P2604

Intake Air Heater A Circuit Range/Performance

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–89 (est.)

Symptoms

Difficulty starting the engine in cold weather
Check Engine Light Is On
Reduced engine power
Increased fuel consumption
Unstable operation at idle

Causes

Heating element malfunction
Open or short circuit in the circuit
Problems with the heater relay
Engine control unit malfunction
Poor contact in connectors

How to Fix

Check the heater circuit fuse
Diagnose the resistance of the heating element
Check the integrity of wiring and connectors
Test the operation of the heater relay
If necessary, replace the heating element

Related codes

P2605 P2603 P2600