Diagnostic Aids

WARNING: This page is about a different variant/trim than selected.

Performing the fuel injector coil test may help isolate an intermittent condition. Refer to Fuel Injector Solenoid Coil Test .
If the condition is intermittent, refer to Intermittent Conditions

DTC P0261, P0264, P0267, P0270, P0273, P0276, P0279, or P0282

Step	Action	Yes	No
Schematic Reference: Engine Controls Schematics Connector End View Reference: Engine Controls Connector End Views or Engine Control Module Connector End Views
1	Did you perform the Diagnostic System Check - Vehicle?	Go to Step 2	Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2	Clear the DTCs with a scan tool. Crank the engine or start the engine. Is DTC P0261, P0264, P0267, P0270, P0273, P0276, P0279, or P0282 set?	Go to Step 3	Go to Step 5
3	Are DTCs P0261, P0267, P0273, and P0279 set at the same time?	Go to Step 11	Go to Step 6
4	Are DTCs P0264, P0270, P0276, and P0282 set at the same time?	Go to Step 12	Go to Step 6
5	Observe the Freeze Frame/Failure Records for this DTC. Turn OFF the ignition for 30 seconds. Crank the engine or start the engine. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions observed from the Freeze Frame/Failure Records. Did the DTC fail this ignition?	Go to Step 6	Go to Diagnostic Aids
6	Turn OFF the ignition. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement . Connect the J 44603 Injector Test Lamp between the control circuit and the ignition 1 voltage circuit of the fuel injector. See Special Tools . Start the engine. Does the test lamp flash?	Go to Step 9	Go to Step 7
7	Does the test lamp remain illuminated at all times?	Go to Step 8	Go to Step 10
8	Test the control circuit of the fuel injector for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 15	Go to Step 14
9	Test for an intermittent and for a poor connection at the fuel injector. Refer to Testing for Intermittent Conditions and Poor Connections andConnector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 15	Go to Step 13
10	Test for an intermittent and for a poor connection at the engine control module (ECM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 15	Go to Step 14
11	Repair the short to ground in the ignition 1 voltage circuit of the odd fuel injectors. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair?	Go to Step 15	-
12	Repair the short to ground in the ignition 1 voltage circuit of the even fuel injectors. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair?	Go to Step 15	-
13	Replace the affected fuel injector. Refer to Fuel Injector and Fuel Rail Replacement . Did you complete the replacement?	Go to Step 15	-
14	Replace the ECM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement?	Go to Step 15	-
15	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 16
16	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 in Vehicle DTC Information	System OK