P02E9

DTC P02E9 Intake Air Flow (IAF) Position Sensor Circuit High Voltage

Circuit Description

The intake air flow (IAF) valve position sensor is installed on the IAF valve body together with the control solenoid. The IAF valve position sensor changes output voltage according to IAF valve position. The sensor has the following circuits.

^ 5 volts reference circuit
^ Low reference circuit
^ IAF valve position sensor signal circuit

The IAF valve position sensor provides a signal to the ECM on the signal circuit which is relative to the position changes of the IAF valve. If the ECM detects an excessively high signal voltage this DTC will set.

Condition for Running the DTC

^ DTCs P02E8 P0652 and P0653 are not set.
^ The battery voltage is between 10 to 16 volts.
^ The ignition switch is ON.

Condition for Setting the DTC

^ The ECM detects that the IAF valve position sensor signal voltage is more than 4.9 volts for 1 second.

Action Taken When the DTC Sets

^ The ECM illuminates the MIL when the diagnostic runs and fails. Refer to DTC Type Definitions for Action Taken When the DTC Sets - Type A.
^ The ECM limits fuel injection quantity.
^ The ECM inhibits EGR control.
^ The ECM inhibits turbocharger control.
^ The ECM inhibits DPF regeneration control.
^ The ECM inhibits cruise control.
^ The ECM inhibits PTO control.

Condition for Clearing the DTC

^ Refer to DTC Type Definitions for Condition for Clearing the MIL/DTC - Type A.

Diagnostic Aids

^ If an intermittent condition is suspected refer to Intermittent Conditions in this section.

Circuit/System Testing DTC P02E9