The OBD code P0673 for GMC indicates a fault with the cylinder #3 glow plug circuit.
Symptoms include the engine light being on, lack of power, hard starting, and engine hesitation.
This is usually caused by a faulty cylinder #3 glow plug, open/shorted harness, poor electrical connection, or a faulty Glow Plug Control Module.
It is a moderate issue that can be fixed by inspecting and repairing the wiring harness and connectors related to the cylinder #3 glow plug circuit.
| Repair Importance Level | 10.0 (Out of 10) |
| Estimated Repair Time | Approximately 1.0 hour |
| Repair Difficulty Level | 10.0 (Out of 10) |
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Symptoms of the Gmc p0673 OBD Code
The vehicle may experience rough idling or difficulty starting with GMC fault code P0673.
- With OBD code P0673 on a GMC vehicle, symptoms may include: Engine Light ON.
- Lack/Loss of Power.
- The engine may be harder to start.
- Engine hesitation.
Causes of the Gmc p0673 OBD Code
Fault code P0673 on a GMC typically indicates an issue with the glow plug circuit for cylinder 3.
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- P0673 can be caused by a faulty cylinder #3 glow plug.
- A cylinder #3 glow plug harness that is open or shorted.
- A cylinder #3 glow plug circuit with poor electrical connection.
- A faulty Glow Plug Control Module (GPCM).
Fixing Gmc Error Code p0673 Step By Step
Address the faulty glow plug circuit on a GMC vehicle with fault code P0673.
- To fix GMC OBDII code P0673, first, review the ‘Possible Causes’ mentioned above and visually examine the corresponding wiring harness and connectors.
- Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
- Next, focus on cylinder 3 glow plug circuit specifically.
- Check the glow plug itself for proper operation and resistance.
- Test the glow plug control module for functionality.
- Replace any faulty glow plugs or the control module as necessary.
- Clear the fault codes and perform a test drive to verify the repair.
Cost Of Fixing Gmc p0673 Fault Code
The repair for GMC fault code P0673 may involve replacing a faulty glow plug control module.
The cost to diagnose and fix the GMC OBD code P0673 will depend on the estimated 1. 0hour repair time.
Labor rates usually range from $75 to $150 per hour, so the cost can be around $75 to $150, excluding parts.
The final cost may vary based on shop rates, complexity of the repair, and any additional parts needed.
Details of the Gmc p0673 OBD Code
Code P0673 in a GMC indicates a fault in the glow plug circuit for cylinder 3.
GMC OBD code P0673 means that a fault has been detected in glow plug #3 circuit.
This code is triggered by the ECM (Engine Control Module) when it detects a problem with the glow plug #3 circuit during the glow plug system operation.
The glow plug system is involved in heating the air in the combustion chamber to aid in cold starting.
When P0673 is set, it indicates an issue specifically with glow plug #3, which could be due to a faulty glow plug, wiring issue, or a problem with the glow plug control module.
Mechanic’s Tech Notes
Detailed information on diagnosing and repairing fault code P0673 in a GMC vehicle.
OBDII code P0673 for a GMC indicates a fault with the glow plug circuit in cylinder 3. To diagnose, use a voltmeter to check the glow plug circuit’s power and ground connections.
Inspect the wiring harness and connectors for any damage, corrosion, or loose connections.
Test the glow plug itself for proper operation.
A scan tool can help monitor the glow plug control module’s response over the network.
If all connections and components check out, consider reprogramming the control module.
FAQ
OBD code P0673 in a GMC indicates an issue with cylinder #3 glow plug circuit. Symptoms include engine light on, lack of power, and engine hesitation. Check related components for faults.
Common symptoms of OBD code P0673 in a GMC vehicle include Engine Light ON, lack of power, hard starting, engine hesitation. Possible causes: faulty cylinder #3 glow plug, harness issues. Fix: Inspect wiring, connectors for damage.
Diagnose and repair OBD code P0673 in your GMC by checking cylinder #3 glow plug, harness, and connections for faults. Inspect and repair as needed.
Wrap Up
If your GMC is displaying OBD code P0673, you may experience rough idling, misfires, or difficulty starting.
This code typically indicates a fault in cylinder 3 glow plug circuit, possibly caused by a faulty glow plug, wiring issues, or a defective glow plug control module.
To address GMC OBD code P0673, start by inspecting the glow plug in cylinder 3 for proper operation.
Check the wiring harness and connectors for any damage or corrosion.
Test the glow plug control module for functionality and replace any faulty components as needed.
