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2002 Pontiac Sunfire SE 2.2L MIL Lamp on
Posted to GM Driveability on 12/10/2004 16 Replies

sunfire came from in with code 420 cat efficiency .I searched for related tsb's none found . I noticed front o2 sensor slow to respond on snap trottle test so replaced it. fuel pressure high .removed return line at regulator pressure still 72 lb [...] reg. no ...

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  Related Documents & Media  2002 Pontiac Sunfire SE

 
Message Closed w/Summary

car Vehicle Data

2002 Pontiac Sunfire SE

VIN 1G2JB52432
Engine2.2 L / 4 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursAlways

Trouble Codes

420cat efficiency
Message Closed w/Summary

car Vehicle Data

2002 Pontiac Sunfire SE

VIN 1G2JB52432
Engine2.2 L / 4 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursAlways

Trouble Codes

420cat efficiency