Intake Air System and Exhaust System Symptom Troubleshooting Index (With Turbocharger)

Intake Air System and Exhaust System Symptom Troubleshooting Index

Symptom

Diagnostic procedure

Also check for

Engine abnormal noise while fuel cut-off control

1.	Check for PGM-FI DTCs.
2.	Inspect the turbocharger bypass control valve vacuum hose for squashed or damaged.
3.	Check the turbocharger bypass control valve.

Engine low power

Inspect the charge air cooler for foreign materials or clogged.

Inspect the intake air system for clogged.

?	Air cleaner element
?	Charge air cooler core