Is on. First I check the gas cap, which to my surprise was loose. I know you have to crank it down 3 clicks. A couple days later, I check it again and it was loose again. So I went to auto zone and bought a new gas cap. while I was there one of the employees hooked up that little machine to somewhere under the dash. she came back with 2 codes P1457 and P1298. I have to drive this car 735 miles in a couple of days. Not sure I should without getting what ever the problem is fixed. Can you help me out? Please
My check engine light was on for a long time,after new sparkplugs and several trips to tuffy auto and almost $500 spent I gave up and brought it to a honda dealer-I HAD BAD FUEL INJECTORS - $700 spent everything ok now.no more annoying check engine lights!!!!
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Getting a smoke test is the right direction to go in. The computer vents the gas tank to the vapor canister while the engine is running. It also pressure tests the system for leaks. Some where between the gas tank and the vapor canister there may be a leaking hose or valve. Or it could be the gasket on top of the tank where the pump assembly went in. The gas cap could have been a source for the leak, the other things are not involved.
P0340 - Camshaft position sensor circuit malfunction.
P0457 - Evaporative emission control system leak detected (fuel filler cap loose/off)
There is a bulletin #0398 posted on 05/12/2003 for P0457 - Malfunction indicator lamp (mil) illumination with diagnostic trouble codes p0442, p0455, p0456, p0457, p1442 or check fuel cap lamp illuminated with diagnostic trouble code p0457.
I'd suggest checking with your local dealer, as it may be a fix that is covered by the dealer.
Have you checked the gas cap to see if it is on tight? If you purchased gas in the last couple days it might be the solution. Tighten the cap and drive a couple days to see if the light goes off. If the cap is loose, you might need a new cap.
I think you may be overfilling your gas tank. If you do this, petrol can get down the vapour lines to the charcoal cannister under the hood causing it to become saturated. This in turn would set off the cannister purge sensor and cause the check engine light ot come on. Try filling your tank only to the first click-off.
The P0141 code points to the O2 sensor heater circuit. It could be that there is a short in the wiring to the O2 sensor or it could be that the O2 sensor heating element itself is bad. The code is for O2 sensor Bank 1 Sensor 2. Bank 1 means its the O2 sensor connected to the exhaust pipe that runs to cylinder #1. Sensor 2 means that it is likely the O2 sensor after the catalytic converter on the same exhaust pipe.