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DTC Troubleshooting

P011B 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  ECT sensor circuit check 
  1. Check ECT sensor circuit referring to Step 3 of DTC P0116/P0125/P0128 .

Are they in good condition? 		 Go to Step 3. Repair or replace defective wire harness.
3  IAT sensor circuit check 
  1. Check IAT sensor circuit referring to Step 3 of DTC P0111: Intake Air Temperature Sensor 1 Circuit Range Performance .

Are they in good condition? 		 Go to Step 4. Repair or replace defective wire harness.
4  ECT sensor check 
  1. Check ECT sensor, see ECT (ENGINE COOLANT TEMPERATURE) SENSOR INSPECTION .

Is it in good condition? 		 Go to Step 5 Replace ECT sensor.
5  IAT sensor check 
  1. Check IAT sensor, see MAF (MASS AIR FLOW) AND IAT (INTAKE AIR TEMPERATURE) SENSOR INSPECTION .

Is it in good condition? 		 Substitute a known-good ECM and recheck. Replace MAF and IAT sensor.
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