Ambient Air Temperature Sensor Circuit B Intermittent/Erratic

Descripción

This code indicates that the ambient air temperature sensor 'B' is giving inconsistent or erratic readings. The signal from the sensor is jumping around, making it difficult for the car's computer to get a reliable temperature reading.

Pasos de reparación

1. 1 Check the electrical connector at the ambient air temperature sensor 'B' for looseness, corrosion, or damage and clean or reseat it as needed.
2. 2 Inspect the wiring harness running to the ambient air temperature sensor 'B' for chafing, fraying, broken wires, or exposure to heat damage.
3. 3 Clear the diagnostic trouble code and monitor for intermittent recurrence while wiggling the connector and wiring to identify loose connections.
4. 4 Test the ambient air temperature sensor 'B' with a multimeter to verify resistance values match manufacturer specifications across a range of temperatures.
5. 5 Repair or replace any damaged wiring or connectors found in the sensor 'B' circuit.
6. 6 Replace the ambient air temperature sensor 'B' if testing confirms erratic or out-of-range readings.
7. 7 Have the engine control module (ECM) inspected and tested by a professional if all sensor and wiring checks pass without finding a fault.

Diagnóstico y costo