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DTC Troubleshooting

P0133 DIAGNOSIS PROCEDURE

Step Action YES NO
1  Was "Engine and Emission Control System Check" performed?  Go to Step 2. Go to ENGINE AND EMISSION CONTROL SYSTEM CHECK:J24B .
2  DTC check 
Is there any DTC(s) other than P0133? 		 Go to troubleshooting for applicable DTC. Go to Step 3.
3  A/F sensor signal circuit check 
  1. Check A/F sensor signal circuit referring to Step 3 of DTC P0131/P0132/P0134/P2195/P2196/P2237  .

Are they in good condition? 		 Go to Step 3. Repair or replace defective wire harness.
4  DTC recheck 
  1. Replace A/F sensor, see A/F (AIR FUEL RATIO) SENSOR, HO2S (HEATED OXYGEN SENSOR) REMOVAL AND INSTALLATION .
  2. Perform DTC confirmation procedure and check DTC.

Is DTC P0133 still detected? 		 Substitute a known-good ECM and recheck. End.
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