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2000 Cadillac DeVille DHS 4.6L Poor Idle Quality, Misfire, MIL Lamp on
Posted to GM Driveability on 7/12/2012 18 Replies

Hello all Just got done doing head gaskets and timeserts started vehicle and noticed right away that it had a misfire at idle and the MLS light was on. Increased rpm to around 1800 and noticed engine smoothed out. Checked for a misfire with the scanner, code p...

18 Replies Received (View Replies)

  Related Documents & Media  2000 Cadillac DeVille DHS

 
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car Vehicle Data

2000 Cadillac DeVille DHS

VIN 1G6KE57Y5Y
Engine4.6 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire, MIL Lamp On
OccursIdle

Trouble Codes

P0300Multiple Misfire Detected
P0436Oxygen Sensor (Bank 1 Sensor 1) Heater Circuit
Message Closed

car Vehicle Data

2000 Cadillac DeVille DHS

VIN 1G6KE57Y5Y
Engine4.6 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire, MIL Lamp On
OccursIdle

Trouble Codes

P0300Multiple Misfire Detected
P0436Oxygen Sensor (Bank 1 Sensor 1) Heater Circuit