P2176

DTC P2176

Diagnostic Instructions
^ Perform the [Diagnostic System Check - Vehicle Diagnostic Information] prior to using this diagnostic procedure. Diagnostic System Check - Vehicle Diagnostic Information
^ Review [Strategy Based Diagnosis] for an overview of the diagnostic approach. Strategy Based Diagnosis
^ [Diagnostic Procedure Instructions - Vehicle Diagnostic Information] provides an overview of each diagnostic category. Diagnostic Procedure Instructions - Vehicle Diagnostic Information

DTC Descriptors
DTC P2176 Minimum Throttle Position Not Learned

Circuit/System Description
The engine control module (ECM) controls the throttle valve by applying a varying voltage to the throttle actuator control (TAC) motor. The ECM monitors the actual throttle valve position using throttle position (TP) sensor 1 and 2.

Conditions for Running the DTC
^ The engine speed is less than 40 RPM.
^ The vehicle speed is 0 km/h (0 mph).
^ The engine coolant temperature (ECT) is between 5-100° C (41-212° F).
^ The intake air temperature (IAT) is between 5-143° C (41-290° F).
^ The accelerator pedal position (APP) sensor angle is less than 15 percent.
^ The ignition voltage is more than 10 volts.
^ DTC P2176 runs continuously once the above conditions are met for more than 1 second.

Conditions for Setting the DTC
^ The ECM detects that the TP sensor 1 voltage is not between 4.1-4.6 volts during the throttle learn procedure.
^ The ECM detects that the TP sensor 2 voltage is not between 0.3-1.0 volts during the throttle learn procedure.
^ The minimum throttle position is not learned after an ECM replacement.

Action Taken When the DTC Sets
DTC P2176 is a Type A DTC.

Conditions for Clearing the DTC
DTC P2176 is a Type A DTC.

Circuit/System Verification
1. Ignition ON, rapidly depress the accelerator pedal from the rest position to the wide open throttle position (WOT) and release the pedal. Repeat the procedure several times. Observe the DTC information with a scan tool. Verify that DTCs P0121, P0122, P0123, P0221, P0222, P0223, P0638, or P2101 do not set.
^ If any of the above DTCs set, refer to [Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Information] [DTC P0121, P0122, P0123, P0221, P0222, or P0223]. Diagnostic Trouble Code (DTC) List - Vehicle

2. DTC P2176 is an informational DTC. Perform the idle learn procedure, refer to [Idle Learn]. Service and Repair
^ If DTC P2176 resets after performing the idle learn procedure, replace the throttle body.

3. If the vehicle passes the Circuit/System Verification Test, then operate the vehicle within the conditions for running the DTC. You may also operate the vehicle within the conditions that are captured in the Freeze Frame/Failure Records List.

Repair Instructions
Perform the [Diagnostic Repair Verification - Vehicle Diagnostic Information] after completing the diagnostic procedure. Diagnostic Repair Verification - Vehicle Diagnostic Information
[Throttle Body Assembly Replacement]