OBD-II Code P2406 is defined as Evaporative Emission System Leak Detection Pump Sense Circuit. This code indicates a problem with the sensor that monitors the pressure and vacuum in the Evaporative Emission System (EVAP).
What Does the P2406 Code Mean?
The P2406 code signifies that the vehicle’s onboard diagnostic system has detected an implausible signal from the leak detection pump sensor within the EVAP system. The EVAP system is responsible for venting fuel vapors from the fuel tank to the intake manifold, where they are burned during normal combustion.
What Causes the P2406 Code?
Several issues can trigger the P2406 code, including:
- Evap leak detection pump failure
- Leak in the EVAP system
- Powertrain Control Module (PCM) failure
- Restriction in the EVAP system
- Wiring issues related to the leak detection pump or its sensor
What Are the Symptoms of the P2406 Code?
Common symptoms that may indicate a P2406 code include:
- Check Engine Light illuminated
- Increased emissions
- Poor fuel economy
How Serious Is the P2406 Code?
The P2406 code has a moderate severity level. While it may not pose an immediate threat to the vehicle’s safety or functionality, it is advisable to have it diagnosed and repaired within a reasonable timeframe to prevent more serious issues down the road.
How to Diagnose the P2406 Code
Diagnosing the P2406 code typically involves the following steps:
- Use an OBD-II scanner to confirm the P2406 code is present.
- Inspect the EVAP system for any visible leaks or damage.
- Check the wiring and connections related to the leak detection pump sensor.
- Test the leak detection pump and sensor for proper operation.
- Examine the Powertrain Control Module for any faults or issues.
Common Repairs for the P2406 Code
Repairing the P2406 code may involve:
- Replacing a faulty leak detection pump
- Repairing or replacing damaged wiring or connectors
- Fixing leaks in the EVAP system
- Replacing the Powertrain Control Module if necessary
How Much Does It Cost to Fix the P2406 Code?
The cost to fix the P2406 code can vary significantly based on the specific issue and labor costs in your area. Generally, repairs can range from $100 to $500, depending on whether you need to replace parts or perform more extensive repairs.
Can I Fix the P2406 Code Myself?
While some DIY enthusiasts may be able to address minor issues like replacing a sensor or fixing simple leaks, diagnosing and repairing the P2406 code can be complex. It is recommended to consult with a certified mechanic, especially if you are unfamiliar with EVAP systems.
