× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
2012 Chevrolet Impala LT 3.6L Check engine light
Posted to GM Driveability on 11/22/2024 12 Replies

I have codes P0171 and P0174. 38% positive fuel trim at idle and around 25% positive cruising and WOT. I blocked off purge, blocked off pcv, smoke tested intake, inspected intake tube, used propane around intake with no change in fuel trim, smoke tested ex...

12 Replies Received (View Replies)

  Related Documents & Media  2012 Chevrolet Impala LT

 
Message Closed w/FIX

car Vehicle Data

2012 Chevrolet Impala LT

VIN 2G1WB5E32C
Engine3.6 L / 6 cyl / GAS
Trans6-speed Automatic (Electronic)
DeliveryFuel Injection / Direct Injection
EmissionsOBD-II Compliant
SymptomsCheck Engine Light
OccursAlways, Under Load, Idle

Trouble Codes

P0171Fuel System Too Lean (Bank 1)
P0174Fuel System Too Lean (Bank 2)
Message Closed w/FIX

car Vehicle Data

2012 Chevrolet Impala LT

VIN 2G1WB5E32C
Engine3.6 L / 6 cyl / GAS
Trans6-speed Automatic (Electronic)
DeliveryFuel Injection / Direct Injection
EmissionsOBD-II Compliant
SymptomsCheck Engine Light
OccursAlways, Under Load, Idle

Trouble Codes

P0171Fuel System Too Lean (Bank 1)
P0174Fuel System Too Lean (Bank 2)