DTC P0351 or P0352. Pontiac G3 2007

For 1990-2009 cars only

Makes 🢒 Pontiac 🢒 2007 🢒 G3 🢒 DTC 🢒 DTC P0351 or P0352

Diagnostic Instructions

•	Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

•	Review Strategy Based Diagnosis for an overview of the diagnostic approach.

•	Diagnostic Procedure Instructions provide an overview of each diagnostic category.

DTC Descriptors

DTC P0351: Ignition Coil 1 and 4 Control Circuit

DTC P0352: Ignition Coil 2 and 3 Control Circuit

Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Ignition 1 Voltage	1	2	--	--
Ignition Coil 1 and 4 Control Circuit	1	P0300, P0351	P0300, P0351	--
Ignition Coil 2 and 3 Control Circuit	1	P0300, P0352	P0300, P0352	--
The Engine Cranks but Does Not Run and opens the fuse that supplies voltage to the ignition coils. The Engine Cranks but Does Not Run.

Ignition 1 voltage is supplied to the ignition coil. The engine control module (ECM) provides a ground for the ignition coil (IC) control circuits. When the ECM removes the ground path of the ignition primary coil, the magnetic field produced by the coil collapses. The collapsing magnetic field produces a voltage in the secondary coil which ignites the spark plugs. The sequencing and timing are controlled by the ECM. The ignition coils consist of the following circuits:

•	The ignition 1 voltage

•	The IC 1 and 4 control

•	The IC 2 and 3 control

Conditions for Running the DTC

•	The engine is operating.

•	The DTCs run continuously once the above condition is met.

Conditions for Setting the DTC

The ECM detects an open or short to ground or voltage on the IC circuit.

Action Taken When the DTC Sets

•	DTC P0351 and P0352 are Type B DTCs.

•	The ECM commands open loop fuel control.

Schematic Reference

Engine Controls Schematics

Connector End View Reference

•	Engine Controls Connector End Views

•	Engine Control Module Connector End Views

Electrical Information Reference

•	Circuit Testing

•	Connector Repairs

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

•	Scan Tool Data List

•	Scan Tool Data Definitions

•	Scan Tool Output Controls

Circuit/System Verification

Engine idling, observe the DTC information with a scan tool. DTC P0351 and P0352 should not set.
If the vehicle passes the Circuit/System Verification test, then operate the vehicle within the conditions for running the DTC. You may also operate the vehicle within the conditions that are captured in the Freeze Frame/Failure Records List.

Circuit/System Testing

Ignition OFF, disconnect the harness connector of the ignition coil.
Ignition ON, verify that a test lamp illuminates between the ignition 1 voltage circuit and ground.

⇒	If the test lamp does not illuminate, test the ignition 1 voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition 1 voltage circuit fuse is open, test all components connected to the ignition 1 voltage circuit and replace as necessary.

Important: Set the DMM to the AC Hertz scale for this test.

Connect a DMM between the appropriate ignition control circuit and ground.
While cranking the engine, test for greater than 2 hertz between the appropriate ignition control circuit and ground.

⇒	If less than 2 hertz, test the ignition control circuit for a short to voltage, short to ground or an open/high resistance. If the circuit/connection test normal, replace the ECM.

If all circuits/connections test normal, replace the ignition coil.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

•	Ignition Coil Replacement

•	Control Module References for ECM replacement, setup, and programming