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2006 Chevrolet Trailblazer LT 4.2L Poor Idle Quality, Stall, Misfire, MIL Lamp on
Posted to GM Driveability on 8/3/2021 11 Replies

Towed in by customer. Will start and run but miss on cylinders 4 and 5 all times. Compression, spark, fuel all seem good. Seems to run better when vacuum leak is added. Sensors seem to be reading ok on data, fuel trim staying good, Doesn't run well enough ...

11 Replies Received (View Replies)

  Related Documents & Media  2006 Chevrolet Trailblazer LT

 
Message Closed w/FIX

car Vehicle Data

2006 Chevrolet Trailblazer LT

VIN 1GNET16S66
Engine4.2 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection / sefi
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Stall, Misfire, MIL Lamp On
OccursAlways

Trouble Codes

P0030Heated Oxygen Sensor (Bank 1 Sensor 1) Heater Relay Circuit Malfunction
P0300Multiple Misfire Detected
Message Closed w/FIX

car Vehicle Data

2006 Chevrolet Trailblazer LT

VIN 1GNET16S66
Engine4.2 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection / sefi
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Stall, Misfire, MIL Lamp On
OccursAlways

Trouble Codes

P0030Heated Oxygen Sensor (Bank 1 Sensor 1) Heater Relay Circuit Malfunction
P0300Multiple Misfire Detected