DTC P0651
DTC P0651 : Sensor Reference Voltage B Malfunction
NOTE: Before you troubleshoot, review the general troubleshooting information .
| 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 :
- APP sensor
- A/C pressure sensor
- EGR valve
- CVT driven pulley pressure sensor (CVT model)
- CVT speed sensor (CVT model)
- Torque converter turbine speed sensor (CVT model)
- Neutral position sensor (M/T model)
- FTP sensor (USA and Canada models)
- Rocker arm oil pressure sensor (Mexico models CVT)
- 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
- A/C pressure sensor 3P connector
- EGR valve 5P connector
- CVT driven pulley pressure sensor 3P connector (CVT model)
- CVT speed sensor 3P connector (CVT model)
- Torque converter turbine speed sensor 3P connector (CVT model)
- Neutral position sensor 4P connector (M/T model)
- FTP sensor 3P connector (USA and Canada models)
- Rocker arm oil pressure sensor 3P connector (Mexico models CVT)
-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:
Check for Pending or Confirmed DTCs with the HDS while reconnecting these parts, one at a time:
- APP sensor
- A/C pressure sensor
- EGR valve
- CVT driven pulley pressure sensor (CVT model)
- CVT speed sensor (CVT model)
- Torque converter turbine speed sensor (CVT model)
- Neutral position sensor (M/T model)
- FTP sensor (USA and Canada models)
- Rocker arm oil pressure sensor (Mexico models CVT)
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
- A/C pressure sensor
- EGR valve
- CVT driven pulley pressure sensor (CVT model)
- CVT speed sensor (CVT model)
- Torque converter turbine speed sensor (CVT model)
- Neutral position sensor (M/T model)
- FTP sensor (USA and Canada models)
- Rocker arm oil pressure sensor (Mexico models CVT)
- Shorted wire check (VCC lines)
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Jump the SCS line with the HDS.
-3. Disconnect the following connector.
PCM connectors A (51P) PCM connectors B (51P) -4. Check for continuity between the appropriate PCM connector terminal and body ground individually (see table).
Test condition Vehicle OFF (LOCK) mode APP sensor 6P connector: disconnected A/C pressure sensor 3P connector: disconnected EGR valve 5P connector: disconnected CVT driven pulley pressure sensor 3P connector (CVT model): disconnected CVT speed sensor 3P connector (CVT model): disconnected Torque converter turbine speed sensor 3P connector (CVT model): disconnected Neutral position sensor 4P connector (M/T model): disconnected FTP sensor 3P connector (USA and Canada models): disconnected Rocker arm oil pressure sensor 3P connector (Mexico models CVT): disconnected PCM connector A (51P): disconnected PCM connector B (51P): disconnected Connector Terminal PCM connector A (51P) No. 37 PCM connector B (51P) No. 29 Is there continuity?
YES
Repair a short in the VCC wire between the PCM (A37 or B29) and each part that was disconnected in step 2.
NO
Update the PCM if it does not have the latest software, or substitute a known-good PCM , then recheck. If DTC P0651 goes away and the PCM was updated, troubleshooting is complete. If DTC P0651 goes away and the PCM was substituted, replace the original PCM .