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 number below refers to the step number 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.

DTC P0301-P0306

Step	Action	Values	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	Were you sent here from DTC P0300?	-	Go to Step 3	Go to DTC P0300
3	Turn OFF the ignition. Remove the ignition coil of the misfiring cylinder, but leave the electrical connector connected. Refer to the appropriate procedure: Ignition Coil Replacement - Bank 1 Ignition Coil Replacement - Bank 2 Inspect the ignition coil boot for the following conditions: Holes Tears Carbon tracking Oil contamination or water intrusion Did you find a condition with the ignition coil boot?	-	Go to Step 12	Go to Step 4
4	Remove the fuel pump fuse from the electrical center. Install the J 26792 Spark Tester to the ignition coil boot and a good ground. Crank the engine while observing the J 26792 . Does the spark tester spark and is the spark consistent?	-	Go to Step 5	Go to Electronic Ignition (EI) System Diagnosis
5	Turn OFF the ignition. Remove the spark plug from the cylinder that indicated a misfire. Inspect the spark plug. Refer to Spark Plug Inspection . Does the spark plug appear to be OK?	-	Go to Step 9	Go to Step 6
6	Is the spark plug oil or coolant fouled?	-	Go to Symptoms - Engine Mechanical	Go to Step 7
7	Is the spark plug gas fouled?	-	Go to Step 10	Go to Step 8
8	Does the spark plug show any signs of being cracked, worn, or incorrectly gap?	-	Go to Step 11	Go to Step 9
9	Swap the suspected spark plug with another cylinder that is operating correctly. Start the engine. Operate the engine within the conditions that the misfire occurred. Monitor the Misfire Current Counters with a scan tool. Did the misfire move with the spark plug?	-	Go to Step 11	Go to Step 10
10	IMPORTANT: Make sure all the fuel injectors operate. High resistance in an fuel injector circuit causes the fuel injector to be inoperative without setting a fuel injector DTC. Return to this diagnostic after you complete the Fuel Injector Coil Test. Perform the fuel injector coil test. Refer to Fuel Injector Solenoid Coil Test .Did you find and correct the condition?	-	Go to Step 13	Go to Symptoms - Engine Mechanical
11	Replace the spark plug. Refer to Spark Plug Replacement . Did you complete the replacement?	-	Go to Step 13	-
12	Replace the ignition coil. Refer to the appropriate procedure: Ignition Coil Replacement - Bank 1 Ignition Coil Replacement - Bank 2 Did you complete the replacement?	-	Go to Step 13	-
13	Was the customer's concern that the malfunction indicator lamp (MIL) is flashing?	-	Go to DTC P0420 or P0430	Go to Step 14
14	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 15
15	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