DTC P0133

DTC P0133  : A/F Sensor (Sensor 1) Malfunction/Slow Response

NOTE: 

• Before you troubleshoot, review the general troubleshooting information .
• If DTC P0139 is stored at the same time as DTC P0133, troubleshoot DTC P0139 first, then recheck for DTC P0133.

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. Hold the engine speed at 3, 000 rpm without load (CVT in P or N, M/T in neutral) until the radiator fan comes on, then let it idle.

   -4. Test-drive under these conditions:

   • Engine coolant temperature (ECT SENSOR 1) above 158 deg. F (70 deg. C)
   • CVT in D, M/T in 3rd or 4th
   • Engine speed between 1, 400-3, 300 rpm
   • Drive the vehicle at 25 mph (40 km/h) or less for 5 minutes, then drive at a steady speed of 32 mph (52 km/h) or more

   Signal	Current conditions
   	Values	Unit
   ECT SENSOR 1
   ENGINE SPEED
   VEHICLE SPEED

   -5. Monitor the OBD STATUS for DTC P0133 in the DTCs MENU with the HDS.

   DTC Description	OBD STATUS
   P0133 A/F Sensor (Sensor 1) Malfunction/Slow Response

   Does the HDS indicate FAILED?

   YES 

   Replace the A/F sensor (Sensor 1) .

   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) 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 on this step and recheck.