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 DTC P2187 [L3 Turbo]

DTC P2187 [L3 Turbo]

id0102b7812500

DTC P2187

Fuel system too lean at idle

DETECTION CONDITION

• PCM monitors the short term fuel trim (SHRTFT) and long term fuel trim (LONGFT) during closed loop fuel control at idle. If the LONGFT and the sum total of these fuel trims exceed the preprogrammed criteria, the PCM determines that fuel system is too lean at idle.
Diagnostic support note
• This is a continuous monitor. (Fuel system)
• MIL illuminates if the PCM detects the above malfunctioning condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
• PENDING CODE is available if the PCM detects the above malfunction conditions during the first drive cycle.
• FREEZE FRAME DATA is available.
• DTCs are stored in the PCM memory.

POSSIBLE CAUSE

• Misfire
• A/F sensor deterioration
• A/F sensor heater malfunction
• MAF sensor malfunction
• Pressure regulator malfunction
• Fuel pressure sensor malfunction
• Relief valve (built-in fuel delivery pipe) malfunction
• Spill valve control solenoid valve (built-in high pressure fuel pump) malfunction
• High pressure fuel pump malfunction
• Fuel pump malfunction
• Fuel filter clogged or restricted
• Fuel leakage on fuel line from fuel delivery pipe and fuel pump
• Exhaust system leakage
• Purge solenoid valve malfunction
• Purge solenoid hoses improper connection
• Air suction in intake-air system
• Insufficient engine compression
• Variable valve timing control system improper operation
• PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
VERIFY FREEZE FRAME DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAS BEEN RECORDED
• Has FREEZE FRAME DATA been recorded?
Yes
Go to the next step.
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 Information availability.
• Is any related Service Information available?
Yes
Perform repair or diagnosis according to the available Service information.
If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
VERIFY RELATED PENDING CODE OR STORED DTCS
• Turn the ignition switch to off, then to the ON position (Engine off).
• Verify related pending code or stored DTCs.
• Are other DTCs present?
Yes
If misfire DTC is present, go to Step 8.
If other DTC is present, go to the applicable DTC inspection.
No
If driveability concern is present, go to Step 8.
If not, go to the next step.
4
IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA
• Is DTC P2177 on FREEZE FRAME DATA?
Yes
Go to the next step.
No
Go to troubleshooting procedures for DTC on FREEZE FRAME DATA.
5
VERIFY CURRENT INPUT SIGNAL STATUS (IGNITION SWITCH TO THE ON POSITION/IDLE)
• Access the APP1, APP2, ECT, MAF and TP PIDs using the WDS or equivalent.)
• Is there any signal that is far out of specification when the ignition switch is at the ON position and the engine runs?
Yes
Inspect the sensor and excessive resistance in related wiring harnesses.
Repair if necessary.
Then go to Step 20.
No
Go to the next step.
6
VERIFY CURRENT INPUT SIGNAL STATUS UNDER TROUBLE CONDITION
• Inspect the same PIDs as Step 4 while simulating FREEZE FRAME DATA condition.
• Is there any signal which causes drastic changes?
Yes
Inspect the sensor and related wiring harnesses, repair or replace it.
Then go to Step 20.
No
Go to the next step.
7
VERIFY CURRENT INPUT SIGNAL STATUS OF A/F SENSOR
• Access the O2S11 for P2177 PID using the WDS or equivalent.
• Check the PID under following accelerator pedal condition in NEUTRAL.
• Is the PID reading normal?

- -0.1-0.1 A when idle

- Below 0.25 mA just after release of accelerator pedal (lean condition)

Yes
Go to the next step.
No
Visually inspect for any gas leakage between exhaust manifold and A/F sensor.
Then go to Step 20.
8
VERIFY CURRENT INPUT SIGNAL STATUS OF MAF SENSOR
• Connect the WDS or equivalent to the DLC-2.
• Start the engine.
• Access the MAF PID.
• Verify that the MAF PID changes quickly according to engine speed.
• Is the PID normal?
Yes
Go to the next step.
No
Replace the MAF/IAT sensor, then go to Step 20.
9
INSPECT FOR EXCESSIVE AIR SUCTION OF INTAKE AIR SYSTEM
• Visually inspect for loosen, cracks or damages hoses on intake-air system.
• Is there any malfunction?
Yes
Repair or replace the source of air suction, then go to Step 20.
No
Go to the next step.
10
INSPECT PURGE SOLENOID VALVE STUCK OPEN
• Turn the ignition switch to off.
• Disconnect the both hoses from purge solenoid valve.
• Blow the air through purge solenoid valve.
• Does the air blow through?
Yes
Replace the purge solenoid valve.
Then go to Step 20.
No
Go to the next step.
11
INSPECT FUEL PRESSURE (HIGH-SIDE)
• Access and monitor FUEL_PRES PID.
• Is the FUEL_PRES PID value within the specified?
Yes
Go to Step 15.
No
Go to the next step.
12
IDENTIFY CAUSE BY FUEL PRESSURE SENSOR OR HIGH PRESSURE FUEL PUMP
• Is the vehicle accelerate performance normally?
Yes
Go to the next step.
No
Go to Step 14.
13
INSPECT FUEL PRESSURE SENSOR
• Inspect the fuel pressure sensor.
• Is the fuel pressure sensor normal?
Yes
Go to Step 15.
No
Replace the fuel delivery pipe, then go to Step 20.
14
INSPECT HIGH PRESSURE FUEL PUMP
• Replace the high pressure fuel pump
• Monitor FUEL_PRES PID
• Is the FUEL_PRES PID value within the specified?
Yes
Go to Step 20.
No
Go to the next step.
15
INSPECT FUEL PRESSURE (LOW-SIDE)
• Connect the fuel pressure gauge between fuel pump and high pressure fuel pump.
• Measure the low side fuel pressure.
• Is the low side fuel pressure within the specified?
Yes
Go to the next step.
No
Inspect for following:
• Fuel line restriction
• Fuel filter clogging
If okay replace the fuel pump. Then go to Step 20.
16
INSPECT IGNITION SYSTEM
• Perform the spark test.
(See Spark Test.)
• Is strong blue spark visible at each cylinder?
Yes
Go to the next step.
No
Repair or replace the malfunctioning part according to spark test results, then go to Step 20.
17
INSPECT ENGINE COMPRESSION
• Inspect the engine compression.
• Is it normal?
Yes
Go to the next step.
No
Implement the engine overhaul for repairs, then go to Step 20.
18
INSPECT VARIABLE VALVE TIMING CONTROL SYSTEM OPERATION
• Inspect the variable valve timing control system operation.
• Does the variable valve timing control system work properly?
Yes
Go to the next step.
No
Repair or replace the malfunctioning part according to inspection results, then go to Step 20.
19
INSPECT FUEL INJECTOR OPERATION
• Remove the fuel injector.
• Inspect the fuel injector (resistance, injection amount).
• Is the fuel injector normal?
Yes
Go to the next step.
No
Replace the fuel injector, then go to the next step.
20
VERIFY TROUBLESHOOTING OF DTC P2187 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the WDS or equivalent.
• Perform the PCM Adaptive Memory Produce Drive Mode.
• Is the PENDING CODE for this DTC present?
Yes
Replace the PCM, then go to the next step.
No
Go to the next step.
21
VERIFY AFTER REPAIR PROCEDURE
• Perform the "AFTER REPAIR PROCEDURE".
• Are any DTCs present?
Yes
Go to the applicable DTC inspection.
No
Troubleshooting completed.