DE1 - KOEO Code 193: Check FF Sensor VPWR Circuit

Diagnostic Trouble Code (DTC) 193 indicates a failure in the Flexible Fuel (FF) sensor circuit has been detected.

Possible causes:

- Open in FF sensor VPWR harness circuit.

- Short to ground in FF sensor VPWR harness circuit.

- Open in battery ground to FF sensor circuit.

- Short to power in FF sensor battery ground circuit.

- Open in FF sensor signal circuit.

- Short to power in FF sensor signal circuit.

- Short to ground in FF sensor signal circuit.

- Fuel separation.

- Damaged FF sensor.

Damaged Powertrain Control Module (PCM).

- Key "OFF".

- Disconnect FF sensor.

- Key "ON".

- Measure VPWR voltage between the FF sensor VPWR pin at the vehicle harness connector and battery ground.

- Key "OFF".

- Is the voltage greater than 10.5 volts?

Yes -- Go to DE2. DE2 - Check Continuity of FF Sensor Battery Ground Circuit

No -- Service open or short circuit in FF sensor VPWR circuit. Reconnect all components. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)