The P2404 OBD-II code indicates an issue with the Evaporative Emission System (EVAP) leak detection pump sense circuit. This code is triggered when the vehicle’s computer detects a malfunction in the pressure/vacuum monitoring system of the EVAP system, which plays a critical role in reducing harmful emissions.
What Does the P2404 Code Mean?
OBD-II Code P2404 is defined as a problem within the Evaporative Emission System Leak Detection Pump Sense Circuit. The EVAP system’s purpose is to capture and vent fuel vapors from the fuel tank to the intake manifold for combustion, thus preventing these vapors from escaping into the atmosphere.
What Causes the P2404 Code?
Several factors can trigger the P2404 code, including:
- Evap leak detection pump failure
- Leak in the EVAP system
- Powertrain Control Module (PCM) failure
- Restriction in the EVAP system
- Wiring issues
What Are the Symptoms of the P2404 Code?
While some vehicles may not exhibit noticeable symptoms, others may display certain indications, including:
- Illuminated check engine light
- Decreased fuel efficiency
- Failed emissions test
How Serious Is the P2404 Code?
The P2404 code is classified as a moderate severity issue. Although it may not pose an immediate threat to your vehicle’s safety or functionality, it is advisable to address it promptly to prevent further complications and ensure optimal vehicle performance.
How to Diagnose the P2404 Code
To properly diagnose the P2404 code, a qualified technician will typically perform the following steps:
- Use an OBD-II scanner to confirm the P2404 code and check for any additional codes.
- Inspect the EVAP system for any visible leaks or damage.
- Test the leak detection pump for proper operation.
- Examine the wiring and connections for any signs of wear or corrosion.
- Check the Powertrain Control Module (PCM) for any faults.
Common Repairs for the P2404 Code
Common repairs for the P2404 code may include:
- Replacing the evap leak detection pump
- Repairing or replacing damaged hoses or connections in the EVAP system
- Addressing any wiring issues or shorts
- Reprogramming or replacing the PCM if necessary
How Much Does It Cost to Fix the P2404 Code?
The cost to repair the P2404 code can vary significantly based on the extent of the damage and the labor rates in your area. Typically, repairs can range from $100 to $500, depending on whether parts need to be replaced or if a more extensive diagnostic procedure is required.
Can I Fix the P2404 Code Myself?
While some DIY enthusiasts may attempt to fix the P2404 code themselves, it is recommended to seek assistance from a qualified mechanic. Proper diagnosis requires specialized tools and knowledge of the EVAP system, and making incorrect repairs may lead to further issues.
