DTC P171E

DTC P171E: Park Pawl System Malfunction of learning mode

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. The park pawl actuator driver unit performs the initial learning according to the command from the powertrain control module (PCM). If the initial learning of the park pawl actuator driver unit does not complete for a specified length of time or more after an initial learning command is output from the PCM, 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	2.3 seconds or more
DTC Type	One drive cycle, MIL on, Shift position indicator blinks

Enable Conditions

Condition	Minimum	Maximum
12 volt battery voltage [Battery Voltage]	10.5 V	-
Vehicle	ON mode

[ ]: HDS Parameter

Malfunction Threshold

The initial learning of the park pawl actuator driver unit continues to be performed for 2.3 seconds 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 pawl actuator failure
Park mechanism failure

Confirmation Procedure

Operating Condition

Turn the vehicle to the ON mode, and wait for at least 10 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.