Q: EVAP system Pending catalytic code with CEL

asked by on

I recently bought an 04 mazda 6 from a private seller the car starts and runs great a little sluggish upon acceleration from a stop but otherwise a very well running car. About 50 miles down the road CEL illuminates.I take it to be looked at and the EVAP system isn't ready and has a pending catalytic code.the mechanic was dead set it was just leaks.so we smoked it and repaired the leaks.I took it to be inspected because I'm only on a 10 day and it failed emissions for evap and the pending cat code the mechanic said it just needed to be driven more so I did so and low and behold 30 miles in that lovely CEL is back on.This is becoming an issue and I'm running out of time any idea as to what I should try next.

My car has 126000 miles.
My car has an automatic transmission.

It is possible that you could be experiencing a catalytic converter failure. This can be due to the fact that after driving 30-50 miles the exhaust system heats up quite a bit. Once the exhaust is heated up the catalytic converter begins to show signs of failure. Often times when the precious metals inside the catalytic converter fail, they melt together as if they have been welded. This makes the orphice through the catalytic converter much smaller and increases the backpressure of the exhaust. This will prevent the engine from breathing properly. I would recommend having your catalytic converter inspected and replaced as necessary to resolve this issue.

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. EVAP system Pending catalytic code with CEL

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: Clutch slipping on manual transmission

Unfortunately, the Mazda clutch is a hydraulic system that has no adjustments. If the clutch is slipping the clutch disc is most likely either worn or the pressure plate is faulty. The clutch system will need to be inspected and...

Q: Stalling when stepping on the accelerator

Hello. Stalling can be caused by many things. If you believe it may be the fuel system then a few components to look at the vehicle's fuel pump, fuel pressure regulator, and injectors. An issue with any of these can...

Q: Car starts, then stalls in one second.

Hi there. This can be a computer issue, but from the codes and the issue it sounds more like a voltage problem. If there is low voltage from a bad battery or a bad connection then the vehicle will act...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...