DTC Troubleshooting

NOTE: Before this trouble shooting is performed, read the precautions for DTC troubleshooting referring to PRECAUTIONS FOR 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	Do you have SUZUKI scan tool?	Go to Step 3.	Go to Step 5.
3	EGR valve operation check With ignition switch OFF, install SUZUKI scan tool. Check EGR system referring to EGR SYSTEM INSPECTION (USING SUZUKI SCAN TOOL) . Is it in good condition?	Go to Step 4.	Go to Step 5.
4	MAP sensor check Check MAP sensor for performance referring to MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR INSPECTION . Is check result satisfactory?	Intermittent trouble or faulty ECM. Check for intermittent referring to INTERMITTENT AND POOR CONNECTION INSPECTION .	Replace MAP sensor.
5	EGR valve control circuit check Check that EGR valve control circuits are in good condition referring to Step 3 of DTC P0403: EXHAUST GAS RECIRCULATION CONTROL CIRCUIT . Are circuits in good condition?	Go to Step 6.	Repair or replace EGR valve control circuit(s).
6	EGR valve check Check EGR valve referring to PCV VALVE INSPECTION . Is check result satisfactory?	Go to Step 7.	Faulty EGR valve.
7	MAP sensor check Check MAP sensor for performance referring to MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR INSPECTION . Is check result satisfactory?	EGR passage clogged. If OK, substitute a known-good ECM and recheck.	Replace MAP sensor.