P0629 · Manufacturer communications

JEEP · 2025-06-25

Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician must find one or more of the following Diagnostic Trouble Codes (DTCs) have been set: ● U0168 - Lost Communication With Vehicle Security Control Module. ● P0629 - Fuel Pump Control Circuit High. ● P0171 - Fuel system Lean. ● P0087 - Fuel Rail Pressure Too Low - Bank 1. Customers may also experience one or more of the following: ● Vehicle not starting. ● Variable speed fuel pump doesn't start after refueling. ● The Instrument Panel Cluster (IPC) unable to calculate the instantaneous fuel economy under heavy acceleration. ● The oxygen sensor can give incorrect values when entering Electric Vehicle (EV) mode. False fault detection…

JEEP · 2025-05-18

"Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P0629 - Fuel Pump Control Circuit High. ● P0171 - Fuel system Lean. ● P0087 - Fuel Rail Pressure Too Low – Bank 1. ● P16F0-00 - SPI Comm Hardware Fault. Customers may also experience one or more of the following: ● **Engine No Start.** ● The rear shafts can be damaged from pressing the accelerator while in gear with the Electronic Parking Brake (EPB) applied. ● Oxygen sensors can give wrong values entering EV mode. False fault detection is possible. ● The Instrument Panel Cluster (IPC) is unable to calculate the instantaneous fuel economy when under heavy acceleration. ●…

JEEP · 2025-04-30

"Flash: Powertrain Control Module (PCM) Updates. Customers must experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician must find one or more of the following Diagnostic Trouble Codes (DTCs) have been set: ● **U0168 - Lost Communication With Vehicle Security Control Module.** ● P0629 - Fuel Pump Control Circuit High. ● P0171 - Fuel system Lean. ● P0087 - Fuel Rail Pressure Too Low - Bank 1. Customers may also experience one or more of the following: ● **Vehicle not starting.** ● Variable speed fuel pump doesn't start after refueling. ● The Instrument Panel Cluster (IPC) unable to calculate the instantaneous fuel economy under heavy acceleration. ● The oxygen sensor can give incorrect values when entering Electric Vehicle (EV) mode. False fault…

JEEP · 2025-03-28

"Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician must find one or more of the following Diagnostic Trouble Codes (DTC)s have been set: ● P0629 - Fuel Pump Control Circuit High. ● P0171 - Fuel system Lean. ● P0087 - Fuel Rail Pressure Too Low - Bank 1. Customers may also experience one or more of the following: ● Variable speed fuel pump doesn't start after refueling. ● The Instrument Panel Cluster (IPC) unable to calculate the instantaneous fuel economy under heavy acceleration. ● The oxygen sensor can give incorrect values when entering Electric Vehicle (EV) mode. False fault detection is possible when this event occurs. ● The rear half shafts are damaged due to…

JEEP · 2024-10-23

"Flash: Powertrain Control Module (PCM) Updates Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes (DTCs) has been set: ● P0629 - Fuel Pump Control Circuit High. ● P0171 - Fuel system Lean. ● P0087 - Fuel Rail Pressure Too Low - Bank 1. Customers may experience one or more of the following: ● Vehicle will not start. ● The Instrument Cluster Panel (ICP) unable to calculate the instantaneous fuel economy under heavy acceleration. ● The oxygen sensor can give incorrect values when entering EV mode. False fault detection (MIL on) is possible when this event occurs. ● The rear half shafts are damaged due to accelerating in drive with the Electronic Parking Brake (EPB)…

JEEP · 2024-09-14

"Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician must find one or more of the following Diagnostic Trouble Codes (DTC)s have been set: ● P0629 - Fuel Pump Control Circuit High. ● P0171 - Fuel system Lean. ● P0087 - Fuel Rail Pressure Too Low - Bank 1. Customers may also experience the following: ● Vehicle will not start. ● The Instrument Cluster Panel (ICP) unable to calculate the instantaneous fuel economy under heavy acceleration. ● The oxygen sensor can give incorrect values when entering EV mode. False fault detection (MIL on) is possible when this event occurs. ● The rear half shafts are damaged due to accelerating in drive with the Electronic Parking Brake (EPB)…

JEEP · 2024-09-07

"Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician must find one or more of the following Diagnostic Trouble Codes (DTCs) have been set: ● **P0629 - Fuel Pump Control Circuit High. ● P0171 - Fuel system Lean. ● P0087 - Fuel Rail Pressure Too Low - Bank 1.** ● P16F0-00 - SPI Comm Hardware Fault. Customers may also experience one or more of the following: ● **The rear half shafts are damaged due to pressing the accelerator in drive with the Electric Parking Brake (EPB) applied. ● The Oxygen Sensor (02) can give wrong values when entering EV mode, triggering a false MIL. ● The Instrument Cluster Panel (ICP) unable to calculate the instantaneous fuel economy under heavy…

SATURN · 2005-08-01

CRANK, NO START OR EXTENDED CRANK PRIOR TO VEHICLE START OR INOPERATIVE, INTERMITTENT OPERATION OF COMPONENTS AND/OR DIAGNOSTIC TROUBLE CODES (DTC) P0112, P0646, P0629, P0693, AND P0571 IN ELECTRONIC CONTROL UNIT (ECU). *TT

SATURN · 2005-08-01

CRANK/NO START/EXTENDED CRANK (3 SECONDS OR GREATER) PRIOR TO VEHICLE START, DELAY INTO REVERSE, INOPERATIVE/INTERMITTENT OPERATION OF COMPONENTS AND/OR DIAGNOSTICS TROUBLE CODES (DTC) P0621, P0300-P0306, P0571, P0112, P0629, P0693, U2105, U2108, U1088, AND U1096 IN ELECTRONIC CONTROL UNIT (ECU). *TT

SATURN · 2004-10-01

CRANK NO START, HARD START, STALLING, OR FRONT LAMPS INTERMITTENTLY INOPERATIVE SETTING ANY OF THE FOLLOWING DIAGNOSTIC TROUBLE CODES (DTCS) - P0629, B2752, B3722, N3717, B2717, B2600, B2722. *TT