DTC P2196

DTC P2196  : O 2 Sensor Signal Biased/Stuck Rich

NOTE: 

• Before you troubleshoot, review the general troubleshooting information .
• If any of the DTCs listed below are stored at the same time as DTC P2196, troubleshoot those DTCs first, then recheck for P2196.

  P0131, P0132, P0133, P2195: A/F sensor (Sensor 1)

  P0134, P0135: A/F sensor (Sensor 1) heater

  P0137, P0138, P0139, P2270, P2271: Secondary HO2S (Sensor 2)

  P0140, P0141: Secondary HO2S (Sensor 2) heater

  P0171, P0172: Fuel system

  P0201, P0202, P0203, P0204: No. 1-No. 4 cylinder injector (s)

  P0300: Random misfire

  P0301, P0302, P0303, P0304: No. 1-No. 4 cylinder misfire

  P0351, P0352, P0353, P0354: No. 1-No. 4 cylinder ignition coil (s)

  P219C, P219D, P219E, P219F: No. 1-No. 4 cylinder A/F variation

DTC (PGM-FI)

1. Problem verification

   -1. Turn the vehicle to the ON mode.

   -2. Clear the DTC with the HDS.

   Clear DTC

   -3. Start the engine.

   -4. Hold the engine speed at 3, 000 rpm without load (in neutral) until the radiator fan comes on, then let it idle.

   Test-drive the vehicle for several minutes in the range of these recorded on-board snapshot parameters:

   • Engine Speed
   • Vehicle Speed
   • ECT Sensor 1

   On-board Snapshot

   Signal	Current conditions
   	Values	Unit
   Engine Speed
   Vehicle Speed
   ECT Sensor 1

   -6. Monitor the OBD STATUS for DTC P2196 with the HDS.

   DTC Description	OBD STATUS
   P2196 O 2 Sensor Signal Biased/Stuck Rich

   Does the HDS indicate FAILED?

   YES 

   The failure is duplicated. Go to step 2.

   NO 

   If the HDS indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the A/F sensor (Sensor 1), secondary HO2S (Sensor 2), and the PCM. If the on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the on-board snapshot . If the HDS indicates EXECUTING, keep the test conditions until a result comes on. If the HDS indicates OUT OF CONDITION, go to step 1-5 and recheck.

2. Exhaust system check

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Check for leakage, clogging, or blockage in the exhaust system.

   Is there leakage in the exhaust system between the A/F sensor (Sensor 1) and secondary HO2S (Sensor 2), or any clogging or restrictions in the exhaust system?

   YES 

   Repair or replace the exhaust system .

   NO 

   Go to step 3.

3. A/F sensor (Sensor 1) check

   -1. Substitute a known-good A/F sensor (Sensor 1) .

   -2. Reconnect all connectors.

   -3. Turn the vehicle to the ON mode.

   -4. Reset the PCM with the HDS .

   Reset PCM

   -5. Do the fuel learn procedure .

   -6. Start the engine.

   -7. Hold the engine speed at 3, 000 rpm without load (in neutral) until the radiator fan comes on, then let it idle.

   Test-drive the vehicle for several minutes in the range of these recorded on-board snapshot parameters:

   • Engine Speed
   • Vehicle Speed
   • ECT Sensor 1

   On-board Snapshot

   Signal	Current conditions
   	Values	Unit
   Engine Speed
   Vehicle Speed
   ECT Sensor 1

   -9. Monitor the OBD STATUS for DTC P2196 with the HDS.

   DTC Description	OBD STATUS
   P2196 O 2 Sensor Signal Biased/Stuck Rich

   Does the HDS indicate PASSED?

   YES 

   Replace the original A/F sensor (Sensor 1) .

   NO 

   If the HDS indicates FAILED, replace secondary HO2S (Sensor 2) . If the HDS indicates EXECUTING, keep the test conditions until a result comes on. If the HDS indicates OUT OF CONDITION, go to step 3-8 and recheck.