DTC P0100, P0101, P0102, or P0103 (LPL or LPV)
Diagnostic Instructions
DTC Descriptors
| DTC P0100: Mass Air Flow (MAF) Sensor
Circuit |
| DTC P0101: Mass Air Flow (MAF) Sensor
Performance |
| DTC P0102: Mass Air Flow (MAF) Sensor Circuit
Low Voltage |
| DTC P0103: Mass Air Flow (MAF) Sensor Circuit
High Voltage |
Diagnostic Fault Information
Circuit
|
Short to Ground
|
Open/High Resistance
|
Short to Voltage
|
Signal Performance
|
Ignition Voltage
|
P0102
|
P0102
|
-
|
P0100, P0101
|
Signal
|
P0102
|
P0102
|
P0103
|
P0100, P0101
|
Ground
|
-
|
P0102
|
-
|
P0100, P0101
|
|
| |
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, greater 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 battery voltage is greater
than 8.5 V |
| • |
The engine speed is between 1
000-4 000 RPM |
Conditions for Setting the DTC
The ECM detects the MAF signal circuit is open, shorted to
ground, or shorted to a voltage for less than 1 s.
Action Taken When the DTC Sets
DTCs P0101, P0102 and P0103 are Type B DTCs.
Conditions for Clearing the DTC
DTCs P0101, 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: |
| • |
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
Connector End View Reference
Component Connector End Views
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
| 1. |
Engine running for 60 s,
observe the DTC information with a scan tool. DTCs P0100, P0101,
P0102 and P0103 should not set. |
| 2. |
Operate the vehicle within the
Conditions for Running the DTC to verify the DTC does not reset.
You may also operate the vehicle within the conditions that you
observed from the Freeze Frame/Failure Records data. |
Circuit/System Testing
| 1. |
Ignition OFF, disconnect the
harness connector at the B75B Mass Air Flow/Intake Air Temperature
Sensor. |
| 2. |
Test for less than 5 Ω
between the earth circuit terminal 2 and earth. |
| ⇒ |
If greater than the specified range, test the
ground circuit for an open/high resistance. |
| 3. |
Ignition ON, test for greater
than 11 V voltage between the ignition circuit terminal 4 and
ground. |
| ⇒ |
If less than the specified range, test the
ignition circuit for a short to ground or an open/high resistance.
If the circuit tests normal and the ignition circuit fuse is open,
test all the components connected to the ignition circuit and
replace as necessary. |
| 4. |
Test for 4.8-5.2 V between the
signal circuit terminal 5 and ground. |
| ⇒ |
If less than the specified range, test the signal
circuit for an open/high resistance or a short to ground. If the
circuit tests normal, replace the K20 Engine Control Module. |
| ⇒ |
If greater than the specified range, test the
signal circuit for a short to voltage. If the circuit tests normal,
replace the K20 Engine Control Module. |
| 5. |
If all circuits test normal,
replace the B75B Mass Air Flow/Intake Air Temperature
Sensor. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
|
