The OBD code P3450 for GMC indicates an issue with the Cylinder Deactivation System on the engine.
Symptoms include the Engine Light being ON.
This code is commonly caused by low oil pressure, restricted oil passage, faulty Valve Lifter Oil Manifold Assembly, or ECM issues.
It is crucial to address this promptly to prevent engine damage.
A possible fix involves inspecting wiring harnesses, connectors, and related components for any damage or poor connections.
| Repair Importance Level | 10.0 (Out of 10) |
| Estimated Repair Time | Approximately 1.0 hour |
| Repair Difficulty Level | 10.0 (Out of 10) |
Symptoms of the Gmc p3450 OBD Code
The vehicle may experience rough idling or reduced engine performance with GMC fault code P3450.
- Symptoms: Engine Light ON.
- Reduced engine performance.
- Possible rough idle.
- Possible engine noise.
Causes of the Gmc p3450 OBD Code
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Possible reasons for GMC P3450 include issues with the cylinder deactivation solenoid, wiring, or PCM.
- P3450 can be caused by low oil pressure.
- Restricted oil passage.
- A faulty Valve Lifter Oil Manifold Assembly.
- An open or shorted Valve Lifter Oil Manifold Assembly harness.
- A poor electrical connection in the Valve Lifter Oil Manifold Assembly circuit.
- Or a faulty Engine Control Module (ECM).
Fixing Gmc Error Code p3450 Step By Step
Address the issue by replacing the faulty exhaust camshaft position sensor in a GMC with code P3450.
- To fix GMC OBDII code P3450, first, review the possible causes related to the code.
- Visually inspect the wiring harness and connectors associated with the air injection system.
- Check for any damaged components and ensure the connector pins are not broken, bent, pushed out, or corroded.
- If no issues are found during the visual inspection, proceed to test the air injection pump sensor for proper operation.
- Replace the air injection pump sensor if it is faulty.
- Clear the fault code from the vehicle’s computer using a scan tool.
- Finally, test drive the vehicle to verify that the P3450 code does not return, indicating a successful repair.
Cost Of Fixing Gmc p3450 Fault Code
The repair for GMC fault code P3450 typically involves replacing the cylinder deactivation solenoid.
The cost to diagnose and fix the GMC OBD code P3450 depends on the estimated 1. 0hour repair time.
Labor rates usually range from $75 to $150 per hour, so the general cost could be between $75 and $150. The final cost may vary based on shop rates and the complexity of the repair.
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Details of the Gmc p3450 OBD Code
GMC fault code P3450 relates to cylinder deactivation system performance on V8 engines.
GMC OBD code P3450 means Cylinder Deactivation System Bank 1. This code is triggered when the ECM detects that the actual state of the cylinder deactivation system does not match the commanded state.
The cylinder deactivation system is involved in this code, which is responsible for deactivating specific cylinders to improve fuel efficiency under light load conditions.
Mechanic’s Tech Notes
This section provides detailed information on diagnosing and repairing GMC fault code P3450.
OBDII code P3450 for GMC indicates an issue with the Cylinder Deactivation System on V8 engines.
To diagnose, use a scan tool to monitor cylinder deactivation operation.
Check for any misfires or rough running when deactivation occurs.
Visually inspect wiring and connectors for any damage or corrosion.
Use a voltmeter to test power and ground circuits to the deactivation solenoids.
If no visible issues are found, consider reprogramming the engine control module (ECM) to address the concern.
FAQ
Common symptoms of GMC OBD code P3450 include Engine Light ON, caused by issues like low oil pressure, faulty Valve Lifter Oil Manifold Assembly, or ECM problems.
Typical cause of OBD code P3450 in a GMC vehicle is a faulty Valve Lifter Oil Manifold Assembly or issues with related wiring/connectors.
Diagnose P3450 in GMC: Check oil pressure, inspect valve lifter oil manifold assembly, and review ECM. Examine wiring for damage or poor connections.
Wrap Up
If your GMC is displaying OBD code P3450 and you notice a decrease in engine power, it could be caused by a faulty Active Fuel Management (AFM) system.
This system deactivates cylinders to improve fuel efficiency.
Issues with AFM lifters, solenoids, or oil pressure can trigger P3450. To address GMC OBD code P3450, check the AFM system components like lifters, solenoids, and oil pressure sensors.
Inspect wiring harnesses for any damage or loose connections.
Consider replacing faulty components or addressing oil pressure issues to resolve the
