Sensor Reference Voltage D Circuit/Open

Where it lives

For P06A3, the circuit described runs through the sensor. The description of P06A3 reports the sensor as open.

Check these first

• An open in the 5 volt reference D circuit
• A short to ground on the reference D circuit
• A failed sensor pulling the reference voltage down
• A chafed or damaged harness
• A fault in the control module reference output

What to do next

1. Inspect the harness and connectors on the reference D circuit
2. Measure the 5 volt reference at each sensor on the D circuit
3. Disconnect sensors one at a time to locate a short
4. Repair any open or chafe found in the circuit
5. Replace the control module only if all wiring tests good
6. Clear the code and retest

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