DTC P281D (CVT)

WARNING: This page is about a different car, the 2022 Honda Accord, 2021 Honda Accord, 2020 Honda Accord, 2019 Honda Accord, and 2018 Honda Accord. However, it is still accessible from the selected car via links, so may be relevant.

DTC P281D: Shift Solenoid Valve O/P (Pressure Control Solenoid H) Control Circuit Low

General Description

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

Transmission fluid pump volume changes by shift solenoid valve O/P ON/OFF control

Transmission fluid pump volume	Shift Solenoid Valve O/P
High	OFF
Low	ON

The shift solenoid valve O/P controls the drain circuit close/open commanded by the transmission control module (TCM) ON/OFF commands. The transmission fluid pump volume is changed by switching the shift solenoid valve O/P ON/OFF control. The TCM commands the driver circuit to turn on the shift solenoid valve O/P. The circuit diagnoses malfunctions such as a circuit short or open, and sends back a return signal during the TCM's command. When the return signal does not match the TCM command to turn ON the shift solenoid valve O/P, the TCM detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type

Execution	Continuous
Sequence	None
Duration	1 second or more
DTC Type	One drive cycle, MIL off, Shift position indicator blinks

Enable Conditions

Condition	Minimum	Maximum
12 volt battery voltage [Battery Voltage]	10.0 V	-

[ ]: HDS Parameter

Malfunction Threshold

The return signal does not match the command to turn ON shift solenoid valve O/P [Shift Sol O/P] for at least 1 second.

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.

Shift solenoid valve O/P SOL C line short to ground
Shift solenoid valve O/P internal circuit short
TCM internal circuit failure

Confirmation Procedure

Operating Condition

Start the engine.
Shift the transmission to D position/mode while pressing the brake pedal, and wait for at least 30 seconds.

With the HDS

None.

Diagnosis Details

Conditions for setting the DTC

When a malfunction is detected, the shift position indicator blinks and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the TCM memory. The MIL does not come on.

Conditions for clearing the DTC

The shift position indicator comes off by turning the vehicle to the OFF (LOCK) mode. The Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command.