DTC P0651 (PGM-FI System: 6-Speed A/T, '16-'18 9-Speed A/T)
DTC P0651 : Sensor Reference Voltage B Malfunction
NOTE: Before you troubleshoot, review the general troubleshooting information - Refer to: How to Troubleshoot the Fuel and Emissions Systems, or How to Troubleshoot the A/T System .
| DTC Description | Confirmed DTC | Pending DTC | Freeze Frame |
|---|---|---|---|
| P0651 Sensor Reference Voltage B Malfunction |
DTC (PGM-FI)
- Problem verification
- 1. Turn the vehicle to the ON mode.
- 2. Clear the DTC with the HDS.
- 3. Check for Pending or Confirmed DTCs with the HDS.
DTC Description Confirmed DTC Pending DTC Freeze Frame P0651 Sensor Reference Voltage B Malfunction Is DTC P0651 indicated?
YES
The failure is duplicated. Go to step 2.
NO
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the PCM and these parts. 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 - Refer to: How to Troubleshoot the Fuel and Emissions Systems, or How to Troubleshoot the A/T System .
- APP sensor
- Throttle body
- Rocker arm oil pressure sensor
- Input shaft (mainshaft) speed sensor (6-speed automatic transmission)
- Determine possible failure area (VCC lines, others)
- 1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Disconnect the following connectors.
APP sensor 6P connector Throttle body 6P connector Rocker arm oil pressure sensor 3P connector Input shaft (mainshaft) speed sensor 3P connector (6-speed automatic transmission) - 3. Turn the vehicle to the ON mode.
- 4. Clear the DTC with the HDS.
- 5. Check for Pending or Confirmed DTCs with the HDS.
DTC Description Confirmed DTC Pending DTC Freeze Frame P0651 Sensor Reference Voltage B Malfunction Is DTC P0651 indicated?
YES
Go to step 4.
NO
Go to step 3.
- Shorted part check
- 1. Check for Pending or Confirmed DTCs with the HDS while reconnecting these parts, one at a time:
- APP sensor
- Throttle body
- Rocker arm oil pressure sensor
- Input shaft (mainshaft) speed sensor (6-speed automatic transmission)
DTC Description Confirmed DTC Pending DTC Freeze Frame P0651 Sensor Reference Voltage B Malfunction Is DTC P0651 indicated?
YES
Replace the part that caused the DTC when it was reconnected.
NO
Check for poor connections or loose terminals at the PCM and the following parts, then go to step 1.
- APP sensor
- Throttle body
- Rocker arm oil pressure sensor
- Input shaft (mainshaft) speed sensor (6-speed automatic transmission)
- Shorted wire check (VCC lines)
- 1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Jump the SCS line with the HDS, and wait more than 1 minute.
- 3. Disconnect the following connectors.
PCM connector A (51P) PCM connector B (51P) - 4. Check for continuity between these test points and body ground individually.
Test condition Vehicle OFF (LOCK) mode APP sensor 6P connector: disconnected Throttle body 6P connector: disconnected Rocker arm oil pressure sensor 3P connector: disconnected Input shaft (mainshaft) speed sensor 3P connector (6-speed automatic transmission) PCM connector A (51P): disconnected PCM connector B (51P): disconnected Connector Terminal PCM connector A (51P) - Refer to:
PCM Connector for Inputs and Outputs (16-20 6-Speed A/T), or
PCM Connector for Inputs and Outputs (16-18, 9-Speed A/T)No. 42 PCM connector B (51P) - Refer to:
PCM Connector for Inputs and Outputs (16-20 6-Speed A/T), or
PCM Connector for Inputs and Outputs (16-18, 9-Speed A/T)No. 43 and No. 44 Is there continuity?
YES
Repair a short in the VCC wire between the PCM (A41, B43, or B44) and each part that was disconnected in step 2.
NO
The VCC wires are OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting or substitute a known-good PCM - Refer to: PCM Removal and Installation (6-Speed A/T, 16-18 9-Speed A/T) .