Thread: Another Day, Another Engine Code P1406

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  1. #1 Another Day, Another Engine Code P1406 
    SlyBlackDragon
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    Default 08-30-2014
    "P1406 - GM
    Type Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
    Description
    EGR Valve Pintle Position Circuit Conditions
    Cause
    Engine at idle, then PCM detected these conditions in these tests • Test 1 The EGR sensor input was 0.18v or less • Test 2: The EGR sensor input was 2.06v or higher • Test 3 The maximum change in Desired EGR was less than 0.10v with a signal error over 0.20v for 1 second, or the Desired EGR was 0v with an EGR signal of 0.40v or more, conditions met twice in 10 seconds"

    So...now what?
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  2. #2 Re: Another Day, Another Engine Code P1406 
    Scottydoggs
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    Default 08-30-2014
    new egr valve time, or bad wires to its plug. sometimes you can clean em out with brake cleaner and free up the valve inside.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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