DTC P0606, P1A48, P1A49, P1A4A

DTC P0606: Powertrain Control Module (PCM) Processor Malfunction

DTC P1A48: Powertrain Control Module (PCM) Internal Malfunction (SBW Different Run)

DTC P1A49: Powertrain Control Module (PCM) Internal Malfunction (SBW Parking Position)

DTC P1A4A: Powertrain Control Module (PCM) Internal Malfunction (SBW Display Position)

General Description

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

An abnormal condition is detected based on the correlation between the input signal of the shift by wire (SBW) shifter control module (in) and the position indication/display (out). The SBW control, which is the target of this detection, shifts the shift position/mode only when there is an input from the SBW shifter control module. If the shift position/mode changes with no signal from the SBW shifter control module, the powertrain control module (PCM) detects a malfunction and stores a DTC.

	Representative code	False command of shift position/mode	False command of parking release	False command of displaying position/mode
DTC	P0606*	P1A48	P1A49	P1A4A

*: DTC P0606 is stored when DTC P1A48, P1A49, and/or P1A4A are stored.

Monitor Execution, Sequence, Duration, DTC Type

Execution	Continuous
Sequence	None
Duration	-
DTC Type	One drive cycle, MIL on

Enable Conditions

Condition
Vehicle	ON mode

Malfunction Threshold

DTC: P1A48

One of the conditions is occurred for a specified time:

The shift position/mode command changed from D to R with no signal input from the SBW shifter control module.
The shift position/mode command changed from R to D with no signal input from the SBW shifter control module.
The shift position/mode command changed from R to D while D to R is input from the SBW shifter control module.

DTC: P1A49

The shift position/mode command changed to parking release even when R, N, or D is not input from the SBW shifter control module.

DTC: P1A4A

One of the conditions is occurred for a specified time

The shift position/mode display request changed from D to R with no signal input from the SBW shifter control module.
The shift position/mode display request changed from R to D while D to R is input from the SBW shifter control module.
The shift position/mode display request changed to P while park position sensor signal is not P.

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.

PCM internal circuit failure

Diagnosis Details

Conditions for setting the DTC

When a malfunction is detected, the MIL comes on and a Pending DTC, a Confirmed DTC, the freeze data, and the on-board snapshot are stored in the PCM memory.

Conditions for clearing the DTC

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, the freeze data, and the on-board snapshot can be cleared with the scan tool Clear command or by disconnecting the 12 volt battery.