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P1174 CHEVROLET

P1174 CHEVROLET - Fuel Trim Cylinder Balance Bank 1

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3   
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Possible causes

  • Clogged Fuel Injectors
  • Faulty Oxygen sensor
  • Ignition problem
  • Fuel injection problem
  • Engine mechanical condition

Tech notes

The sometimes is triggered by clogged fuel injectors. Start by using high octane fuel and/or fuel additive to clean injectors. If problem persists fuel injectors may need to be replace.

There is a factory service bulletin for the following Chevrolet models:

2000 Chevrolet S-10
2000-2008 Chevrolet Camaro
2000-2008 Chevrolet Lumina
2000-2008 Chevrolet Cavalier
2000-2003 Chevrolet Impala
2000-2003 Chevrolet Malibu
2000-2003 Chevrolet Monte Carlo
2000-2003 Chevrolet Silverado
2000-2003 Chevrolet Suburban
2000-2003 Chevrolet Tahoe
2000-2003 Chevrolet Venture
2001-2008 Chevrolet Express
2002-2008 Chevrolet Astro
2000-2003 Chevrolet Avalanche
2000-2003 Chevrolet Trailblazer
2003-2008 Chevrolet Blazer
2003-2008 Chevrolet S-10
2003-2008 Chevrolet Trailblazer EXT
2000-2008 Chevrolet Factory Service Bulletin OBDII Code P1174

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P1174 Chevrolet Description

The Fuel Trim Cylinder Balance diagnostic detects a rich or lean cylinder to cylinder air/fuel ratio imbalance in each bank. The diagnostic monitors the pre-catalyst heated oxygen sensor (HO2S) signal's frequency and amplitude characteristics by calculating an accumulated voltage over a predetermined sample period. An imbalance is indicated when multiple samples of the accumulated voltage are consistently higher than the desired value.
OBDII Code P1174 Chevrolet - Fuel Trim Cylinder Balance Bank 1 - AutoCodes.com

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Related Information

P1174 CHEVROLET Comments

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