2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1044
DTC P0102
- Mass Air Flow (MAF) Sensor Circuit Low Frequency
DTC P0103
- Mass Air Flow (MAF) Sensor Circuit High Frequency
Diagnostic Fault Information
Circuit/System Description
The mass air flow (MAF) sensor is located in the air intake duct. The MAF sensor is an airflow meter that measures the amount of air that enters the
engine. The MAF sensor uses a hot film that is cooled by air flowing past the sensing film as air enters the engine. The amount of cooling is
proportional to the amount of the air flow. As the air flow increases, more current is required in order to maintain the hot film at a constant
temperature. The engine control module (ECM) uses the MAF sensor in order to provide the correct fuel delivery for all operating conditions.
Conditions for Running the DTC
* The ignition is ON, or the engine is operating.
* The ignition voltage is greater than 10 V.
* DTC P0100, P0102 and P0103 run continuously once the above conditions are met for 1 s.
Conditions for Setting the DTC
P0100
The ECM detects that the MAF sensor signal is 0.0 Hz.
P0102
The ECM detects that the MAF sensor signal is less than 1135 Hz.
P0103
The ECM detects that the MAF sensor signal is greater than 15,152 Hz.
Action Taken When the DTC Sets
DTCs P0100, P0102, and P0103 are Type B DTCs.
Conditions for Clearing the DTC
DTCs P0100, P0102, and P0103 are Type B DTCs.
Diagnostic Aids
* Inspect the harness of the MAF sensor to verify that it is not routed too close to the following components:
- The secondary ignition wires or coils
- Any solenoids
- Any relays
- Any motors
* Inspect the hydro-carbon (HC) absorber, if equipped, in the air cleaner assembly for ruptures that would leak charcoal into the air intake,
contaminating the sensing element.
* Inspect for any contamination, water intrusion, or debris on the sensing elements of the MAF sensor. If debris is present, clean the sensor. If
the sensor cannot be cleaned, replace the sensor.
* A high resistance may cause a driveability concern before this DTC sets.
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)
