DTC P0641 (PGM-FI System (2.4 L Engine)) (2017 2018 2019)
DTC P0641 : Sensor Reference Voltage A Malfunction
NOTE: Before you troubleshoot, review the general troubleshooting information .
| DTC Description | Confirmed DTC | Pending DTC |
|---|---|---|
| P0641 Sensor Reference Voltage A 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 P0641 Sensor Reference Voltage A Malfunction Is DTC P0641 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.
- MAP sensor
- Fuel rail pressure sensor
- CVT drive pulley speed sensor
- APP sensor
- A/C pressure sensor
- FTP sensor (USA models)
- Determine possible failure area (VCC lines, others)
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Disconnect the following connectors.
MAP sensor 3P connector Fuel rail pressure sensor 3P connector CVT drive pulley speed sensor 3P connector APP sensor 6P connector A/C pressure sensor 3P connector FTP sensor 3P connector (USA models) -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 P0641 Sensor Reference Voltage A Malfunction Is DTC P0641 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:
- MAP sensor
- Fuel rail pressure sensor
- CVT drive pulley speed sensor
- APP sensor
- A/C pressure sensor
- FTP sensor (USA models)
DTC Description Confirmed DTC Pending DTC P0641 Sensor Reference Voltage A Malfunction Is DTC P0641 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.
- MAP sensor
- Fuel rail pressure sensor
- CVT drive pulley speed sensor
- APP sensor
- A/C pressure sensor
- FTP sensor (USA models)
- Shorted wire check (VCC lines to power)
-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 C (51P) -4. Turn the vehicle to the ON mode.
-5. Measure the voltage between these test points and body ground individually.
Test condition Vehicle ON mode MAP sensor 3P connector: disconnected Fuel rail pressure sensor 3P connector: disconnected CVT drive pulley speed sensor 3P connector: disconnected APP sensor 6P connector: disconnected A/C pressure sensor 3P connector: disconnected FTP sensor 3P connector: disconnected (USA models) PCM connector A (51P): disconnected PCM connector C (51P): disconnected Connector Terminal PCM connector A (51P) No. 29 and No. 31 PCM connector C (51P) No. 41 Is there any voltage?
YES
Repair a short to power in the VCC wire between the PCM (A29, A31, or C41) and each part that was disconnected in step 2.
NO
Go to step 5.
- Shorted wire check (VCC lines to ground)
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Check for continuity between these test points and body ground individually.
Test condition Vehicle OFF (LOCK) mode MAP sensor 3P connector: disconnected Fuel rail pressure sensor 3P connector: disconnected CVT drive pulley speed sensor 3P connector: disconnected APP sensor 6P connector: disconnected A/C pressure sensor 3P connector: disconnected FTP sensor 3P connector: disconnected (USA models) PCM connector A (51P): disconnected PCM connector C (51P): disconnected Connector Terminal PCM connector A (51P) No. 29 and No. 31 PCM connector C (51P) No. 41 Is there continuity?
YES
Repair a short in the VCC wire between the PCM (A29, A31, or C41) 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 .