Ambient Air Temperature Sensor Circuit B

Common symptoms

What you'll notice

• Check and clean the sensor connector and wiring: Ensure proper connection and remove any dirt or corrosion from the sensor and wiring.
• Replace the ambient air temperature sensor: If cleaning and checking the connector does not solve the issue, replace the faulty sensor with a new one.
• Inspect the sensor for any physical damage: Examine the sensor for any visible damage or defects. If found, replace the sensor.
• Check the circuit for voltage irregularities: Test the circuit for any voltage fluctuations or abnormalities. Repair or replace any faulty wiring or connections.
• Reset the OBD2 error code: After performing the necessary repairs or replacements, reset the OBD2 error code to see if the issue is resolved.

Common causes

Most likely first

1. Faulty ambient air temperature sensor
2. Loose or damaged wiring associated with the ambient air temperature sensor
3. Faulty engine coolant temperature sensor
4. Faulty intake air temperature sensor
5. Engine control module (ECM) malfunction

How to diagnose & fix

Work through it in order

1. Engine running hot or overheating
2. Intermittent or constant air conditioning issues
3. Erratic idle or stalling
4. Decreased fuel efficiency
5. Check Engine Light (CEL) or Malfunction Indicator Lamp (MIL) illuminated