DTC P0088: Fuel Rail / System Pressure - Too High: Procedure

WARNING: This page is about a different car, the 2009 Lexus IS 350. However, it is still accessible from the selected car via links, so may be relevant.

CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P0088)

Connect Techstream to the DLC3.
Turn the engine switch on (IG) and turn the tester on.
Clear DTCs.
Start the engine.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

Read the DTCs using Techstream.

Result

Display (DTC output)	Proceed to
P0088	A
P0088 and other DTCs	B

HINT:

If any codes other than P0088 are output, perform troubleshooting for those DTCs first.

B → GO TO DTC CHART

A: Go to next step

CHECK FUEL PRESSURE SENSOR
1. Connect Techstream to the DLC3.
2. Turn the engine switch on (IG) and turn the tester on.
3. Start the engine.
4. Turn the tester on.
5. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Target Fuel Pressure / Fuel Press.
6. Check that the fuel pressure fluctuates when the target fuel pressure changes.
  HINT:
  
  The TARGET FUEL PRESS operation lowers the target fuel pressure by 12.5% or increase the target fuel pressure 24.8%.
  
  OK
  
  Fuel pressure fluctuates.
NG → REPLACE FUEL PRESSURE SENSOR

OK: Go to next step
REPLACE FUEL PUMP (FOR HIGH PRESSURE)
NEXT: Go to next step

CHECK IF DTC OUTPUT REOCCURS (SEE IF DTC P088 IS OUTPUT AGAIN)

Connect Techstream to the DLC3.
Turn the engine switch on (IG) and turn the tester on.
Clear DTCs.
Start the engine.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

Read the DTCs using Techstream.

Result

Display (DTC output)	Proceed to
P0088	A
No output	B

B → END

A → REPLACE ECM