Input/Turbine Shaft Speed Sensor A Circuit High

Where it lives

For P07C0, the circuit described runs through the sensor. The description of P07C0 reports a fault at the sensor.

Check these first

• Short to voltage in the ISS/TSS sensor A signal wire
• An open ground in the sensor A circuit
• Corrosion or damage in the sensor A connector
• A failed input/turbine shaft speed sensor A
• Harness chafe shorting the sensor A circuit

What to do next

1. Check reference voltage and ground at ISS/TSS sensor A
2. Inspect the sensor A connector and harness
3. Test the sensor A signal wire for a short to power
4. Monitor ISS and TSS live data during a road test
5. Replace input/turbine shaft speed sensor A if the signal stays high
6. Clear the code and retest

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