Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information EFI-445

EFI-445 Pulsed secondary air injection system (PAIR) pump, signal

Condition




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
- pulsed secondary air injection system (PAIR) diagnostic disabled
- front and rear heated oxygen sensor (HO2S) diagnostic disabled
- fuel trim disabled.

Possible source

Signal too high:
- short-circuit to supply voltage in signal cable
- defective pulsed secondary air injection system (PAIR) pump relay.

Signal too low:
- open-circuit in signal cable or power cable
- short-circuit to ground in signal cable
- contact resistance in terminals
- defective pulsed secondary air injection system (PAIR) pump relay

Fault symptom[s]
- pulsed secondary air injection system (PAIR) pump may run continuously.