P1174 on Chevrolet

On Chevrolet and Saturn, fuel trim shows a cylinder balance problem on bank 1

Severity not verified — if the car runs badly, have it inspected

The GM bulletins tie it to injector concerns and driveability symptoms, but none we read rates how urgent it is.

It gets more serious if:

  • Inspect soon: Get it inspected soon if the engine misfires, hesitates or loses power.

Source: how we rate severity

This page covers only what differs on Chevrolet. For what P1174 means, the ranked causes and the test order, see the P1174 guide.

What's different on Chevrolet

Chevrolet

  • 2006–2007 · Malibu

    Supported by vehicle data

    GM bulletin PIP4017C tells dealers to test injectors for P1174 on the 2006 to 2007 Malibu.

  • 2007–2008 · Tahoe

    Supported by vehicle data

    GM bulletin 070604027 covers clogged injectors on 5.3L Tahoe, Suburban and Silverado with P1174 and P1175.

  • PIP4017CStatus unverified

    Fuel injector concern that could set P1174

    2006–2007malibu · issued · NHTSA 10161013

    GM preliminary information telling dealers to test the fuel injectors with the Active Fuel Injector Tester tool when P1174 is set. Also lists Pontiac G6 and Solstice and Saturn Sky, Vue and Aura.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

  • 070604027Status unverified

    5.3L driveability symptoms and clogged injectors with P1174 and P1175

    2007–2008tahoe, suburban, silverado-1500 · issued · NHTSA 10023215

    Covers hesitation, misfire and lack of power on 5.3L engines from clogged fuel injectors, with fuel trim and cylinder balance codes including P1174 and P1175.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

Sources and review

  1. Chevrolet PIP4017C: Fuel injector concern that could set P1174 — NHTSA manufacturer communications ,
  2. Chevrolet 070604027: 5.3L driveability symptoms and clogged injectors with P1174 and P1175 — NHTSA manufacturer communications ,
Last reviewed
Written by
Saurabh K.
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