DTC Troubleshooting

WARNING: This page is about a different car, the 2006 Suzuki Grand Vitara. However, it is still accessible from the selected car via links, so may be relevant.

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	DTC check Is there DTC P0171 or P0172?	Go to applicable DTC diagnostic flow chart.	Go to Step 3.
3	Intake system and exhaust system for leakage check Check intake system and exhaust system for leakage. Is it in good condition?	Go to Step 4.	repair or replace defective parts.
4	A/F sensor circuit check Disconnect connector from A/F sensor (bank-1) with ignition switch turned OFF. Check for proper terminal connection to A/F sensor (bank-1) connector. If connections are OK, check that A/F sensor (bank-1) circuit is as follows. Wiring harness resistance of each "Signal (+) circuit of A/F sensor (bank-1)", "Signal (-) circuit of A/F sensor (bank-1)", "Adjusting resistor (+) circuit of A/F sensor (bank-1)" and "Adjusting resistor (-) circuit A/F sensor (bank-1)" is less than 1 Ω. Is it in good condition?	Replace A/F sensor (bank-1).	Repair or replace defective wiring harness.