DTC P0133, P0153

DTC P0133  : Rear A/F Sensor (Bank 1, Sensor 1) Malfunction/Slow Response DTC P0153  : Front A/F Sensor (Bank 2, Sensor 1) Malfunction/Slow Response

NOTE: 

• Before you troubleshoot, review the general troubleshooting information .
• If DTC P0139 and/or P0159 * is stored at the same time as DTC P0133 and/or P0153 *, troubleshoot DTC P0139 and/or P0159 * first, then recheck for DTC P0133 and/or P0153 *.
• Information marked with an asterisk (*) applies to the front bank (Bank 2).

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, 500-2, 500 rpm
   • Drive the vehicle at 25 mph (40 km/h) or less for 5 minutes, then drive at a steady speed of 36 mph (57 km/h) or more

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

   -6. Monitor the OBD STATUS for DTC P0133 and/or P0153 * in the DTCs MENU with the HDS.

   DTC Description	OBD STATUS
   P0133 Rear A/F Sensor (Bank 1, Sensor 1) Malfunction/Slow Response
   P0153 Front A/F Sensor (Bank 2, 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 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 1-3 on this step and recheck.