Q: P0455 2005 Chevy Monte Carlo

asked by on

So my car keeps throwing the p0455 code and my car is over heating, burning alot of fuel and accelerating hesitantly. Ive replaced the maf sensor, catalytic converter, o2 sensor, pvc valve, egr, water pump, thermostat and the fans work great. Ive also replaced the head gaskets about 8 months ago. I bought the car about 9 months ago and its been acting up for the last 2 months. Im tired of throwing money away please help!?!?!

My car has 187000 miles.
My car has an automatic transmission.

The code P0455 is for a gross leak in the evaporative gas tank system and will not have any thing to do with overheating, but may have something to do with other issues. The overheating would should be the first issue addressed. Have a mechanic conduct a diagnostic on the overheating problem and Check Engine Light so that the faults can be pinpointed before throwing any more money and parts at the car.

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. P0455 2005 Chevy Monte Carlo

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: Overheating - 1995 Honda Accord

Hey there. This can be caused by a number of things such as low coolant levels, a faulty thermostat, or a failing coolant fan switch. As you may know the [coolant fan switch] https://www.yourmechanic.com/services/cooling-fan-relay-replacement helps to maintain the proper coolant...

Q: I'm getting a check engine light with codes p0455 and p0456. I tried a new gas cap from the dealer but the light comes back in a few days.

Hi there - the 2 codes you mention are indicative of a leak in the evaporative emissions system. As you have been advised, this is sometimes caused by a loose gas cap, or one that no longer seals properly. It...

Q: Car loses power and stalls - 2014 Cadillac ATS

Hi! You may have to leave your vehicle with the dealership in order for them to be able to duplicate the concern. While it is not necessary for there to be diagnostic trouble codes present in the vehicle's computer in...

Related articles

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...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...