P2448

Test 1:

Test 2 - 4:

Test 5 - 8:

Test 9 - 12:

Test 13 - 16:

SYMPTOM
P2448-AIR INJECTION SYSTEM HIGH FLOW

WHEN MONITORED
Engine Running. The Air Injection Pump is active.

SET CONDITION
The PCM detects that there is too much air flow. Two Trip Fault.

POSSIBLE CAUSES
- Good trip equal to zero
- Visual and physical inspection of the air injection system inspection
- Exhaust one-way valve
- Fused battery voltage output circuit
- Air injection pump relay
- Air injection pump ground circuit
- Air injection pump motor
- Air injection passages
- MAF sensor internal failure
- MAP signal circuit shorted to ASD relay output circuit
- MAP signal circuit shorted to battery voltage
- MAF signal circuit open
- MAF signal circuit shorted to ground
- MAF signal circuit shorted to (K4) sensor ground circuit
- Sensor ground circuit open
- PCM