DTC P2196 [L3 Turbo]

id0102b7812800

DTC P2196

A/F SENSOR signal stuck rich

DETECTION CONDITION

•  The PCM monitors the A/F sensor output when the following conditions are met. If the output is less than 0.85 for 25 s, the PCM determines that the A/F sensor has a malfunction.

MONITORING CONDITION

―  ECT: more than 70 °C {158 °F}

―  Engine speed: 1,000—3,200 rpm

―  Charging efficiency: 20—62.5%

―  Output voltage from the HO2S: 0.7 V or less

Diagnostic support note

•  This is an intermittent monitor (A/F sensor, HO2S).

•  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.

•  DTCs are stored in the PCM memory.

POSSIBLE CAUSE

•  Restriction in intake-air system

•  MAF sensor malfunction

•  Exhaust system leakage

•  A/F sensor malfunction

•  Fuel injector malfunction

•  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

•  Excessive fuel pressure

•  PCM malfunction

DTC P2196	A/F SENSOR signal stuck rich
DETECTION CONDITION	• The PCM monitors the A/F sensor output when the following conditions are met. If the output is less than 0.85 for 25 s, the PCM determines that the A/F sensor has a malfunction. MONITORING CONDITION ― ECT: more than 70 °C {158 °F} ― Engine speed: 1,000—3,200 rpm ― Charging efficiency: 20—62.5% ― Output voltage from the HO2S: 0.7 V or less Diagnostic support note • This is an intermittent monitor (A/F sensor, HO2S). • 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. • DTCs are stored in the PCM memory.
POSSIBLE CAUSE	• Restriction in intake-air system • MAF sensor malfunction • Exhaust system leakage • A/F sensor malfunction • Fuel injector malfunction • 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 • Excessive fuel pressure • 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 (A/F sensor, HO2S 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 OR STORED DTC • Turn the ignition switch to 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. (SeeDTC TABLE [L3 Turbo].)
3		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.
4		No	Go to FREEZE FRAME DATA DTC inspection. (SeeDTC TABLE [L3 Turbo].)
5	VERIFY CURRENT INPUT SIGNAL STATUS OF MAF SENSOR • Connect the M-MDS 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.
5		No	Visually inspect for air restriction in intake-air system. • If there is no air restriction in intake-air system, replace the MAF/IAT sensor, then go to Step 13.
6	INSPECT A/F SENSOR • Inspect the A/F sensor. (SeeAIR FUEL RATIO (A/F) SENSOR, HEATED OXYGEN SENSOR (HO2S) INSPECTION [L3 Turbo].) • Is there any malfunction?	Yes	Visually inspect for any gas leakage between the exhaust manifold and the A/F sensor. • If there is no leakage, replace the A/F sensor. (SeeAIR FUEL RATIO (A/F) SENSOR, HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [L3 Turbo].) Then go to Step 13.
6		No	Go to the next step.
7	INSPECT FUEL INJECTOR • Inspect the fuel injector. (SeeFUEL INJECTOR INSPECTION [L3 Turbo].) • Is there any malfunction?	Yes	Replace the suspected fuel injector, then go to Step 13. (SeeFUEL INJECTOR REMOVAL/INSTALLATION [L3 Turbo].)
7		No	Go to the next step.
8	INSPECT FUEL PRESSURE (HIGH-SIDE) • Access and monitor FRP PID. • Is the FRP PID value within the specified? (SeePCM INSPECTION [L3 Turbo].)	Yes	Go to Step 12.
8		No	Go to the next step.
9	IDENTIFY CAUSE BY FUEL PRESSURE SENSOR OR HIGH PRESSURE FUEL PUMP • Is the vehicle accelerate performance normally?	Yes	Go to the next step.
9		No	Go to Step 13.
10	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 12.
10		No	Replace the fuel delivery pipe, then go to Step 13.
11	INSPECT HIGH PRESSURE FUEL PUMP • Replace the high pressure fuel pump (See HIGH PRESSURE FUEL PUMP REMOVAL/INSTALLATION [L3 Turbo].) • Monitor FUEL_PRES PID • Is the FUEL_PRES PID value within the specified? (SeePCM INSPECTION [L3 Turbo].)	Yes	Go to Step 13.
11		No	Go to the next step.
12	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.
12		No	Inspect for following: • Fuel line restriction • Fuel filter clogging If okay replace the fuel pump. Then go to the next step.
13	VERIFY TROUBLESHOOTING OF DTC P2196 COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. • Perform the PCM Adopted Memory Produce Drive Mode and A/F sensor heater, HO2S heater, A/F sensor, HO2S and TWC Repair Verification Drive Mode. (SeeOBD DRIVE MODE [L3 Turbo].) • Is the PENDING CODE for this DTC present?	Yes	Replace the PCM, then go to the next step. (SeePCM REMOVAL/INSTALLATION [L3 Turbo].)
13		No	Go to the next step.
14	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (SeeAFTER REPAIR PROCEDURE [L3 Turbo].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (SeeDTC TABLE [L3 Turbo].)
14		No	Troubleshooting completed.