2010 Cadillac Truck SRX AWD V6-3.0L Page 2006

2010 Cadillac Truck SRX AWD V6-3.0L Page 2006

* The long term fuel trim is active.

* The engine coolant temperature (ECT) is greater than 60掳C (140掳F).

* The intake air temperature (IAT) is less than 61掳C (142掳F).

* The evaporative emission (EVAP) canister purge solenoid valve is not enabled.

* The fuel level is greater than 12 %.

* The amount of air flow into the engine is greater than 7,000 g.

* DTC P2177 runs continuously when the above conditions are met for at least 300 s.

P2187

* Before the ECM can report DTC P2187 failed, DTCs P0008, P0009, P0010, P0011, P0013, P0014, P0016, P0017, P0018, P0019, P0020,

P0021, P0023, P0024, P0101, P0121, P0122, P0123, P0133, 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 speed is between 480-1,001 RPM.

* The engine load is between 7-32 %.

* The MAF is between 1-8 g/s.

* The fuel system is in Closed Loop.

* The engine is not in decel fuel cut-off.

* The long term fuel trim is active.

* The engine coolant temperature (ECT) is greater than 60掳C (140掳F).

* The intake air temperature (IAT) is less than 61掳C (142掳F).

* The evaporative emission (EVAP) canister purge solenoid valve is not enabled.

* The fuel level is greater than 12 %.

* The amount of air flow into the engine is greater than 7,000 g.

* DTCs P2187 and P2189 run continuously when the above conditions are met.

Conditions for Setting the DTC

P2177

The Total Fuel Trim Avg. is greater than 23 % for 4 s or for a cumulative of 30 s.

P2187

The Total Fuel Trim Avg. is greater than 40 %, or the long term fuel trim Idle/Decel is greater than 6 %. Either condition exists for 4 s or for a

cumulative of 30 s.

Action Taken When the DTC Sets

DTCs P2177 and P2187 are Type B DTCs.

Conditions for Clearing the MIL/DTC

DTCs P2177 and P2187 are Type B DTCs.

Diagnostic Aids

* A fuel system delivery condition causes this DTC to set. Thoroughly inspect all items that cause a lean condition. Refer to Fuel System

Diagnosis (LF1 China) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Pump/Testing and Inspection/Fuel System

Diagnosis (China))Fuel System Diagnosis (LF1 Except China) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel

Pump/Testing and Inspection/Fuel System Diagnosis (Except China))Fuel System Diagnosis (LAU China) (See: Powertrain

Management/Fuel Delivery and Air Induction/Fuel Pump/Testing and Inspection/Fuel System Diagnosis (China))Fuel System Diagnosis

(LAU Except China) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Pump/Testing and Inspection/Fuel System

Diagnosis (Except China)).

* Any un-metered air into the engine causes this DTC to set. Thoroughly inspect all areas of the engine for vacuum leaks.

* A MAF sensor condition can cause this DTC without setting a MAF DTC. If there is a MAF sensor condition, the MAF sensor parameters

will appear to be within range.

* Inspect the air filter for being the correct one for this application. Make sure that the engine oil fill cap is in place and that it is tight. Verify

that the engine oil dip stick is fully seated.

Reference Information

Schematic Reference

Engine Controls Schematics (LAU) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)Engine Controls Schematics

(LF1) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)

Electrical Information Reference