Conditions for Running the DTC

WARNING: This page is about a different car, the 2009 Pontiac Torrent and 2009 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.

P2177 or P2179

Before the ECM can report DTC P2177 or P2179 failed, DTCs P000A, P000B, P000C, P000D, P0008, P0009, P0010, P0011, P0013, P0014, P0016, P0017, P0018, P0019, P0020, P0021, P0023, P0024, P0101, P0121, P0122, P0123, P0133, P0153, P0201, P0202, P0203, P0204, P0205, P0206, P0221, P0222, P0223, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0335, P0336, P0338, P0443, P0458, P0459, P0461, P0462, P0463, P2068 P2088, P2089, P2090, P2091, P2092, P2093, P2094, and P2095 must run and pass.
The engine load is between 13-40 percent.
The engine speed is between 1,200-3,340 RPM.
The throttle angle is less than 100 percent.
The intake air temperature (IAT) is colder than 61°C (142°F).
The Closed Loop fuel control is enabled.
The engine is not in decel fuel cut-off (DFCO).
The calculated amount of fuel metered into the engine is greater than 700 grams.
DTC P2177 and P2179 run continuously when the above conditions are met for approximately 300 seconds, after Closed Loop fuel control is enabled.

P2187 or P2189

Before the ECM can report DTC P2187 or P2189 failed, DTCs P000A, P000B, P000C, P000D, P0008, P0009, P0010, P0011, P0013, P0014, P0016, P0017, P0018, P0019, P0020, P0021, P0023, P0024, P0101, P0121, P0122, P0123, P0133, P0153, P0201, P0202, P0203, P0204, P0205, P0206, P0221, P0222, P0223, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0335, P0336, P0338, P0443, P0458, P0459, P0461, P0462, P0463, P2068 P2088, P2089, P2090, P2091, P2092, P2093, P2094, and P2095 must run and pass.
The engine load is between 0-24 percent.
The engine speed is between 519-1,001 RPM.
The throttle angle is less than 100 percent.
The cold start fuel control is not active.
The Closed Loop fuel control is enabled.
The engine coolant temperature (ECT) is warmer than 60°C (140°F).
The intake air temperature (IAT) is colder than 61°C (142°F).
The engine is not in DFCO.
The calculated amount of fuel metered into the engine is greater than 700 grams.
DTCs P2187 and P2189 run continuously when the above conditions are met for approximately 300 seconds, after Closed Loop fuel control is enabled.