Error Code Guide
P0542
Low Severity
Intake Air Heater - Circuit High
Don't ignore this warning! Complete diagnostic guide to understand, diagnose, and fix this trouble code.
Step-by-step guide
Repair cost estimates
What does P0542 mean?
The P0542 diagnostic trouble code indicates: Intake Air Heater - Circuit High. This is a powertrain-related code that affects your vehicle's engine or transmission performance. When this code is triggered, the Engine Control Module (ECM) has detected a fault in the related system or component.
Common SymptomsWatch out for these warning signs
- Check Engine Light (CEL) illuminated
- Malfunction Indicator Lamp (MIL) on
- Erratic idle speed
- Speedometer malfunction
- Transmission shifting issues
- Cruise control problems
Possible CausesDiagnose from most to least common
- 1Open or short in wiring harness
- 2Poor electrical connection
- 3Damaged wiring insulation
- 4Faulty ground connection
- 5Excessive voltage or signal
- 6Short to power
- 7Component failure causing high output