DTC P2270

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

DTC (PGM-FI)

1. Problem verification

   -1. Turn the vehicle to the ON mode.

   -2. Clear the DTC with the HDS.

   -3. Turn the vehicle to the OFF (LOCK) mode.

   -4. Enter the maintenance mode, then start the engine .

   -5. Hold the engine speed at 3000 RPM without load (in P or N) until the radiator fan comes on, then let it idle.

   -6. Test-drive the vehicle under these conditions:

   • Engine coolant temperature (ECT SENSOR 1) above 158 deg.F (70 deg.C)
   • Transmission in D
   • Engine speed between 1500 - 3000 RPM
   • Drive 30 seconds or more

   Signal	Current conditions
   	Values	Unit
   ECT Sensor 1
   Engine Speed

   Data List

   -7. Monitor the OBD STATUS for DTC P2270 in the DTCs MENU with the HDS.

   DTC Description	OBD Status
   P2270 Secondary HO2 (Sensor 2) Circuit Signal Stuck Lean

   OBD Status

   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 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 driving until a result comes on. If the HDS indicates OUT OF CONDITION, go to step 1-4 and recheck.