Q: Had a P0446 code, now I have a P2405 code

asked by on

I had two codes, po126 and po446 originally. I replaced the thermostat and now only have a p2405 code. I originally thought it was the purge solenoid but now it is saying the leak detection pump. Could this all still be related to a bad purge valve? That would make the leak detection pump run at lower current due to a leak and less pressure. Do you think I should still evaluate the purge valve. I have a vacuum pump coming soon.

My car has 198000 miles.
My car has an automatic transmission.

Hi, thanks for writing in. The P2405 code is generated by the leak detection system which creates an artificial vacuum in your fuel supply system for a short period of time upon each engine startup sequence. If it is unable to hold a vacuum, such as because of a loose gas cap, this code is set. You don’t specify which model of Mazda you own, but, there is a Mazda Technical Service Bulletin (01-043/09) which addresses the failure of the leak detection pump. I recommend checking with your Mazda dealers service manager regarding this TSB for your vehicle. If you would like help, consider having an expert automotive technician from YourMechanic come to your home or office to inspect your service lights for you, and make or suggest any repairs needed.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Had a P0446 code, now I have a P2405 code

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car overheating from lack of coolant.

If your car doesn't have enough coolant it will overheat. When it cools back down, top it off with water and have a certified mechanic perform a coolant pressure test to see where the leak is coming from. Common failures...

Q: Getting code P0446

The code P0446 is most likely due to an inoperative evaporative vent solenoid that will need replacement. The rear axle leak will need to be inspected to see where the leak is for a repair needed. If the rear cover...

Q: Q: Engine light is on

Hello. Diagnostic Trouble Codes (DTC's) do not necessarily identify faulty parts. For example, the Code you are inquiring about, namely, P0126 could set the Check Engine Light (CEL) simply because the coolant level in your car is too low. If...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.