DTC Troubleshooting

WARNING: This page is about a different car, the 2010 Suzuki Kizashi. However, it is still accessible from the selected car via links, so may be relevant.

DIAGNOSTIC PROCEDURES 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 any DTC(s) other than P0137 and P0138?	Go to troubleshooting for applicable DTC.	Go to Step 3.
3	HO2S signal circuit and ground circuit check Confirm that ignition mode of keyless push start system is "OFF". Disconnect "C01", "E01" and HO2S connectors. Check for proper terminal connection to "C01", "E01" and HO2S connectors. If connections are OK, check the following points. Resistance of "A3" and "A4" circuits: less than 1 Ω Resistance of "A3" and "A4" circuits between HO2S connector and ground: infinity Resistance between "A3" circuit terminal and each terminal at HO2S connector: infinity Resistance between "A4" circuit terminal and each terminal at HO2S connector: infinity Voltage of "A3" and "A4" circuits: 0 - 1 V (with ignition mode of keyless push start system in "ON") Are they in good condition?	Go to Step 4.	Repair or replace defective wire harness.
4	Exhaust system and air intake system check Check exhaust system and air intake system for clogging or leak. Are they in good condition?	Go to Step 5.	Repair or replace defective part.
5	HO2S heater circuit check Check "A1" and "A2" circuits according to Step 2 through Step 3 under DTC P0037/P0038 . Are they in good condition?	Go to Step 6.	Repair or replace defective part.
6	DTC recheck Replace HO2S, see A/F SENSOR AND HO2S REMOVAL AND INSTALLATION . Perform DTC confirmation procedure and check DTC. Is DTC P0137 or P0138 still detected?	Replace ECM and recheck DTC, see ECM REMOVAL AND INSTALLATION .	End.