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DTC P2187
Fuel system too lean at idle
DETECTION CONDITION
• PCM monitors short term fuel trim (SHRTFT) and long term fuel trim (LONGFT) during closed loop fuel control at idle. If the LONGFT or the sum total of these fuel terms exceed preprogrammed criteria. PCM determines that fuel system is too lean at idle.
Diagnostic support note
• This is a continuous monitor. (FUEL SYSTEM)
• 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 is available.
• DTC is stored in the PCM memory.
POSSIBLE CAUSE
• Misfire
• Front HO2S deterioration
• Front HO2S heater malfunction
• MAF sensor malfunction
• Pressure regulator (built-in fuel injection pump) malfunction
• Fuel pump malfunction
• Fuel filter clogged or restricted
• Fuel leakage on fuel line from fuel delivery pipe and fuel pump
• Leakage exhaust system
• Purge solenoid valve malfunction
• Purge solenoid hoses improper connection
• Air suction in intake-air system
• Insufficient engine compression
Diagnostic procedure
STEP
INSPECTION
ACTION
1 VERIFY FREEZE FRAME DATA 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 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.
No Go to the next step.
3 VERIFY RELATED PENDING CODE OR STORED DTCS
• Turn ignition switch to off, then the ON position (Engine off).
• Verify related pending code or stored DTCs.
• Is other DTC present? Yes If misfire DTC is present, go to Step 8.
If other DTC is present, go to appropriate DTC troubleshooting procedure.
(See DTC TABLE [LF].)
No If drivability concern is present, go to Step 8.
If not, go to the next step.
4 IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA
• Is DTC P2187 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 (KEY TO ON/IDLE)
• Access ECT, MAF and TP PIDs using WDS or equivalent.)
• Is there any signal that is far out of specification when key is ON and engine runs? Yes Inspect suspected sensor and excessive resistance in related wiring harnesses.
Repair or if necessary.
Then go to Step 16.
No Go to the next step.
6 VERIFY CURRENT INPUT SIGANL STATUS UNDER TROUBLE CONDITION
• Inspect same PIDs as Step 4 while simulating FREEZE FRAME DATA condition.
• Is there any signal which causes drastic changes? Yes Inspect suspected sensor and related wiring harnesses, repair or replace it.
Then go to Step 16.
No Go to the next step.
7 VERIFY CURRENT INUPUT SIGNAL STATUS OF FRONT HO2S
• Access O2S11 PID using WDS or equivalent.
• Check PID under following accelerator pedal condition (in PARK or NEUTRAL).
• Is PID reading normal?
- Above 0.45 V when accelerator pedal is suddenly depressed (rich condition).
- Below 0.45 V 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 front HO2S.
Then go to Step 16.
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 MAF/IAT sensor, then go to Step 16.
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 source of air suction, then go to Step 16.
No Go to the next step.
10 INSPECT PURGE SOLENOID VALVE STUCK OPEN
• Turn ignition switch to off.
• Disconnect both hoses from purge solenoid valve.
• Blow air through purge solenoid valve.
• Does air blow through? Yes Replace purge solenoid valve.
Then go to Step 16.
No Go to the next step.
11 INSPECT FUEL LINE PRESSURE
• Turn ignition switch to off.
• Inspect fuel line pressure.
(See FUEL LINE PRESSURE INSPECTION [ZJ, Z6, LF].)
• Is fuel line pressure normal? Yes Go to Step 13.
No If fuel pressure is too high, replace fuel pump unit, then go to Step 16.
If fuel line pressure is low, go to the next step.
12 INSPECT FUEL LINE FROM FUEL PUMP TO FUEL DELIVERY PIPE
• Visually inspect fuel line for any leakage.
• Is any fuel leakage found? Yes Replace suspected fuel line, then go to Step 16.
No Inspect for foreign materials or stain inside fuel filter (low-pressure).
If for foreign materials or stain inside fuel filter (low-pressure), clean of fuel tank and filter.
Then go to Step 16.
13 INSPECT IGNITION SYSTEM
• Carry out spark test.
(See Spark Test.)
• Is strong blue spark visible at each cylinder? Yes Go to the next step.
No Repair or replace malfunctioning part according to spark test results, then go to Step 16.
14 INSPECT ENGINE COMPRESSION
• Inspect engine compression.
(See COMPRESSION INSPECTION [LF].)
• Is it normal? Yes Go to the next step.
No Implement engine overhaul for repairs, then go to Step 16.
15 INSPECT FUEL INJECTOR OPERATION
• Remove fuel injector.
• Inspect fuel injector (resistance, injection amount).
(See FUEL INJECTOR INSPECTION [ZJ, Z6, LF].)
• Is fuel injector normal? Yes Go to the next step.
No Replace suspected fuel injector, then go to the next step.
16 VERIFY TROUBLESHOOTING OF DTC P2187 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear DTC from PCM memory using WDS or equivalent.
• Perform the PCM Adaptive Memory Produce Drive Mode.
(See OBD DRIVE MODE [LF].)
• Is the PENDING CODE for this DTC present? Yes Replace PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [LF].)
No Go to the next step.
17 VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
(See AFTER REPAIR PROCEDURE [LF].)
• Is there any DTC present? Yes Go to the applicable DTC inspection.
(See DTC TABLE [LF].)
No Troubleshooting completed.
_____________________________________________________________________--
DTC P2195
Front HO2S signal stuck lean
DETECTION CONDITION
• The PCM monitors the front HO2S output voltage when the following conditions are met. If output voltage is less than 0.45 V for 41 s, the PCM determines that the front HO2S signal remains lean.
MONITORING CONDITION
- Fuel injection control system status: feedback zone
- ECT: more than 70 °C {158 °F}
- Engine speed: more than 1,500 rpm
Diagnostic support note
• This is a continuous monitor. (HO2S)
• 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 is available.
• DTC is stored in the PCM memory.
POSSIBLE CAUSE
• Front HO2S malfunction
• Fuel injector malfunction
• Insufficient fuel line pressure
• Leakage exhaust gas
• Air suction at intake-air system
• Leakage fuel
• MAF sensor malfunction
• ECT sensor malfunction
• PCM malfunction
Diagnostic procedure
STEP
INSPECTION
ACTION
1 VERIFY FREEZE FRAME DATA 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 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.
No Go to the next step.
3 VERIFY RELATED PENDING CODE OR STORED DTC
• Turn the ignition switch off, then ON position (Engine off).
• Verify the related PENDING CODE or stored DTCs.
• Is the DTC P2177 or P2187 also present? Yes Go to applicable DTC troubleshooting.
(See DTC TABLE [LF].)
No Go to the next step.
4 IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA
• Is DTC P2195 on FREEZE FRAME DATA? Yes Go to the next step.
No Go to FREEZE FRAME DATA DTC inspection.
(See DTC TABLE [LF].)
5 VERIFY CURRENT INPUT SIGNAL STATUS
• Connect the WDS or equivalent to the DLC-2.
• Verify the following PIDs.
(See PCM INSPECTION [LF].)
- ECT
- MAF
- TP
- VSS
• Are the PIDs normal? Yes Go to the next step.
No Inspect the malfunctioning part according to the inspection results.
Then go to Step 14.
6 VERIFY CURRENT INPUT SIGNAL STATUS UNDER FREEZE FRAME DATA CONDITION
• Connect the WDS or equivalent to the DLC-2.
• Verify the following PIDs under FREEZE FRAME DATA condition.
(See PCM INSPECTION [LF].)
- ECT
- MAF
- TP
- VSS
• Are the PIDs normal? Yes Go to the next step.
No Inspect the malfunctioning part according to the inspection results.
Then go to Step 14.
7 INSPECT INTAKE-AIR SYSTEM FOR EXCESSIVE AIR SUCTION
• Visually inspect for loosen, cracks or damages hose in intake-air system.
• Is there any malfunction? Yes Repair or replace the malfunctioning part, then go to Step 14.
No Go to the next step.
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 MAF/IAT sensor, then go to Step 14.
9 INSPECT FRONT HO2S
• Inspect front HO2S.
(See FRONT HEATED OXYGEN SENSOR (HO2S) INSPECTION [LF].)
• Is there any malfunction? Yes Replace front HO2S, then go to Step 14.
(See HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [LF].)
No Go to the next step.
10 INSPECT FUEL INJECTOR
• Inspect fuel injector.
(See FUEL INJECTOR INSPECTION [ZJ, Z6, LF].)
• Is there any malfunction? Yes Replace suspected fuel injector, then go to Step 14.
(See FUEL INJECTOR REMOVAL/INSTALLATION [LF].)
No Go to the next step.
11 INSPECT FUEL LINE PRESSURE
• Perform the "FUEL LINE PRESSURE INSPECTION".
(See FUEL LINE PRESSURE INSPECTION [ZJ, Z6, LF].)
• Is there any malfunction? Yes Go to the next step.
No Go to Step 13.
12 INSPECT FUEL SYSTEM FOR FUEL LEAKAGE
• Visually inspect fuel leakage in the fuel system.
• Is there fuel leakage? Yes Repair or replace the malfunctioning part, then go to the next step.
No Replace the fuel pump unit, then go to the next step.
(See FUEL PUMP UNIT REMOVAL/INSTALLATION [ZJ, Z6, LF].)
13 VERIFY TROUBLESHOOTING OF DTC P2195 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the WDS or equivalent.
• Perform the PCM Adopted Memory Produce Drive Mode and HO2S heater, and TWC Repair Verification Drive Mode.
(See OBD DRIVE MODE [LF].)
• Is the PENDING CODE for this DTC present? Yes Replace PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [LF].)
No Go to the next step.
14 VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
(See AFTER REPAIR PROCEDURE [LF].)
• Is there any DTC present? Yes Go to the applicable DTC inspection.
(See DTC TABLE [LF].)
No Troubleshooting completed.
_______________________________________________________________________________-
DTC P2196
Front HO2S signal stuck rich
DETECTION CONDITION
• The PCM monitors the front HO2S output voltage when the following conditions are met. If output voltage is more than 0.45 V for 41 s, the PCM determines that the front HO2S signal remains rich.
MONITORING CONDITION
- Fuel injection control system status: feedback zone
- ECT: more than 70 °C {158 °F}
- Engine speed: more than 1,500 rpm
Diagnostic support note
• This is a continuous monitor (HO2S).
• 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 is available.
• DTC is stored in the PCM memory.
POSSIBLE CAUSE
• Front HO2S malfunction
• Fuel injector malfunction
• Excessive fuel pressure
• Restriction in intake-air system
• MAF sensor malfunction
• ECT sensor malfunction
• PCM malfunction
Diagnostic procedure
STEP
INSPECTION
ACTION
1 VERIFY FREEZE FRAME DATA 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 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.
No Go to applicable DTC troubleshooting.
(See DTC TABLE [LF].)
3 VERIFY RELATED PENDING CODE OR STORED DTC
• Turn the ignition switch off, then ON position (Engine off).
• Verify the related PENDING CODE or stored DTCs.
• Is the DTC P2177 or P2187 also present? Yes Go to the appropriate DTC inspection.
(See DTC TABLE [LF].)
No Go to the next step.
4 IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA
• Is DTC P2196 on FREEZE FRAME DATA? Yes Go to the next step.
No Go to FREEZE FRAME DATA DTC inspection.
(See DTC TABLE [LF].)
5 VERIFY CURRENT INPUT SIGNAL STATUS
• Connect the WDS or equivalent to the DLC-2.
• Verify the following PIDs.
(See PCM INSPECTION [LF].)
- ECT
- MAF
- TP
- VSS
• Are the PIDs normal? Yes Go to the next step.
No Inspect the malfunctioning part according to the inspection results.
Then go to Step 10.
6 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 MAF/IAT sensor, then go to Step 10.
7 INSPECT FRONT HO2S
• Inspect the front HO2S.
(See FRONT HEATED OXYGEN SENSOR (HO2S) INSPECTION [LF].)
• Is there any malfunction? Yes Replace front HO2S, then go to Step 10.
(See HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [LF].)
No Go to the next step.
8 INSPECT FUEL INJECTOR
• Inspect fuel injector.
(See FUEL INJECTOR INSPECTION [ZJ, Z6, LF].)
• Is there any malfunction? Yes Replace suspected fuel injector, then go to Step 10.
(See FUEL INJECTOR REMOVAL/INSTALLATION [LF].)
No Go to the next step.
9 INSPECT FUEL LINE PRESSURE
• Perform the "FUEL LINE PRESSURE INSPECTION".
(See FUEL LINE PRESSURE INSPECTION [ZJ, Z6, LF].)
• Is there any malfunction? Yes Replace the fuel pump unit, then go to the next step.
(See FUEL PUMP UNIT REMOVAL/INSTALLATION [ZJ, Z6, LF].)
No Go to the next step.
10 VERIFY TROUBLESHOOTING OF DTC P2196 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the WDS or equivalent.
• Perform the PCM Adopted Memory Produce Drive Mode and HO2S heater, and TWC Repair Verification Drive Mode.
(See OBD DRIVE MODE [LF].)
• Is the PENDING CODE for this DTC present? Yes Replace PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [LF].)
No Go to the next step.
11 VERIFY AFTER REPAIR PROCEDURE
• Perform the "After Repair Procedure".
(See AFTER REPAIR PROCEDURE [LF].)
• Is there any DTC present? Yes Go to the applicable DTC inspection.
(See DTC TABLE [LF].)
No Troubleshooting completed.
