P2280

P2280 - AIR FILTER RESTRICTION

For a complete wiring diagram Consult Diagrams/Electrical

- When Monitored:
With the engine running. The ECM compares mass airflow volume/engine rpm to atmospheric pressure.

- Set Condition:
The ECM detects a 50% or more drop in airflow through the air filter for 5 minutes.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.Initial Inspection and Diagnostic Overview

Diagnostic Test

1. CHECK THE AIR FILTER
Turn the ignition off.
Remove and inspect the Air Filter for soiling or excessive dirt and debris which may cause air flow restriction.
Were any of these problems found?

Yes

- Replace the Air Filter element

No

- Go to 2

2. CHECK FOR INTAKE SYSTEM RESTRICTIONS
NOTE: Damaged, restricted or poorly connected intake and turbocharger related tubes can cause this DTC to set.

Turn the ignition off.
Inspect all air intake and turbocharger related hoses/tubes and connections for leaks, restrictions and damage.
Were any problems found?

Yes

- Repair or replace as necessary.
- Perform the ECM Verification Test Ver. 1. Verification Tests

No

- Go to 3

3. CHECK FOR INTAKE SYSTEM AIR LEAKS
Turn the ignition off.
Remove the Crankcase Vent Heater.
Remove the Mass Air Flow Sensor from the turbocharger inlet tube.
Seal off and/or plug the turbocharger inlet tube where the MAF sensor was removed.
Connect smoke machine 84-04 to the Crankcase Vent Heater port in the intake duct and begin injecting smoke into the intake system.
Observe all intake system components for evidence of smoke leakage.
Is there evidence of smoke leakage?

Yes

- Repair or replace as necessary.
- Perform the ECM Verification Test Ver. 1. Verification Tests

No

- Test Complete.