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DTC P2187, P2189 [AJ]

BME010202100W05

DTC P2187 DTC P2189 | Fuel system too lean at idle (Right bank) Fuel system too lean at idle (Left bank)
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DETECTION CONDITION | • PCM monitors short term fuel trim (SHRTFT) long term fuel trim (LONGFT) during closed loop fuel control at idle. If the LONGFT and the sum total of these fuel trims exceed preprogrammed criteria. PCM determines that fuel system is too lean at idle. Diagnostic support note
• This is a continuous monitor. (FUEL SYSTEM)
• The MIL illuminates if the PCM detects the above malfunction 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 condition during the first drive cycle.
• FREEZE FRAME DATA is available
• DTC is stored in the PCM memory.
POSSIBLE CAUSE | • Misfire • HO2S (RF, LF) deterioration • HO2S heater (RF, LF) 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
• PCM malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | VERIFY FREEZE FRAME DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAVE BEEN RECORDED • Have FREEZE FRAME DATA and DIAGNOSTIC MONITORING TEST RESULTS (Fuel system related) been recorded? | Yes | Go to the next step.
No | Record the FREEZE FRAME DATA and DIAGNOSTIC MONITORING TEST RESULTS on the repair order, then go to the next step.
2 | VERIFY RELATED REPAIR INFORMATION AVAILABILITY • Verify related Service Information and/or on-line 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 the ignition switch to OFF, then ON (Engine off). • Verify related pending code or stored DTCs using the WDS or equivalent. • 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 [AJ] (VIN: JM0 LW10J300 301406-, JMZ LW69J7*# 307683-, JM8 LW28J**# 301514-, JM8 LW28A**# 301514- (Assumed)).)
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 P2187 or P2189 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 ON/IDLE) • Access ECT, MAF, TP and VSS PIDs using the WDS or equivalent. • Is there any signal that is far out of specification when ignition switch 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 SIGNAL STATUS UNDER TROUBLE CONDITION • Inspect same PIDs as Step 5 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 INPUT SIGNAL STATUS OF FRONT HO2S • Start the engine and warm it up completely. • Access O2S11 (with P2187) or O2S21 (with P2189) PID using the WDS or equivalent. • Check PID under following accelerator pedal condition (in PARK).
• Is PID reading normal?

- More than 0.45 V when accelerator pedal is suddenly depressed (rich condition).

- Less than 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. • If there is no leakage, replace front HO2S (See EXHAUST SYSTEM REMOVAL/INSTALLATION [AJ].) 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 the ignition switch 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 • Perform the "FUEL LINE PRESSURE INSPECTION". (See FUEL LINE PRESSURE INSPECTION [AJ].) • Is there any malfunction? | Yes | 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.
No | Go to Step 13.
12 | INSPECT LEAKAGE 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 for right bank cylinders (with P2187) or left bank cylinders (with P2189). (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 the engine compression for right bank cylinders (with P2187) or left bank cylinders (with P2189). (See COMPRESSION INSPECTION [AJ].) • Is there any malfunction? | 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 for right bank cylinders (with P2187) or left bank cylinders (with P2189). • Inspect fuel injector (resistance, injection amount). (See FUEL INJECTOR INSPECTION [AJ] (VIN: JM0 LW10J300 301406-, JMZ LW69J7*# 307683-, JM8 LW28J**# 301514-, JM8 LW28A**# 301514- (Assumed)).)
• 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 AND P2189 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 [AJ] (VIN: JM0 LW10J300 301406-, JMZ LW69J7*# 307683-, JM8 LW28J**# 301514-, JM8 LW28A**# 301514- (Assumed)).)
• Is the PENDING CODE same DTC present?
Yes
Replace PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [AJ].)
No | Go to the next step.
17 | VERIFY AFTER REPAIR PROCEDURE • Perform "After Repair Procedure". (See AFTER REPAIR PROCEDURE [AJ].) • Are any DTCs present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE [AJ] (VIN: JM0 LW10J300 301406-, JMZ LW69J7*# 307683-, JM8 LW28J**# 301514-, JM8 LW28A**# 301514- (Assumed)).)
No | Troubleshooting completed.