P0651 (A/T)

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 P0651 : Sensor Reference Voltage 2 Circuit Malfunction

NOTE: Before you troubleshoot, review the General Troubleshooting Information .

DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
P0651 Sensor Reference Voltage 2 Circuit Malfunction

DTC (A/T)

Problem verification

-1. Turn the vehicle to the ON mode.

-2. Clear the DTC with the HDS.

-3. Turn the vehicle to the OFF (LOCK) mode.

-4. Turn the vehicle to the ON mode.

-5. Check for Pending or Confirmed DTCs with the HDS.

DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
P0651 Sensor Reference Voltage 2 Circuit Malfunction

Is DTC P0651 indicated?

YES

The failure is duplicated. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good TCM , then recheck. If this DTC goes away and the TCM was substituted, replace the original TCM .

Intermittent failure, the system is OK at this time. Check for poor connections and loose terminals at the TCM. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot.