Ambient Air Temperature Sensor Circuit B

Where it lives

For P00D9, the sensor sits on the circuit this code reports. The description of P00D9 reports a fault at the sensor.

Check these first

• A failed ambient air temperature sensor B
• An open or short in the sensor B wiring
• A corroded sensor B connector
• A sensor B that is out of calibration
• A faulty ECM input for sensor B

What to do next

1. Read the ambient air temperature on a scan tool
2. Inspect the sensor B connector and wiring
3. Test the sensor B resistance against spec
4. Replace sensor B if it is out of range
5. Check the ECM if the signal stays wrong
6. Clear the code and retest

Look up another code