rev readings on some models
Loss of manual shift or sport mode function
Poor fuel economy due to missing upshifts or lock-up

Possible causes

Damaged, chafed or corroded wiring to the sensor, including a short to voltage or an open circuit in the signal or ground wirelikely
Faulty intermediate shaft speed sensor Clikely
Poor connection at the sensor or transmission connector, such as bent, pushed-out or corroded terminalspossible
Fluid contamination or metallic debris on the sensor tip affecting the signal, depending on sensor typepossible
Faulty transmission control unit or its internal sensor supply or input circuitrare
Damaged sensor target wheel or ring on the shaft, depending on the transmission designrare

How to diagnose

Read all stored and pending codes and note the freeze frame data, looking for related speed sensor or gearbox codes
Check the transmission fluid level and condition if the transmission has a dipstick or check procedure, as the manufacturer specifies
Inspect the sensor, its wiring and the connectors for damage, chafing, heat damage, leaks or corrosion
Clear the code and see if it returns immediately or only under certain conditions, wiggling the harness while monitoring live data
Check live data for intermediate shaft speed against output and input speed to see whether the reading is implausible
Using the wiring diagram for the vehicle, test the sensor supply, ground and signal circuits for shorts to voltage, opens and high resistance
Test the sensor against the manufacturer's resistance or signal specification where one is given
Inspect the sensor tip and target for debris or damage once access is gained, following the model-specific procedure

How to fix

Repair or replace damaged wiring and fix any short to voltage or open circuit found
Clean, repair or replace faulty connectors and terminals
Replace the intermediate shaft speed sensor C if it fails testing
Correct fluid level or condition and remove debris from the sensor area as the manufacturer instructs
Replace or repair the transmission control unit only after the wiring and sensor are proven good, including any required programming
Repair the damaged target wheel or shaft component where this is confirmed

Can I keep driving?

Medium severity

The car may be driveable, but if it is in limp mode or shifting harshly, limit use and have it checked soon. Continued driving with poor shifting could cause further transmission wear.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.