Charge Air Cooler Temperature/Intake Air Temperature Correlation Bank 1

Descripción

This code is specific to turbocharged engines and indicates a problem with the correlation between the charge air cooler temperature and the intake air temperature for Bank 1. The charge air cooler cools the air before it enters the engine, and this code suggests a mismatch in their temperature readings.

Pasos de reparación

1. 1 Check for any other related diagnostic trouble codes (DTCs) that may help pinpoint whether the charge air cooler temperature sensor or intake air temperature sensor is at fault.
2. 2 Inspect the wiring and connectors for both the charge air cooler temperature sensor and the intake air temperature (IAT) sensor for damage, corrosion, loose pins, or chafing.
3. 3 Check the charge air cooler (intercooler) and associated piping for leaks, cracks, or loose clamp connections that could allow boost pressure to escape and affect temperature readings.
4. 4 Test the charge air cooler temperature sensor with a multimeter to verify its resistance matches manufacturer specifications at ambient temperature; replace if out of range.
5. 5 Test the intake air temperature (IAT) sensor with a multimeter to verify its resistance matches manufacturer specifications at ambient temperature; replace if out of range.
6. 6 Inspect the charge air cooler itself for internal blockage or external debris buildup that could reduce cooling efficiency and cause a temperature correlation mismatch.
7. 7 Replace the faulty charge air cooler temperature sensor or intake air temperature sensor as indicated by testing.
8. 8 If all sensors, wiring, and the charge air cooler test normal, have a professional diagnose the engine control module (ECM) for potential software updates or internal faults.

Diagnóstico y costo