DTC P2096:00 [ZJ, ZY]

id0102c0707500

DTC P2096:00

Target A/F feedback system too lean

DETECTION CONDITION

•  If the fuel correction amount corresponding to the HO2S target voltage exceeds the specified value while performing HO2S feedback correction.

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.

•  The DTC is stored in the PCM memory.

POSSIBLE CAUSE

•  HO2S malfunction

―  Leakage exhaust gas

―  HO2S malfunction

•  IAT sensor malfunction

•  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 malfunction

―  Leakage exhaust gas

―  A/F sensor malfunction

•  MAF sensor malfunction

•  Air suction in intake-air system

•  Fuel supply system malfunction or insufficient fuel line pressure

―  Fuel leakage from fuel system

―  Pressure regulator (built-in fuel pump unit) malfunction

―  Fuel pump unit malfunction

•  Ignition system malfunction

―  Ignition coil and related wiring harness malfunction

―  Spark plug malfunction

•  Insufficient engine compression

•  Improper operation of fuel injector

•  ECT sensor malfunction

•  PCM malfunction

DTC P2096:00	Target A/F feedback system too lean
DETECTION CONDITION	• If the fuel correction amount corresponding to the HO2S target voltage exceeds the specified value while performing HO2S feedback correction. 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. • The DTC is stored in the PCM memory.
POSSIBLE CAUSE	• HO2S malfunction ― Leakage exhaust gas ― HO2S malfunction • IAT sensor malfunction • 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 malfunction ― Leakage exhaust gas ― A/F sensor malfunction • MAF sensor malfunction • Air suction in intake-air system • Fuel supply system malfunction or insufficient fuel line pressure ― Fuel leakage from fuel system ― Pressure regulator (built-in fuel pump unit) malfunction ― Fuel pump unit malfunction • Ignition system malfunction ― Ignition coil and related wiring harness malfunction ― Spark plug malfunction • Insufficient engine compression • Improper operation of fuel injector • ECT sensor malfunction • PCM malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAVE BEEN RECORDED • Have the FREEZE FRAME DATA and DIAGNOSTIC MONITORING TEST RESULTS (fuel system related) been recorded?	Yes	Go to the next step.
1		No	Record the FREEZE FRAME DATA and DIAGNOSTIC MONITORING TEST RESULTS on the repair order, then go to the next step.
2	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.
2		No	Go to the next step.
3	VERIFY RELATED PENDING CODE AND STORED DTC • Turn the ignition switch off, then ON position (engine off). • Verify the related PENDING CODE and stored DTCs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [ZJ, ZY].) • Is the DTC P2177:00 or P2187:00 also present?	Yes	Go to the applicable DTC inspection. (See DTC P2177:00 [ZJ, ZY].) (See DTC P2187:00 [ZJ, ZY].)
3		No	Go to the next step.
4	IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA • Is the DTC P2096:00 on FREEZE FRAME DATA?	Yes	Go to the next step.
4		No	Go to the troubleshooting procedures for DTC on FREEZE FRAME DATA. (See DTC TABLE [ZJ, ZY].)
5	INSPECT HO2S • Inspect the HO2S. (See HEATED OXYGEN SENSOR (HO2S) INSPECTION [ZJ, ZY].) • Is there any malfunction?	Yes	Go to the next step.
5		No	Go to Step 7.
6	INSPECT GAS LEAKAGE FROM EXHAUST SYSTEM • Visually inspect if there is exhaust gas leakage between the TWC and HO2S. • Is there gas leakage?	Yes	Repair or replace the malfunctioning part according to the inspection results, then go to Step 21.
6		No	Replace the HO2S, then go to Step 21. (See HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [ZJ, ZY].)
7	INSPECT IAT SENSOR • Inspect the IAT sensor. (See INTAKE AIR TEMPERATURE (IAT) SENSOR INSPECTION [ZJ, ZY].) • Is there any malfunction?	Yes	Replace the MAF/IAT sensor, then go to Step 21. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [ZJ, ZY].)
7		No	Go to the next step.
8	VERIFY CURRENT INPUT SIGNAL STATUS • Connect the M-MDS to the DLC-2. • Perform the PID/DATA Monitor and Record Procedure and access the following PIDs: (See ON-BOARD DIAGNOSTIC TEST [ZJ, ZY].) ― APP ― ECT ― MAF ― TP REL ― VSS • Are all PIDs normal? (See PCM INSPECTION [ZJ, ZY].)	Yes	Go to the next step.
8		No	Repair or replace the malfunctioning part according to the inspection results, then go to Step 21.
9	VERIFY CURRENT INPUT SIGNAL STATUS UNDER FREEZE FRAME DATA CONDITION • Perform the PID/DATA Monitor and Record Procedure and access the same PIDs as in Step 8 under the FREEZE FRAME DATA. (See ON-BOARD DIAGNOSTIC TEST [ZJ, ZY].) • Are all PIDs normal?	Yes	Go to the next step.
9		No	Repair or replace the malfunctioning part according to the inspection results, then go to Step 21.
10	INSPECT A/F SENSOR • Inspect the A/F sensor. (See AIR FUEL RATIO (A/F) SENSOR INSPECTION [ZJ, ZY].) • Is there any malfunction?	Yes	Go to the next step.
10		No	Go to Step 12.
11	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 21.
11		No	Replace the A/F sensor, then go to Step 21. (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [ZJ, ZY].)
12	VERIFY CURRENT INPUT SIGNAL STATUS OF MAF SENSOR • Connect the M-MDS to the DLC-2. • Start the engine. • Perform the PID/DATA Monitor and Record Procedure and access the MAF PID. (See ON-BOARD DIAGNOSTIC TEST [ZJ, ZY].) • Verify that the MAF PID changes quickly according to race the engine speed. • Is the PID normal?	Yes	Go to the next step.
12		No	Replace MAF/IAT sensor, then go to Step 21. (See MASS AIR FLOW (MAF)/INTAKE AIR TEMPERATURE (IAT) SENSOR REMOVAL/INSTALLATION [ZJ, ZY].)
13	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 21.
13		No	Go to the next step.
14	INSPECT FUEL LINE PRESSURE • Perform the ”FUEL LINE PRESSURE INSPECTION”. (See FUEL LINE PRESSURE INSPECTION [ZJ, ZY].) • Is there any malfunction?	Yes	Go to the next step.
14		No	Go to Step 16.
15	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 21.
15		No	Replace the fuel pump unit, then go to Step 21. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [ZJ, ZY].)
16	INSPECT IGNITION COIL AND RELATED WIRING HARNESS • Inspect the ignition coil and related wiring harness condition (intermittent open or short circuit) for all cylinders. (See IGNITION COIL INSPECTION [ZJ, ZY].) • Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results, then go to Step 21. (See IGNITION COIL REMOVAL/INSTALLATION [ZJ, ZY].)
16		No	Go to the next step.
17	INSPECT IGNITION SYSTEM OPERATION • Perform the Spark Test. (See.ENGINE CONTROL SYSTEM OPERATION INSPECTION [ZJ, ZY]) • Is the strong blue spark visible at each cylinder?	Yes	Go to the next step.
17		No	Repair or replace the malfunctioning part according to the inspection results, then go to Step 21.
18	INSPECT ENGINE COMPRESSION • Inspect the engine compression. (See COMPRESSION INSPECTION [ZJ, ZY].) • Is there any malfunction?	Yes	Implement engine overhaul for repairs, then go to Step 21.
18		No	Go to the next step.
19	INSPECT FUEL INJECTOR OPERATION • Perform the Fuel Injector Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [ZJ, ZY].) • Does the fuel injector work properly?	Yes	Go to the next step.
19		No	Repair or replace the malfunctioning part according to the inspection results, then go to Step 21.
20	INSPECT ECT SENSOR • Inspect the ECT sensor. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [ZJ, ZY].) • Is there any malfunction?	Yes	Replace the ECT sensor, then go to the next step. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION [ZJ, ZY].)
20		No	Go to the next step.
21	VERIFY DTC TROUBLESHOOTING COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. (See AFTER REPAIR PROCEDURE [ZJ, ZY].) • Perform the Drive Mode 01 (PCM Adaptive Memory Produce Drive Mode). (See OBD DRIVE MODE [ZJ, ZY].) • Is the PENDING CODE for this DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [ZJ, ZY].)
21		No	Go to the next step.
22	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [ZJ, ZY].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [ZJ, ZY].)
22		No	DTC troubleshooting completed.