Intake Air Temperature Sensor 3 Circuit Low Bank 1

Descripción

This code indicates that the third intake air temperature sensor on bank 1 (one side of a V-engine) is reporting a temperature that is too low. The engine's computer is not getting a valid reading from this sensor.

Pasos de reparación

1. 1 Inspect the electrical connector at intake air temperature (IAT) sensor 3 on bank 1 for looseness, corrosion, or damage, and reseat the connection firmly.
2. 2 Check the wiring harness between the IAT sensor 3 and the ECM for signs of chafing, bare wires, or shorts to ground, and repair any damaged sections.
3. 3 Test the IAT sensor 3 circuit voltage and ground signal at the connector using a multimeter to confirm the circuit is reading abnormally low.
4. 4 Replace the intake air temperature sensor 3 on bank 1 if the sensor is found to be faulty or reading out of specification.
5. 5 Inspect and test the ECM connector pins for the IAT sensor 3 circuit to ensure there is no corrosion or bent pins causing a false low signal.
6. 6 Replace or reprogram the engine control module (ECM) if all wiring and sensor tests pass and the code persists.

Diagnóstico y costo