DTC P2187:00 [ZJ, ZY]

id0102c0709100

DTC P2187:00

Fuel system too lean at idle
DETECTION CONDITION
•  The PCM monitors short term fuel trim (SHRTFT) and long term fuel trim (LONGFT) during closed loop fuel control during idle. If the LONGFT or the sum total of these fuel trims and correction exceed preprogrammed criteria, the PCM determines that fuel system is too lean during idle.
Diagnostic support note
•  This is a continuous monitor (fuel system).
•  The MIL illuminates if 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 PCM detects the above malfunction conditions during first drive cycle.
•  FREEZE FRAME DATA (Mode 2)/Snapshot data is available.
•  The DTC is stored in the PCM memory.
POSSIBLE CAUSE
•  Erratic signal to PCM
―  APP sensor signal malfunction
―  ECT sensor signal malfunction
―  MAF sensor signal malfunction
―  TP sensor signal malfunction
―  VSS signal malfunction
•  A/F sensor heater malfunction
•  A/F sensor malfunction
―  A/F sensor looseness
―  Leakage exhaust gas
―  A/F sensor malfunction
•  MAF sensor malfunction
•  Air suction in intake-air system
•  Improper operation of purge solenoid valve
•  Improper operation of variable valve timing control system
•  Improper operation of fuel injector
•  Fuel supply system or improper fuel line pressure
―  Pressure regulator (built-in fuel pump unit) malfunction
―  Fuel pump unit malfunction
―  Fuel filter clogged or restricted
―  Fuel leakage on fuel line from fuel distributor and fuel pump unit
•  Ignition system malfunction
―  Spark plug malfunction
•  Insufficient engine compression
•  PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA (MODE 2)
•  Is the DTC P2187:00 on FREEZE FRAME DATA (Mode 2)?
Yes
Go to the next step.
No
Go to the troubleshooting procedures for DTC on FREEZE FRAME DATA (Mode 2).
(See DTC TABLE [ZJ, ZY].)
2
VERIFY FREEZE FRAME DATA (MODE 2)/SNAPSHOT DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAVE BEEN RECORDED
•  Have the FREEZE FRAME DATA (Mode 2)/snapshot data and DIAGNOSTIC MONITORING TEST RESULTS (fuel system related) been recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA (Mode 2)/snapshot data and DIAGNOSTIC MONITORING TEST RESULTS on the repair order, then go to the next step.
3
VERIFY RELATED SERVICE 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.
4
VERIFY RELATED PENDING CODE AND STORED DTC
•  Turn the ignition switch off, then to the ON position (engine off).
•  Verify the related PENDING CODE and stored DTCs using the M-MDS.
•  Are any other DTC present?
Yes
If the misfire DTC is present:
•  Go to Step 11.
If other DTC is present:
•  Go to the applicable DTC inspection.
No
If drive ability concern is present:
•  Go to Step 11.
If other:
•  Go to the next step.
5
VERIFY CURRENT INPUT SIGNAL STATUS
•  Perform the PID/DATA Monitor and Record Procedure and access the following PIDs:
―  APP
―  ECT
―  MAF
―  TP REL
―  VSS
•  Is there any signal that is far out of specification when KOER?
Yes
Inspect the suspected sensor and related wiring harness.
Repair or replace the malfunctioning part according to the inspection results, then go to Step 20.
No
Go to the next step.
6
VERIFY CURRENT INPUT SIGNAL STATUS UNDER FREEZE FRAME DATA (MODE 2) CONDITION
Caution
•  While performing this step, always operate the vehicle in a safe and lawful manner.
•  When the M-MDS is used to observe monitor system status while driving, be sure to have another technician with you, or record the data in the M-MDS using the PID/DATA MONITOR AND RECORD capturing function and inspect later.
•  Perform the PID/DATA Monitor and Record Procedure and access the same PIDs as in Step 5 under the FREEZE FRAME DATA (Mode 2) condition.
•  Is there any signal which causes drastic changes?
Yes
Inspect the suspected sensor and related wiring harness.
Repair or replace the malfunctioning part according to the inspection results, then go to Step 20.
No
Go to the next step.
7
INSPECT A/F SENSOR HEATER
•  Inspect the A/F sensor heater.
•  Is there any malfunction?
Yes
Replace the A/F sensor, then go to Step 20.
(See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [ZJ, ZY].)
No
Go to the next step.
8
INSPECT A/F SENSOR
•  Inspect the A/F sensor.
•  Is there any malfunction?
Yes
Go to the next step.
No
Go to Step 11.
9
INSPECT INSTALLATION OF A/F SENSOR
•  Inspect if the A/F sensor is loosely installed.
•  Is the A/F sensor installed securely?
Yes
Go to the next step.
No
Retighten the A/F sensor, then go to Step 20.
(See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [ZJ, ZY].)
10
INSPECT GAS LEAKAGE FROM EXHAUST SYSTEM
•  Visually inspect if there is exhaust gas leakage between the exhaust manifold and A/F sensor.
•  Is there gas leakage?
Yes
Repair or replace the malfunctioning part according to the inspection results, then go to Step 20.
No
Replace the A/F sensor, then go to Step 20.
(See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [ZJ, ZY].)
11
VERIFY CURRENT INPUT SIGNAL STATUS OF MAF SENSOR
•  Start the engine.
•  Perform the PID/DATA Monitor and Record Procedure and access the MAF PID.
•  Verify that the MAF PID changes quickly according to race the engine speed.
•  Is the MAF PID value normal?
Yes
Go to Step 13.
No
Go to the next step.
12
INSPECT INTAKE-AIR SYSTEM FOR EXCESSIVE AIR SUCTION
•  Visually inspect the hoses in intake-air system for looseness, cracks or damages.
Note
•  Engine speed may change when rust penetrating agent is sprayed on the air suction area.
•  Is there any malfunction?
Yes
Repair or replace the malfunctioning part according to the inspection results, then go to Step 20.
No
Replace the MAF/IAT sensor, then go to Step 20.
(See MASS AIR FLOW (MAF)/INTAKE AIR TEMPERATURE (IAT) SENSOR REMOVAL/INSTALLATION [ZJ, ZY].)
13
INSPECT PURGE SOLENOID VALVE OPERATION
•  Perform the Purge Control System Inspection.
•  Does the purge control system function properly?
Yes
Go to the next step.
No
Repair or replace the malfunctioning part according to the inspection results, then go to Step 20.
14
INSPECT VARIABLE VALVE TIMING CONTROL SYSTEM OPERATION
•  Perform the Variable Valve Timing Control System Operation Inspection.
•  Does the variable valve timing control system work properly?
Yes
Go to the next step.
No
Repair or replace the malfunctioning part according to the inspection results, then go to Step 20.
15
INSPECT FUEL INJECTOR OPERATION
•  Perform the Fuel Injector Operation Inspection.
•  Does the fuel injector work properly?
Yes
Go to the next step.
No
Repair or replace the malfunctioning part according to the inspection results, then go to Step 20.
16
INSPECT FUEL LINE PRESSURE
•  Turn the ignition switch off.
Note
•  If the engine will not start, inspect the fuel line pressure with ignition switch to the ON position.
•  Perform the “FUEL LINE PRESSURE INSPECTION” while the engine running.
•  Is the fuel line pressure normal?
Yes
Go to Step 18.
No
If the fuel pressure is too high:
•  Replace the fuel pump unit, then go to Step 20.
If the fuel pressure is low:
•  Go to the next step.
17
INSPECT FUEL SYSTEM FOR FUEL LEAKAGE
•  Visually inspect the fuel leakage in the fuel system.
•  Is there fuel leakage?
Yes
Repair or replace the malfunctioning part according to the inspection results, then go to Step 20.
No
Inspect for foreign materials or stain inside fuel filter (low-pressure side).
•  If the foreign material or stain is found inside the fuel filter (low-pressure side):
―  Clean the fuel tank and filter, then go to Step 20.
18
INSPECT IGNITION SYSTEM OPERATION
•  Perform the Spark Test.
•  Is the strong blue spark visible at each cylinder?
Yes
Go to the next step.
No
Repair or replace the malfunctioning part according to the inspection results, then go to Step 20.
19
INSPECT ENGINE COMPRESSION
•  Inspect the engine compression.
•  Is there any malfunction?
Yes
Perform the engine overhaul for repairs, then go to the next step.
No
Go to the next step.
20
VERIFY DTC TROUBLESHOOTING COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Perform the KOER self test.
•  Is the PENDING CODE for this DTC present?
Yes
Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [ZJ, ZY].)
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.
(See DTC TABLE [ZJ, ZY].)
No
DTC troubleshooting completed.