C2171

DTC C2171

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.



DTC Descriptor
DTC C2171
- Low Tire Pressure Sensors Not Learned - Main




Circuit/System Description

The tire pressure monitor (TPM) system has a radio frequency (RF) transmitting pressure sensor in each wheel/tire assembly. The module receives and translates the data contained in the tire pressure sensor RF transmissions into sensor presence, sensor mode, and tire pressure.


The receiver module receives a radio frequency (RF) transmission from each tire pressure sensor. Each sensor RF transmission contains its own unique identification (ID) code that must be learned into the module memory. Once all 4 IDs have been learned, the module continuously compares IDs received in transmission to its learned IDs to determine if all 4 sensors are present.


Conditions for Running the DTC

The ignition is ON.


Conditions for Setting the DTC

Tire Pressure Sensor ID code is not learned.


Action Taken When the DTC Sets

The Tire Pressure Warning Light is illuminated.


Conditions for Clearing the DTC

A current DTC will clear when the Tire Pressure Control Module has undergone the sensor learn procedure.


Reference Information
Description and Operation

Tire Pressure Monitor Description and Operation (Description and Operation)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Control Module References (Programming and Relearning) for Scan Tool Information


Circuit/System Verification

Verify that the Sensor ID's are learned.

If the ID's are not learned, program/setup the Tire Pressure Control Module. If the DTC resets, replace the Tire Pressure Control Module.



Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Tire Pressure Sensor Learn (Programming and Relearning)
* Control Module References (Programming and Relearning) for Module replacement, setup, and programming