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Symptom chart (vehicles without supercharger) Symptom
Possible cause
Action
Vehicle does not start/hard starting/poor performance
Restricted/blocked air intake Restricted/blocked air cleaner element
Clear the restriction, Air Cleaner (19.10.05) Replace the air cleaner element as necessary, Air Cleaner Element (19.10.08)
Excessive intake noise
Intake pipe disconnected/damaged after Air cleaner assembly incorrectly assembled/damaged
Check the intake system and hoses for correct installation/damage, Air Cleaner (19.10.05)
Symptom Possible cause
Action
Lack of boost
Supercharger drive belt Supercharger fault supercharger air intake elbow Major air leakage (after the
Check the supercharger and drive belt (see visual inspection). For supercharger air intake elbow tests, GO to Pinpoint Test G532443p1. Check the charge air coolers and pipework (see visual inspection).
Noise
Supercharger drive belt slipping Supercharger fault Major air leakage (after the
Check the supercharger and drive belt (see visual inspection). Remove the supercharger drive belt and recheck for noise. Turn the supercharger by hand and check for excessive resistance. Check the supercharger pulley for excessive play. Check the charge air coolers and pipework (see visual inspection).
DTC index NOTE:
Generic scan tools may not read the codes listed, or may read only 5-digit codes. Match the 5 digits from the scan tool to the first 5 digits of the 7-digit code listed to identify the fault (the last 2 digits give extra information read by the manufacturer-approved diagnostic system).
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