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DTC P2096 [L3 Turbo]

id0102b7810800

DTC P2096 | Target A/F feedback system too lean
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DETECTION CONDITION | • The PCM monitors the target A/F fuel trim while under target A/F feedback control. If the fuel trim is more than the specification, the PCM determines that the target A/F feedback system is too lean. • HO2S voltage is more than 0.1 V. Diagnostic support note • This is a continuous monitor (Fuel system). • The 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 condition during the first drive cycle. • FREEZE FRAME DATA is available. • DTCs are stored in the PCM memory.
POSSIBLE CAUSE | • Exhaust gas leakage • HO2S malfunction • IAT sensor malfunction • ECT sensor malfunction • Air suction in intake-air system • A/F sensor malfunction • MAF sensor malfunction • Insufficient fuel line pressure • 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 • Leakage fuel • Improper operation ignition system • Insufficient engine compression • Fuel injector malfunction • PCM malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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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 DTC • Turn the ignition switch off then to the ON position (Engine off). • Verify the related PENDING CODE or stored DTCs. • Is the DTC P2177 or P2187 also present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE [L3 Turbo].)
No | Go to the next step.
4 | IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA • Is DTC P2096 on FREEZE FRAME DATA? | Yes | Go to the next step.
No | Go to FREEZE FRAME DATA DTC inspection. (See DTC TABLE [L3 Turbo].)
5 | VERIFY CURRENT INPUT SIGNAL STATUS OF HO2S • Connect the WDS or equivalent to the DLC-2. • Start the engine and warm it up completely. • Access O2S12 PID. • Read O2S12 PID under the following accelerator pedal condition (in NEUTRAL). - 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) • Is the PID normal? | Yes | Go to the next step.
No | Visually inspect for the exhaust gas leakage between the TWC and HO2S. • If there is no leakage, replace the HO2S. (See EXHAUST SYSTEM REMOVAL/INSTALLATION [L3 Turbo].) Then go to Step 20.
6 | VERIFY CURRENT INPUT SIGNAL STATUS • Connect the WDS or equivalent to the DLC-2. • Verify the following PIDs. (See PCM INSPECTION [L3 Turbo].) - 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 20.
7 | VERIFY CURRENT INPUT SIGNAL STATUS UNDER FREEZE FRAME DATA CONDITION • Connect the WDS or equivalent to the DLC-2. • Verify the following PIDs under the FREEZE FRAME DATA condition. (See PCM INSPECTION [L3 Turbo].) - 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 20.
8 | VERIFY CURRENT INPUT SIGNAL STATUS OF A/F SENSOR • Connect the WDS or equivalent to the DLC-2. • Start the engine and warm it up completely. • Access the O2S11 PID. • Read the O2S11 PID under following accelerator pedal condition (in NEUTRAL). - -0.1-0.1A when idle. - More than 0.25 mA just after release of accelerator pedal (lean condition). • Is the PID normal? | Yes | Go to the next step.
No | Visually inspect for the exhaust gas leakage between the exhaust manifold and A/F sensor. • If there is no leakage, replace A/F sensor. (See EXHAUST SYSTEM REMOVAL/INSTALLATION [L3 Turbo].) Then go to Step 20.
9 | 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.
10 | INSPECT INTAKE-AIR SYSTEM FOR EXCESSIVE AIR SUCTION • Visually inspect the hose in intake-air system for looseness, cracks or damages. • Is there any malfunction? | Yes | Repair or replace the malfunctioning part, then go to Step 20.
No | Go to the next step.
11 | INSPECT IGNITION COIL WIRING HARNESSES • Inspect the ignition coil related wiring harness condition (intermittent open or short circuit) for all cylinders. • Are wiring harness conditions normal? | Yes | Go to the next step.
No | Repair the wiring harnesses, then go to Step 20.
12 | INSPECT IGNITION SYSTEM OPERATION • 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 result. Then go to Step 20.
13 | INSPECT ENGINE COMPRESSION • Inspect the engine compression. (See COMPRESSION INSPECTION [L3 Turbo].) • Is there any malfunction? | Yes | Go to the next step.
No | Overhaul the engine, then go to Step 20.
14 | INSPECT FUEL PRESSURE (HIGH-SIDE) • Access and monitor FUEL_PRES PID. • Is the FUEL_PRES PID value within the specified? (See Using the WDS or Equivalent.) | Yes | Go to Step 18.
No | Go to the next step.
15 | 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 17.
16 | INSPECT FUEL PRESSURE SENSOR • Inspect the fuel pressure sensor. (SeeFUEL PRESSURE SENSOR INSPECTION [L3 Turbo].) • Is the fuel pressure sensor normal? | Yes | Go to Step 18.
No | Replace the fuel delivery pipe, then go to Step 20.
17 | INSPECT HIGH PRESSURE FUEL PUMP • Replace the high pressure fuel pump. • Monitor FUEL_PRES PID. • Is the FUEL_PRES PID value within the specified? (SeeUsing the WDS or Equivalent.) | Yes | Go to Step 20.
No | Go to the next step.
18 | INSPECT FUEL PRESSURE (LOW-SIDE) • Connect the fuel pressure gauge between fuel pump and high pressure fuel pump. • Measure the low side fuel pressure. (SeeFUEL LINE PRESSURE INSPECTION [L3 Turbo].) • 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.
19 | INSPECT FUEL INJECTOR • Inspect the fuel injector. (See FUEL INJECTOR INSPECTION [L3 Turbo].) • Is there any malfunction? | Yes | Replace the fuel injector, then go to the next step. (See FUEL INJECTOR REMOVAL/INSTALLATION [L3 Turbo].)
No | Go to the next step.
20 | VERIFY TROUBLESHOOTING OF DTC P2096 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. (See OBD DRIVE MODE [L3 Turbo].) • Is the PENDING CODE for this DTC present? | Yes | Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [L3 Turbo].)
No | Go to the next step.
21 | VERIFY AFTER REPAIR PROCEDURE • Perform the "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE [L3 Turbo].) • Are any DTCs present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE [L3 Turbo].)
No | Troubleshooting completed.