Test Description

WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

1: The Diagnostic System Check - Vehicle prompts the technician to complete some basic checks and store the Freeze Frame data on the scan tool, if applicable. This creates an electronic copy of the data taken when the fault occurred. The information is then stored in the scan tool for later reference.
2: This step determines wether a condition currently exists.
3: This step isolates the condition. If the DTC for only one bank sets, inspect and test for a condition that would affect only one bank of the engine.

DTC P2297 or P2298

Step	Action	Yes	No
Schematic Reference: Engine Controls Schematics Connector End View Reference: Powertrain Control Module Connector End Views or Engine Controls Connector End Views
1	Did you perform the Diagnostic System Check - Vehicle?	Go to Step 2	Go to Diagnostic System Check - Vehicle
2	IMPORTANT: If any DTCs are set, except P2297 and P2298, refer to those DTCs before proceeding with this diagnostic. DTC P2297 is for bank 1 sensor 1 - rear and DTC P2298 is for bank 2 sensor 1 - front. Observe the Freeze Frame/Failure Records for this DTC. Turn OFF the ignition for 90 seconds. Start the engine. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records. Did the DTC fail this ignition?	Go to Step 3	Go to Diagnostic Aids
3	Did a DTC for both banks set?	Go to Step 4	Go to Step 5
4	Visually and physically inspect for any of the following conditions: Inspect the vacuum hoses for splits, kinks, and proper connection. Refer to Emission Hose Routing Diagram . Inspect the positive crankcase ventilation (PCV) valve and system for leaks. Inspect for a collapsed air intake duct. Inspect for a restricted air filter element. Refer to Air Cleaner Element Replacement . Inspect for excessive fuel in the crankcase. Change the oil as necessary. Test the fuel system for operating rich or lean. Refer to Fuel System Diagnosis . Inspect for contaminated fuel. Refer to Alcohol/Contaminants-in-Fuel Diagnosis . Inspect the evaporative emission (EVAP) control system for the correct operation. Refer to Evaporative Emission Control System Description . Inspect the exhaust gas recirculation (EGR) value for the correct operation. Refer to Exhaust Gas Recirculation (EGR) System Description . Inspect the engine control grounds for being clean, tight, and in the correct locations. Inspect for an engine mechanical condition. Refer to Symptoms - Engine Mechanical . Did you find and correct the condition?	Go to Step 8	Go to Step 6
5	Visually and physically inspect for any of the following conditions: Test for restricted or leaking fuel injectors. Refer to Fuel Injector Balance Test with Tech 2 , Fuel Injector Balance Test with Special Tool , and Fuel Injector Solenoid Coil Test . Inspect for exhaust leaks, missing or loose exhaust hardware. Refer to Exhaust Leakage . Inspect for a restricted exhaust. Refer to Restricted Exhaust . Inspect that the HO2S is installed securely and the electrical connector is not contacting the exhaust system. Inspect for an engine mechanical condition. Refer to Symptoms - Engine Mechanical . Inspect for vacuum leaks that only affect one bank of the engine. For example, the intake manifold, the injector O-rings. Did you find and correct the condition?	Go to Step 8	Go to Step 6
6	Test for an intermittent and for a poor connection at the HO2S sensor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition?	Go to Step 8	Go to Step 7
7	Replace the HO2S sensor. Refer to Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 or Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 . Did you complete the replacement?	Go to Step 8	-
8	Clear the DTCs with a scan tool. Turn OFF the ignition for 30 seconds. Start the engine. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records. Did the DTC fail this ignition?	Go to Step 2	Go to Step 9
9	Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed?	Go to Diagnostic Trouble Code (DTC) List - Vehicle	System OK