P1406 OBD Trouble Code

1 result found

P1406 - GM
Type Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled

EGR Valve Pintle Position Circuit Conditions


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

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