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Re: I have an engine check light on. The error is p0049....
Take it to your local Autozone, advance, etc.. parts store and have them do a FREE fault check. They'll print out the faults for you and reset your light(s)
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check engine light comes on when the computer detects a problem with the engine drivability and sets a code for what may be causing the problem that set the light on. the traction control off light comes on when the abs system detects a problem of a wheel or sensor that has lost communication with the system either through the electronics or through a wheel spin. this system works and is monitored by the abs system module(computer).
I just repaired this problem this past weekend. It is the Emission Control Solenoid. It is located next to the fuel tank. The cost of the part is about $30.00 from the dealer. It has one electrical connection and one hose attached. The total repair, including jacking the truck up was about 20 minutes.
The check engine light will come on when you leave the gas cap off or don;t put it back on securely. If you have replaced it, just disconnect the battery for about 15 minutes and the light should go off. If it comes back on then there is a different problem that needs to be addressed.
If you allready checked the gas cap and its on right.
Try replacing the gas cap with a new one.
You should here air wen you open the gas cap after driving
This is part of the emision controls and if it dosn't seal it will cause the check engine light to come on .
PO455 is a large evaporative fuel leak. A bad fuel cap is ONE of the things that COULD be the problem. Fuel system cleaning only lightened your wallet. Reading your post is confusing. Did all this start AFTER the Valvoline Wallet Flushing? If so , they left something loose or disconnected. I would find a qualified repair shop to fix the problem, and if it has anything to do with what Valvoline did, make them pay the bill.
By "Replace the gas cap", do you mean put it back on, or buy another one? If you fuel these trucks with the engine running, or don't tighten the gas cap, the light will come on. It will also come on when the seal in your gas cap goes bad. I have had to replace the gas cap on my jeep and dodge already. It fixed the problem both times.
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