DTC P0201-P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, P0277, P2146, P2149, P2152, P2155, P216A, or P216D with LLT

Diagnostic Instructions

DTC Descriptors

DTC P0201: Injector 1 Control Circuit

DTC P0202: Injector 2 Control Circuit

DTC P0203: Injector 3 Control Circuit

DTC P0204: Injector 4 Control Circuit

DTC P0205: Injector 5 Control Circuit

DTC P0206: Injector 6 Control Circuit

DTC P0261: Injector 1 Control Circuit Low Voltage

DTC P0262: Injector 1 Control Circuit High Voltage

DTC P0264: Injector 2 Control Circuit Low Voltage

DTC P0265: Injector 2 Control Circuit High Voltage

DTC P0267: Injector 3 Control Circuit Low Voltage

DTC P0268: Injector 3 Control Circuit High Voltage

DTC P0270: Injector 4 Control Circuit Low Voltage

DTC P0271: Injector 4 Control Circuit High Voltage

DTC P0273: Injector 5 Control Circuit Low Voltage

DTC P0274: Injector 5 Control Circuit High Voltage

DTC P0276: Injector 6 Control Circuit Low Voltage

DTC P0277: Injector 6 Control Circuit High Voltage

DTC P2146: Injector Positive Voltage Control Circuit Group 1

DTC P2149: Injector Positive Voltage Control Circuit Group 2

DTC P2152: Injector Positive Voltage Control Circuit Group 3

DTC P2155: Injector Positive Voltage Control Circuit Group 4

DTC P216A: Injector Positive Voltage Control Circuit Group 5

DTC P216D: Injector Positive Voltage Control Circuit Group 6

Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Fuel Injector 1 High Voltage Control	P2146	P0201	P2146	--
Fuel Injector 1 Low Voltage Control	P0261	P0201	P0262	--
Fuel Injector 2 High Voltage Control	P2149, P216A	P0202	P2149, P216A	--
Fuel Injector 2 Low Voltage Control	P0264	P0202	P0265	--
Fuel Injector 3 High Voltage Control	P2152, P216D	P0203	P2152, P216D	--
Fuel Injector 3 Low Voltage Control	P0267	P0203	P0268	--
Fuel Injector 4 High Voltage Control	P2155	P0204	P2155	--
Fuel Injector 4 Low Voltage Control	P0270	P0204	P0271	--
Fuel Injector 5 High Voltage Control	P2149, P216A	P0205	P2149, P216A	--
Fuel Injector 5 Low Voltage Control	P0273	P0205	P0274	--
Fuel Injector 6 High Voltage Control	P2152, P216D	P0206	P2152, P216D	--
Fuel Injector 6 Low Voltage Control	P0276	P0206	P0277	--

Circuit/System Description

The engine control module (ECM) supplies voltage to each fuel injector on the injector high voltage control circuits. The ECM energizes each fuel injector by grounding the high voltage control circuit of that fuel injector. The ECM monitors the status of the injector high voltage control circuits and the fuel injector low voltage control circuits. When a fuel injector circuit condition is detected by the ECM, the affected fuel injector(s) will be disabled.

Conditions for Running the DTC

Conditions for Setting the DTC

P0201, P0202, P0203, P0204, P0205, or P0206

The ECM detects the injector high voltage control circuit or the injector low voltage control circuit is open for greater than 4 seconds or for a cumulative of 30 seconds.

P0261, P0264, P0267, P0270, P0273, or P0276

The ECM detects the injector low voltage control circuit is shorted to ground for greater than 4 seconds or for a cumulative of 30 seconds.

P0262, P0265, P0268, P0271, P0274, or P0277

The ECM detects the injector low voltage control circuit is shorted to voltage for greater than 4 seconds or for a cumulative of 30 seconds.

P2146, P2149, P2152, P2155, P216A, or P216D

The ECM detects the injector high voltage control circuit is shorted to ground or shorted to a voltage for greater than 4 seconds or for a cumulative of 30 seconds.

Action Taken When the DTC Sets

DTCs P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, P0277, P2146, P2149, P2152, P2155, P216A, and P216D are Type B DTCs.

Conditions for Clearing the DTC

DTCs P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, P0277, P2146, P2149, P2152, P2155, P216A, and P216D are Type B DTCs.

Diagnostic Aids

Reference Information

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Fuel System Description

Electrical Information Reference

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Observe the Misfire Current Counters with a scan tool. The Misfire Current Counters should not be incrementing
2. Engine operating, observe the appropriate scan tool Fuel Injector Circuit Test Status parameters. Verify the Fuel Injector Circuit Test Status parameters display OK or Not Run.
3. Engine operating, observe the DTC information with a scan tool. DTC P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, P0277, P2146, P2149, P2152, P2155, P216A, or P216D should not set.
4. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

1. Ignition ON, clear the DTC information with a scan tool.
2. Ignition OFF, disconnect the appropriate multi-way harness connector X160 or X161, at the rear of the intake manifold.

Note: Testing for steps 3 through 12 is performed on the ECM side of the multi-way harness connector.

3. Connect a test lamp between ground and the high voltage control circuit terminal of the appropriate injector listed below.

•	Fuel Injector 1 terminal 8 X161

•	Fuel Injector 2 terminal 2 X160

•	Fuel Injector 3 terminal 9 X161

•	Fuel Injector 4 terminal 4 X160

•	Fuel Injector 5 terminal 10 X161

•	Fuel Injector 6 terminal 6 X160

4. Crank or start the engine while observing the test lamp, the test lamp should flash several times and then stop when the DTC sets.

Note: Four of the injector high voltage control circuits are paired in the controller with a dual driver, refer to Diagnostic Aids.

⇒	If the test lamp is always ON, test the circuit for a short to voltage. If the circuit tests normal, replace the ECM.

⇒	If the test lamp is always OFF, test the circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ECM.

5. Clear the DTC information with a scan tool, then cycle the ignition OFF.
6. Connect a test lamp between B+ and the low voltage control circuit terminal of the appropriate injector listed below.

•	Fuel Injector 1 terminal 2 X161

•	Fuel Injector 2 terminal 1 X160

•	Fuel Injector 3 terminal 3 X161

•	Fuel Injector 4 terminal 3 X160

•	Fuel Injector 5 terminal 4 X161

•	Fuel Injector 6 terminal 5 X160

7. Ignition ON, the test lamp should not illuminate.

⇒	If the test lamp is ON, test the low control circuit for a short to ground. If the circuit tests normal, replace the ECM.

8. Connect a test lamp between ground and the low voltage control circuit terminal of the appropriate injector listed below.

•	Fuel Injector 1 terminal 2 X161

•	Fuel Injector 2 terminal 1 X160

•	Fuel Injector 3 terminal 3 X161

•	Fuel Injector 4 terminal 3 X160

•	Fuel Injector 5 terminal 4 X161

•	Fuel Injector 6 terminal 5 X160

9. Ignition ON, the test lamp should not illuminate.

⇒	If the test lamp is ON, test the low control circuit for a short to voltage. If the circuit tests normal, replace the ECM.

10. Clear the DTC information with a scan tool, then cycle the ignition OFF.
11. Ignition OFF, connect a test lamp between the high voltage control circuit terminal and the low voltage control circuit terminal of the appropriate injector listed below.

•	Fuel Injector 1 terminal 8 and terminal 2 X161

•	Fuel Injector 2 terminal 2 and terminal 1 X160

•	Fuel Injector 3 terminal 9 and terminal 3 X161

•	Fuel Injector 4 terminal 4 and terminal 3 X160

•	Fuel Injector 5 terminal 10 and terminal 4 X161

•	Fuel Injector 6 terminal 6 and terminal 5 X160

12. Crank or start the engine while observing the test lamp, the test lamp should flash several times and then stop when the DTC sets.

⇒	If the test lamp does not flash, test the low control circuit for an open/high resistance. If the circuit tests normal, replace the ECM.

Note: Testing for the following steps is performed on the fuel injector side of the multi-way harness connector. It may be necessary to remove the intake manifold to isolate the condition.

13. Ignition OFF, measure the resistance between the appropriate high voltage control circuit terminal listed below and ground. The DMM should display OL Ω.

•	Fuel Injector 1 terminal 8 X161

•	Fuel Injector 2 terminal 2 X160

•	Fuel Injector 3 terminal 9 X161

•	Fuel Injector 4 terminal 4 X160

•	Fuel Injector 5 terminal 10 X161

•	Fuel Injector 6 terminal 6 X160

⇒	If less than the specified range, test the high voltage, or low control circuit, for a short to ground. If the circuits/connections test normal, test or replace the appropriate fuel injector(s).

14. Test for 1.5-2.5 Ω between the appropriate high voltage control and low voltage control circuit listed below.

•	Fuel Injector 1 terminal 8 and terminal 2 X161

•	Fuel Injector 2 terminal 2 and terminal 1 X160

•	Fuel Injector 3 terminal 9 and terminal 3 X161

•	Fuel Injector 4 terminal 4 and terminal 3 X160

•	Fuel Injector 5 terminal 10 and terminal 4 X161

•	Fuel Injector 6 terminal 6 and terminal 5 X160

⇒	If less than the specified range, test for a short between the high voltage and low voltage control circuit. If the circuits/connections test normal, test or replace the appropriate fuel injector(s).

⇒	If greater than the specified range, test the high voltage and low voltage control circuit, for an open/high resistance. If the circuits/connections test normal, test or replace the appropriate fuel injector(s).

Component Testing

1. Remove the intake manifold and disconnect the appropriate fuel injector.
2. Test for 1.5 Ω plus/minus 0.15 Ω at 20°C (68°F) between the high voltage control circuit terminal 2 and the low voltage control circuit terminal 1 at the fuel injector.

⇒	If not within the specified range, replace the fuel injector.

3. Measure the resistance between each terminal at the fuel injector and the fuel injector housing/case. The DMM should display OL Ω.

⇒	If less than the specified value, replace the fuel injector.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.