Trouble Code Conditions

4-4-5 PULSED SECONDARY AIR INJECTION SYSTEM PUMP SIGNAL





Trouble Code Condition(s)
- Diagnostic trouble code (DTC) EFI-445 is stored if there is a short-circuit to ground/supply voltage or open-circuit in the secondary air injection system (PAIR) pump signal cable.

Substitute value(s)
- Pulsed secondary air injection system diagnostic disabled.
- Front and rear heated oxygen sensor (HO2S) diagnostic disabled.
- Fuel trim disabled.

Possible source(s)
Signal too high:
- Short-circuit to supply voltage in signal cable.
- Defective pulsed secondary air injection system pump relay.

Signal too low:
- Open-circuit in signal cable.
- Short-circuit to ground in signal cable.
- Contact resistance in terminals.
- Defective pulsed secondary air injection system pump relay.

Fault symptom(s)
- Pulsed secondary air injection system pump can run continuously.





Other DTCs and Status Messages
Status message
- Select one of the following options to continue:

Alternative 1:
- Refer to: Signal Too High. Permanent Fault.

Alternative 2:
- Refer to: Signal Too Low. Permanent Fault.

Alternative 3:
- Refer to: Signal Too High. Intermittent Fault.

Alternative 4:
- Refer to: Signal Too Low. Intermittent Fault.