At Fixya.com, our trusted experts are meticulously vetted and possess extensive experience in their respective fields. Backed by a community of knowledgeable professionals, our platform ensures that the solutions provided are thoroughly researched and validated.
Reset computer I had a 0449 code show up and replaced the gas cap and P0449 Evaporative Emission Control System Vent Valve and need to reset the computer to see if it is fixed. How do I reset the computer?
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
code p 0449 refers to evaporative emission (EVAP)system, vent valve ---circuit malfunction===causes --wiring ---EVAP cannister purge valve ---ECM
check the wiring for breaks , bad connections
replace the purge valve
the vent valve is part of the purge system of the EVAP system( fuel system)
code 0449 evaporative emission control system vent valve solenoid circuit malfunction check your fuses as well as connections and power going to the solenoid see manual for location of valve
Your best bet take it to a qualified repair shop . It takes special tool's to diagnose evaporative emission system's .
DTC P0411 : Secondary Air Injection (AIR) System Incorrect Air Flow Detected
DTC P0449: Evaporative Emission (EVAP) Vent Solenoid Control Circuit
DTC P0455: Evaporative Emission (EVAP) System Large Leak
P0449 Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction, meaning There is air escaping from the gas tank. Often a problem with the gas cap, try tightening the cap, reset the code and see if it comes back on. Essentially it is testing for cracks in the tank. so do that ,,, remove the cap and put it back tight,, if that code comes up again, just replace the cap, and they can test your old one at the parts store. the other code could be showing up because the computer is sensing a fuel problem, does the fuel gauge fluctuate ?
The codes you list are generic and unfortunately the descriptions provided are too. Do a bit of research into the applicalbe parts and you'll likely find a trend of malfunctions and repairs for your particular model year. After that it's time to either get greasy or see the mechanic, doesn't sound like it will be too bad, though.
http://www.obd-codes.com/trouble_codes/
P0445 Evaporative Emission Control System Purge Control Valve Circuit Shorted
P0449 Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction
P0446 Evaporative Emission System Vent Control Circuit.
The following are descriptions of all Evaporative possible codes:
P0441 Evaporative Emission System Incorrect Purge Flow P0442 Evaporative Emission System Leak Detected (small leak) P0443 Evaporative Emission System Purge Control Valve Circuit P0444 Evaporative Emission System Purge Control Valve Circuit Open P0445 Evaporative Emission System Purge Control Valve Circuit Shorted P0446 Evaporative Emission System Vent Control Circuit P0447 Evaporative Emission System Vent Control Circuit Open P0448 Evaporative Emission System Vent Control Circuit Shorted P0449 Evaporative Emission System Vent Valve/Solenoid Circuit P0450 Evaporative Emission System Pressure Sensor/Switch P0451 Evaporative Emission System Pressure Sensor/Switch Range/Performance P0452 Evaporative Emission System Pressure Sensor/Switch Low P0453 Evaporative Emission System Pressure Sensor/Switch High P0454 Evaporative Emission System Pressure Sensor/Switch Intermittent P0455 Evaporative Emission System Leak Detected (large leak) P0456 Evaporative Emission System Leak Detected (very small leak) P0457 Evaporative Emission System Leak Detected (fuel cap loose/off) P0458 Evaporative Emission System Purge Control Valve Circuit Low P0459 Evaporative Emission System Purge Control Valve Circuit High
---
At least the cap isn't loose for the gas tank.
I would clear the code with an OBD-II Scanner 'erase code' button, and see how long it takes for it to come back.
p0443 is evaporative emission control system, purge control curcuit malfunction, p0449 is emission control system, vent control curcuit malfunction. p0449 is often a filler cap problem on fuel tank. try tightening cap
P0442=Evaporative Emission System Leak Detected (small leak) P0449=Evaporative Emission System Vent Valve/Solenoid Circuit The first reason this would show up on a car as new is yours would be someone is not turning the gas cap at least three clicks past tight.The computer runs random vacume checks on the breather line to the fuel tank,if the cap is not tight it can't create vacume.and will fail the test.The second would be a cap replacement,The third would be a purge valve or line leaking.
×