DTC P2291:00 [MZ-CD 1.6]

id0102g8137200

DTC P2291:00

Fuel pressure too low - engine cranking

DETECTION CONDITION

•  The PCM monitors the fuel pressure. If the fuel pressure at engine start is less than 10 MPa ({102 kgf/cm2, 1,450 psi}, the PCM determines that the fuel pressure is too low.

POSSIBLE CAUSE

•  Leakage in fuel line (High-pressure side, Low-pressure side)

•  Short to ground in the wiring harness between fuel metering valve terminal B and PCM terminal 202

•  Restriction in low-pressure side fuel line

•  Clogged or damaged fuel filter

•  Fuel pressure sensor malfunction (built-in common rail)

•  Fuel metering valve malfunction

•  Fuel injector stuck open

•  Supply pump malfunction

•  Supply pump adaptive value reset improper

•  PCM malfunction

DTC P2291:00	Fuel pressure too low - engine cranking
DETECTION CONDITION	• The PCM monitors the fuel pressure. If the fuel pressure at engine start is less than 10 MPa ({102 kgf/cm2, 1,450 psi}, the PCM determines that the fuel pressure is too low.
POSSIBLE CAUSE	• Leakage in fuel line (High-pressure side, Low-pressure side) • Short to ground in the wiring harness between fuel metering valve terminal B and PCM terminal 202 • Restriction in low-pressure side fuel line • Clogged or damaged fuel filter • Fuel pressure sensor malfunction (built-in common rail) • Fuel metering valve malfunction • Fuel injector stuck open • Supply pump malfunction • Supply pump adaptive value reset improper • PCM malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has the FREEZE FRAME DATA been recorded?	Yes	Go to the next step.
1		No	Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2	VERIFY RELATED REPAIR INFORMATION AVAILABILITY • Verify related service repair information availability. • Is any related repair information available?	Yes	Perform repair or diagnosis according to the available repair information. • If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	VERIFY RELATED PENDING CODE AND/OR DTC • Switch the ignition to off, then to ON (engine off). • Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure. (See ON-BOARD DIAGNOSTIC TEST [MZ-CD 1.6].) • Is the other PENDING CODE/DTC also present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [MZ-CD 1.6].)
3		No	Go to the next step.
4	INSPECT FUEL FILTER • Switch the ignition to off. • Inspect the fuel filter for clogging or damage. • Is there any malfunction?	Yes	Replace the fuel filter, then go to Step 11.
4		No	Go to the next step.
5	INSPECT FUEL LINE FOR LEAKAGE • Inspect for fuel leakage in the following fuel lines: ― Fuel tank and fuel filter ― Fuel filter and supply pump ― Supply pump and common rail ― Common rail and fuel injector • Is there any malfunction?	Yes	Repair or replace suspect fuel line, then go to Step 11.
5		No	Go to the next step.
6	INSPECT FUEL METERING VALVE CONTROL CIRCUIT FOR SHORT TO GROUND • Remove the fuel metering valve and PCM connectors. • Inspect for continuity between fuel metering valve terminal B and body ground. • Is there any continuity?	Yes	Repair or replace the wiring harness for a possible short to ground, then go to Step 11.
6		No	Go to the next step.
7	INSPECT LOW PRESSURE SIDE FUEL LINE FOR RESTRICTION • Remove and inspect for fuel restriction in the following fuel lines: ― Fuel tank and fuel filter ― Fuel filter and supply pump • Is there any restriction?	Yes	Repair or replace suspect fuel line, then go to Step 11.
7		No	Go to the next step.
8	INSPECT FUEL PRESSURE SENSOR • Inspect the fuel pressure sensor. • Is there any malfunction?	Yes	Go to the next step.
8		No	Go to Step 10.
9	INSPECT FUEL INJECTOR FOR STUCK OPEN • Remove the all fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION [MZ-CD 1.6].) • Is there any stuck open?	Yes	Replace the suspect fuel injector, then go to Step 11. (See FUEL INJECTOR REMOVAL/INSTALLATION [MZ-CD 1.6].)
9		No	Replace the common rail, then go to Step 11. (See COMMON RAIL REMOVAL/INSTALLATION [MZ-CD 1.6].)
10	PERFORM FUEL INJECTION PUMP LEARNED VALUES RESET • Clear the DTC from the PCM memory using the M-MDS. • Perform the FUEL INJECTION PUMP LEARNED VALUES RESET. (See FUEL INJECTION PUMP LEARNED VALUES RESET [MZ-CD 1.6].) • Run the vehicle under the FREEZE FRAME DATA stored condition. • Is the same DTC present?	Yes	Replace the fuel metering valve. (See FUEL METERING VALVE REMOVAL/INSTALLATION [MZ-CD 1.6].) Then go to the next step.
10		No	Go to Step 12.
11	VERIFY THAT DTC P2291:00 TROUBLESHOOTING IS COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. • Run the vehicle under the FREEZE FRAME DATA stored condition. • Is the same DTC present?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [MZ-CD 1.6].) Go to the next step.
11		No	Go to the next step.
12	VERIFY AFTER REPAIR PROCEDURE • Perform the after repair procedure. (See AFTER REPAIR PROCEDURE [MZ-CD 1.6].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [MZ-CD 1.6].)
12		No	DTC troubleshooting completed.