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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1374 (Engine Controls And Fuel - 4.8L, 5.3L, 6.0L, 6.2L - DTC P0230 To DTC P0690) >> DTC P0420 or P0430 >> Conditions for Running the DTC

Conditions for Running the DTC

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Driving Conditions
    • DTCs P0030, P0031, P0036, P0037, P0038, P0068, P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0120, P0121, P0122, P0123, P0125, P0128, P0130, P0131, P0132, P0133, P0134, P0135, P0136, P0137, P0138, P0140, P0141, P0171, P0172, P0201, P0202, P0203, P0204, P0205, P0206, P0207, P0208, P0220, P0300, P0315, P0326, P0327, P0336, P0340, P0341, P0442, P0446, P0452, P0453, P0455, P0496, P0500 (manual transmission only), P0502, P0506, P0507, P0601, P0602, P0606, P0641, P0722, P0723, P1133, P1134, P1516, P1621, P2135, P2138, P2176 are not set.
    • The engine has been running for greater than 2 minutes.
    • The vehicle has been driven at greater than 1,000 RPM with the mass air flow (MAF) greater than 18 g/s for greater than 30 seconds.
    • The vehicle is in Closed Loop.
    • The vehicle has Fuel Trim Learn enabled.
    • The Engine Coolant Temperature (ECT) parameter is between 45-128°C (113-262°F).
    • The Barometric Pressure (BARO) parameter is greater than 70 kPa.
    • The Catalytic Converter Calculated Temperature parameter is greater than or equal to 420°C (788°F).
    • The Intake Air Temperature (IAT) parameter is between -20 and +85°C (-4 and +185°F).
    • The battery voltage is more than 11 volts.
  2. Idle Conditions
    • The vehicle speed is less than 3.2 km/h (2 mph).
    • For automatic transmissions, the transmission is in Reverse, Drive, or Low.
    • The Throttle Position (TP) parameter is less than 2 percent.
    • The short term fuel trim (FT) is between -10 and +10 percent.
    • This diagnostic attempts one test during each valid idle period until a pass or fail decision has been reached when the above conditions have been met. This diagnostic attempts up to 8 completed tests during each drive cycle.
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