DTC P171C

DTC P171C: Park Pawl System Multiple Sensor Correlation

General Description

Courtesy of HONDA, U.S.A., INC.

The park pawl actuator driver unit controls shifting/releasing of the park pawl actuator to/from the P position. If the P position state detected by the park pawl actuator driver unit is different from the P position information detected by the park position sensor that is transmitted from the powertrain control module (PCM) when shifting to/releasing from P position is complete, the PCM receives malfunction from the park pawl actuator driver unit, and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type

Execution	-
Sequence	None
Duration	40 milliseconds or more
DTC Type	One drive cycle, MIL on, Shift position indicator blinks

Enable Conditions

Condition
12 volt battery voltage [Battery Voltage]	10.5 V
Vehicle	ON mode
Other	No abnormal condition in the communication via EPP-CAN

Malfunction Threshold

The P position state detected by the park pawl actuator driver unit continues to differ from the P position information detected by the park position sensor for 40 milliseconds or more.

Possible Cause

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.

Park mechanism failure

Confirmation Procedure

Operating Condition

Turn the vehicle to the ON mode, and wait for at least 10 seconds.
While pressing the brake pedal, shift to N position/mode, then shift to P position/mode and wait at least 5 seconds.

With the HDS

None.

Diagnosis Details

Conditions for setting the DTC

When a malfunction is detected, the MIL comes on, the shift position indicator blinks and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the PCM memory.

Conditions for clearing the DTC

The shift position indicator comes off by turning the vehicle to the OFF (LOCK) mode. The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs the MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the 12 volt battery.