Applicable Systems
OBD-II
Symptoms
The sensor signal voltage is below the expected minimum. The control module interprets this as a fault condition.
Possible Causes
- Sensor output too low due to internal failure
- Wiring short to ground
- Reference voltage supply missing
Troubleshooting Steps
- Step 1: Measure sensor signal voltage at the control module
Voltage below expected minimum - Step 2: Check wiring for short to ground
No short to ground found - Step 3: Verify sensor reference voltage supply
Reference voltage present
How to Reset
To reset: Clear the DTC after restoring the sensor signal to the valid range.
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Source: SAE J2012 OBD-II Diagnostic Trouble Codes, SAE International
Category: OBD-II
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