DTC P008B-00: Low Pressure Fuel System Pressure - Too High [12/2019 - 10/2022]: Procedure

1. Read the DTCs.

   Powertrain > Engine > Trouble Codes 

   Result

   Result	Proceed to
   DTC P008B-00 is output	A
   DTC P008B-00 and other DTCs are output	B

   HINT: 

   If any DTCs other than P008B-00 are output, troubleshoot those DTCs first.

Result: 

B 

GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2019 - 09/2020]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [09/2020 - 10/2021]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2021 - 10/2022] 

Result: 

A 

See step  2

1. Start the engine.
2. Record the Fuel Pressure (Low) / Fuel Pressure 2 value.

   Powertrain > Engine > Data List 

   Tester Display
   Fuel Pressure (Low) / Fuel Pressure 2

3. Turn the ignition switch off.
4. Discharge the fuel pressure.

   HINT: 

   DTCs may be stored during this inspection. Check for DTCs and clear them using the GTS.

   1. Remove the FUEL PMP fuse from the No. 1 engine room relay block and No. 1 junction block assembly.
   2. Start the engine.
   3. After the engine has stopped on its own, turn the ignition switch off.

      HINT: 

      If the engine does not stop naturally, perform direct injection by racing the engine to reduce the fuel pressure [Fuel Pressure (High)] and stop the engine.

   4. Crank the engine again and make sure that the engine does not start.
   5. Install the FUEL PMP fuse.
5. Compare the Fuel Pressure (Low) / Fuel Pressure 2 value recorded with the engine running to the Fuel Pressure (Low) / Fuel Pressure 2 value currently shown on the GTS.

   Powertrain > Engine > Data List 

   Tester Display
   Fuel Pressure (Low) / Fuel Pressure 2

   Result

   Result	Proceed to
   Fuel Pressure (Low) / Fuel Pressure 2 value drops	A
   Fuel Pressure (Low) / Fuel Pressure 2 value is maintained	B

   HINT: 

   Perform "Inspection After Repair" after replacing the fuel pressure sensor (for low pressure side).

   Refer to INITIALIZATION [12/2019 - 10/2022]

Result: 

B 

REPLACE FUEL DELIVERY PIPE WITH SENSOR ASSEMBLY. Refer to  REMOVAL [12/2019 - 10/2022] 

Result: 

A 

See step  3

1. Install the fuel pressure gauge (for low pressure line of low pressure side).

   Refer to PROCEDURE - Step 2

2. Compare the values in the Data List using the GTS and the fuel pressure gauge when the Active Test was performed.

   Powertrain > Engine > Active Test 

   Active Test Display
   Control the Fuel Pump Duty Ratio

   Data List Display
   Fuel Pressure (Low) / Fuel Pressure 2

   Standard

   GTS Operation	Standard
   Low	Data List value and fuel pressure gauge are within +/-50 kPa of each other
   High

   HINT: 

   Perform "Inspection After Repair" after replacing the fuel pressure sensor (for low pressure side).

   Refer to INITIALIZATION [12/2019 - 10/2022]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE FUEL DELIVERY PIPE WITH SENSOR ASSEMBLY. Refer to  REMOVAL [12/2019 - 10/2022] 

Result: 

OK 

See step  4

1. Install the fuel pressure gauge (for low pressure line of low pressure side).

   Refer to PROCEDURE - Step 2

2. Read the values on the Data List and the fuel pressure gauge when the Active Test was performed.

   Powertrain > Engine > Active Test 

   Active Test Display
   Control the Fuel Pump Duty Ratio

   Data List Display
   Fuel Pressure (Low) / Fuel Pressure 2

   Result

   GTS Operation	Fuel Pressure (Low) / Fuel Pressure 2	Fuel pressure gauge	Proceed to
   Low	Below 600 kPag	Below 600 kPa (6.1 kgf/cm2 , 87 psi)	A
   	600 kPag or higher	600 kPa (6.1 kgf/cm2 , 87 psi) or higher	B

Result: 

B 

REPLACE FUEL PUMP CONTROL ECU. Refer to  REMOVAL [12/2019 - 10/2022] 

Result: 

A 

See step  5

1. Clear the DTCs.

   Powertrain > Engine > Clear DTCs 

2. Turn the ignition switch off and wait for at least 30 seconds.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  6

1. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
2. Check the DTC judgment result.

   Powertrain > Engine > Utility 

   Tester Display
   All Readiness

3. Input the DTC: P008B-00.

   Result

   Result	Proceed to
   NORMAL (DTCs are not output)	A
   ABNORMAL (DTC P008B-00 is output)	B

Result: 

A 

CHECK FOR INTERMITTENT PROBLEMS. Refer to  CHECK FOR INTERMITTENT PROBLEMS [12/2019 - 10/2022] 

Result: 

B 

REPLACE ECM. Refer to  REMOVAL [12/2019 - 09/2020]  , or refer to  REMOVAL [09/2020 - 10/2022]