DTC P2270: Secondary HO2S (Sensor 2) Circuit Signal Stuck Lean

NOTE:  Before you troubleshoot, review the general troubleshooting information - Refer to: How to Troubleshoot the Fuel and Emissions SystemsHow to Troubleshoot the CVT System(CVT System) .

DTC (PGM-FI)

• 1. Problem verification:

  - 1. Turn the vehicle to the ON mode.

  - 2. Clear the DTC with the HDS.

  - 3. Start the engine.

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

  - 5. Test-drive under these conditions:

  • Engine coolant temperature (ECT SENSOR 1) above 158°F (70°C)
  • Transmission in D
  • Engine speed between 1, 500-3, 000 rpm
  • Drive 30 seconds or more

  Signal	Current conditions
  	Values	Unit
  ECT SENSOR 1
  ENGINE SPEED

  - 6. Monitor the OBD STATUS for DTC P2270 in the DTCs MENU with the HDS.

  DTC Description	OBD Status
  P2270 Secondary HO2S (Sensor 2) Circuit Signal Stuck Lean

  Does the HDS indicate FAILED?

  YES 

  The failure is duplicated. Replace secondary HO2S (Sensor 2) .

  NO 

  If the HDS indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at secondary HO2S (Sensor 2) and the PCM. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot. If the HDS indicates EXECUTING, keep driving until a result comes on. If the HDS indicates OUT OF CONDITION, go to step 1-3 and recheck.