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2003 Chevrolet Trailblazer LS 4.2L MIL Lamp on
Posted to GM Driveability on 2/1/2006 5 Replies

Trailblazer that runs fine but sets PO171 System Lean code at idle. Long term fuel trim at 22 Short trim fluctuating near 0. Fuel pressure good at 54 PSI, no vacuum leaks found, sensor data looks good, oxygen sensor switching very good. Also had a U1000 - clas...

5 Replies Received (View Replies)

  Related Documents & Media  2003 Chevrolet Trailblazer LS

 
Message Closed w/FIX

car Vehicle Data

2003 Chevrolet Trailblazer LS

VIN 1GNET165X3
Engine4.2 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursIdle, Intermittently

Trouble Codes

P0171Fuel System Too Lean (Bank 1)
U1000Class 2 Communication Malfunction
Message Closed w/FIX

car Vehicle Data

2003 Chevrolet Trailblazer LS

VIN 1GNET165X3
Engine4.2 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursIdle, Intermittently

Trouble Codes

P0171Fuel System Too Lean (Bank 1)
U1000Class 2 Communication Malfunction