P2096, P2098, P2097, P2099 Code

P2096, P2098, P2097, P2099 Code - This diagnostic runs continuously with the engine running in closed loop, the Powertrain Control Module (PCM) detects an abnormally lean condition based on the Downstream O2 sensor signal input. MIL light illuminate

P2096, P2098, P2097, P2099 Code

Possible causes P2096, P2098, P2097, P2099 Code

- Exhaust leak
- Fuel delivery system
- O2 sensor, wiring or connectors
- Engine Mechanical system
- Powertrain Control Module (PCM)

Diagnostic test P2096, P2098, P2097, P2099 Code

Step 1. Check for an active DTC
Diagnostic and repair any other active component or circuit DTCs before continuing with this procedure. Turn the ignition on, with the scan tool read and record on the repair order. Copy DTC and freeze frame information. Start the engine and allow it to reach operating temperature.

When the engine is operating, do not stand in direct line the fan. Do not put your hands near the pulleys, belts or fan. Do not wear lose clothing. Failure to follow these instructions may result in possible serious or fatal injury.

Attempt to operate the vehicle under conditions similiar to which the DTC was set. It may be necessary to test drive the vehicle within the DTC monitoring conditions in order for this DTC to set. With the scan tool read DTCs and record on the repair order.

Is the DTC active or pending?

Yes, go to step 2.
No, perform the PCM intermittent condition.

Step 2. Exhaust leak
A thorough exhaust leak test should be completed before removing an O2 sensor or any other part from the exhaust system. Do not remove any parts before an exhaust leak check has been completed. An exhaust leak may cause downstream fuel adaptives to rail out, resulting in a false O2 sensors failure.
Perform the CHECKING THE EXHAUST SYSTEM FOR LEAKS diagnostic procedure.

Were any problems found?

Yes, repair the exhaust leaks in accordance with the service information.
No, go to step 3.

Step 3. Checking the fuel delivery system
Perform the CHECKING THE FUEL DELIVERY SYSTEM diagnostic procedure.

Were any problems found?

Yes, repair as necessary in accordance with the service information.
No, go to step 4.

Step 4. Checking the oxygen sensor operation
Perform the diagnostic procedure for CHECKING THE OXYGENT SENSOR OPERATION

Were any problems found?

Yes, repair as necessary  in accordance with the service information.
No, go to step 5.

Step 5. Checking the engine mechanical system
Perform the diagnostic procedure for CHECKING THE ENGINE MECHANICAL SYSTEM.

Were any probelms found?

Yes, repair as necessary in accordance with the service information.
No, go to step 6

Step 6. Check related PCM and component connections

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