The OBD code P2431 for GMC indicates a problem with the AIR Pressure Sensor circuit.
Symptoms include the Engine Light being ON.
This code is usually caused by a faulty AIR Pressure Sensor, open/shorted sensor harness, or poor electrical connection.
It’s important to address this issue promptly to prevent potential damage to the emissions system.
A possible fix involves inspecting the sensor, harness, and connectors for any issues.
| 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 p2431 OBD Code
The vehicle may exhibit poor engine performance and increased emissions with fault code P2431 on a GMC.
- Symptoms: Engine Light ON.
- Rough idle.
- Loss of power.
- Increased fuel consumption.
Causes of the Gmc p2431 OBD Code
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Possible reasons for GMC fault code P2431 include a faulty air injection pump pressure sensor circuit.
- P2431 can be caused by a faulty AIR Pressure Sensor.
- An open or shorted AIR Pressure Sensor harness.
- Poor electrical connection in the AIR Pressure Sensor circuit.
Fixing Gmc Error Code p2431 Step By Step
Address the secondary air injection system issue related to GMC fault code P2431.
- To fix GMC OBDII code P2431, start by reviewing the possible causes mentioned above.
- Visually examine the wiring harness and connectors related to the secondary air injection system.
- Check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
- If any issues are found, repair or replace the damaged wiring or connectors as necessary.
- Clear the fault code from the vehicle’s computer using a scan tool.
- Test the secondary air injection system to ensure proper operation.
- If the issue persists, consider replacing the secondary air injection pump or the associated components.
Cost Of Fixing Gmc p2431 Fault Code
The repair for GMC fault code P2431 involves diagnosing and fixing the secondary air injection system.
The cost to diagnose and fix a GMC OBD code P2431 typically ranges from $75 to $150, with an estimated repair time of 1. 0 hour.
The total cost depends on labor rates, shop fees, and the complexity of the repair needed.
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Details of the Gmc p2431 OBD Code
GMC fault code P2431 relates to the secondary air injection system pressure sensor circuit low.
GMC OBD code P2431 means that the secondary air injection system air flow/pressure sensor circuit low voltage has been detected.
This code is triggered by the Engine Control Module (ECM) when it detects a low voltage signal from the secondary air injection system air flow/pressure sensor.
The secondary air injection system is responsible for reducing emissions by injecting fresh air into the exhaust system to help with combustion of any remaining fuel.
When the ECM detects a low voltage signal from the sensor, it triggers the P2431 fault code.
Mechanic’s Tech Notes
This section provides detailed information on diagnosing and fixing GMC fault code P2431.
To diagnose and fix OBDII code P2431 in a GMC vehicle, start by visually inspecting the wiring harness and connectors related to the secondary air injection system.
Look for any damage or corrosion.
Use a voltmeter to check the power and ground connections to the secondary air injection pump.
A scan tool can help verify communication between the engine control module and the secondary air injection pump.
If necessary, reflash the engine control module.
This process can help address issues related to the secondary air injection system, potentially resolving the P2431 fault code.
FAQ
Common symptoms for OBD code P2431 in a GMC vehicle include Engine Light ON, caused by a faulty AIR Pressure Sensor or related wiring issues.
The typical cause of OBD code P2431 in a GMC vehicle is a faulty AIR Pressure Sensor, open/shorted harness, or poor electrical connection.
Diagnose and repair OBD code P2431 in your GMC by checking the AIR Pressure Sensor and its wiring for faults. Inspect connectors for damage or corrosion.
Wrap Up
If your GMC is displaying OBD code P2431 and you notice poor engine performance or rough idling, it may be caused by a faulty air injection system pressure sensor circuit.
This code typically indicates an issue with the air pump relay control circuit, leading to improper air injection into the exhaust system.
To address GMC OBD code P2431, start by inspecting the wiring harness and connectors related to the air injection system pressure sensor.
Check for any damaged wires, loose connections, or corrosion that could be affecting the sensor’s operation.
Additionally, test the air pump relay and related components for proper
