Ambient Air Temperature Sensor Circuit B Low

Descripción

This code indicates that the ambient air temperature sensor 'B' is reading a temperature that is too low. The car's computer believes the outside air is colder than it actually is.

Pasos de reparación

1. 1 Check if the vehicle has been exposed to extreme cold temperatures, as this can cause a false low reading; if so, allow the vehicle to warm up and clear the code to see if it returns.
2. 2 Inspect the ambient air temperature sensor 'B' connector for corrosion, moisture, or loose pins and clean or reseat the connector as needed.
3. 3 Inspect the wiring harness leading to the ambient air temperature sensor 'B' for damaged, chafed, or broken wires and repair as necessary.
4. 4 Test the ambient air temperature sensor 'B' circuit with a multimeter to check for proper resistance values according to manufacturer specifications.
5. 5 Check for short circuits to ground in the sensor 'B' wiring that could cause a low voltage reading.
6. 6 Replace the faulty ambient air temperature sensor 'B' if resistance values are out of specification.
7. 7 Have the engine control module (ECM) inspected and tested by a professional if all wiring and the sensor test normal.

Diagnóstico y costo