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DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms(Trouble diagnosis content)	DTC detection condition
P0088	00	HIGH FUEL PRES(Fuel rail/system pressure too high bank 1)	A	Diagnosis condition	Engine running at idle Engine coolant temperature: -12°C (10.4°F) to 40°C (104°F)
				Signal (terminal)	Fuel rail pressure sensor signal
				Threshold	Fuel rail pressure remains at more than 16.5 MPa (168.3 kg/cm2, 2392.5 psi)
				Diagnosis delay time	1 second or more
			B	Diagnosis condition	Engine running (regardless of water temperature)
				Signal (terminal)	Fuel rail pressure sensor signal
				Threshold	Actual fuel pressure - Target fuel pressure = 2.7 MPa (27.5 kg/cm2, 392 psi) or more
				Diagnosis delay time	5 seconds or more

POSSIBLE CAUSE

Harness or connectors (The high pressure fuel pump circuit is open or shorted.)
High pressure fuel pump

FAIL-SAFE

NOTE:

Any of the following fail-safe is applied.

Engine operating condition in fail-safe mode
Fail safe mode		Vehicle behavior
Traveling control mode	Accelerator angle variation control	ECM controls the accelerator pedal depression speed to make it slower than actual speed. This causes a drop in accelerating performance and encourages the driver to repair malfunction. NOTE: ECM does not control the accelerator pedal releasing speed.
Device fix mode		This mode fixes the EVT control solenoid valve in the reference position. The intake manifold runner control valve motor is turned OFF (intake manifold runner control valve opens).
Combustion control mode	Stratified charge combustion control at starting	No stratified charge combustion at starting (cold start).

Engine operating condition in fail-safe mode
Fail safe mode		Vehicle behavior
Traveling control mode	Accelerator angle variation control	ECM controls the accelerator pedal depression speed to make it slower than actual speed. This causes a drop in accelerating performance and encourages the driver to repair malfunction. NOTE: ECM does not control the accelerator pedal releasing speed.
Combustion control mode	Stratified charge combustion control at starting	No stratified charge combustion at starting (cold start).

DTC CONFIRMATION PROCEDURE

CHECK DTC PRIORITY
If DTC P0088 is displayed with DTC P0090, first perform the confirmation procedure (trouble diagnosis) for DTC P0090.

Is DTC P0090 detected?

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Perform diagnosis for P0090. Refer to DTC Description .

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GO TO 2.
PRECONDITIONING
If DTC CONFIRMATION PROCEDURE has been previously conducted, always perform the following procedure before conducting the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
- Before performing the following procedure, confirm that battery voltage is 11 V or more at idle.
- Before performing the following procedure, check that the fuel tank is 1/8 full of fuel.
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GO TO 3.
PERFORM DTC CONFIRMATION PROCEDURE-I
1. Warm up the engine to the normal operating temperature and keep the engine speed at idle for 15 seconds.
  NOTE: Warm up the engine until "COOLAN TEMP/S" in "Data Monitor" mode of "ENGINE" reaches at least 70°C (158°F).
2. Check 1st trip DTC.
Is DTC P0088 detected?

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Proceed to Diagnosis Procedure .

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GO TO 4.
PERFORM DTC CONFIRMATION PROCEDURE-II
1. Cool the engine until the engine coolant temperature reaches 60°C (140°F) or less.
2. Start the engine and wait at least 40 seconds.
3. Check 1st trip DTC.
Is DTC P0088 detected?

>>

Proceed to Diagnosis Procedure .

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To check malfunction symptom before repair: Refer to Intermittent Incident .

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Confirmation after repair: INSPECTION END