DTC Troubleshooting

DTC TROUBLESHOOTING CHART

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 .
2	Barometric pressure (EVAP leak check pressure) sensor check Check EVAP leak check pressure sensor for performance referring to "EVAP Leak Check Pressure Sensor (combine with BARO sensor) Inspection" under EVAP LEAK CHECK MODULE INSPECTION . Are they in good condition?	Go to Step 3.	Replace EVAP leak check module.
3	EVAP system check Check the following parts for clogged. EVAP canister EVAP canister air suction filter EVAP passage EVAP canister vent valve in EVAP leak check module Are they in good condition?	Go to Step 4.	Clean, repair or replace.
4	MAP sensor check Check MAP sensor for performance referring to MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR INSPECTION . Is it in good condition?	Substitute a known-good ECM and recheck.	Repair or replace.