2006 Saturn Relay, 59000+ milage, got "check engine" light. Took it to Valvoline quick service and got fuel system cleaning and oil change. Check engine light started flashing then went steady again. Mechs reset computer by disconnecting battery. that day after leaving got a "check gas cap" message. stopped car and removed and replaced gas cap. Got message again. Removed and replaced again. Next morning got check gas cap again and check engine like came back on. Changed gas cap to factory cap (had a locking cap on that I had recently put on). Gas cap message went away, check engine light did not. Took it back to valvoline and they couldn't read diagnostic error. Took to autozone who read error as "P0455". Please let me know what I should do next? Do I wait to see if changing the gas cap worked? If so, how long? If that wasn't it, what should I be asking a mechanic to look for?
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Re: 2006 Saturn Relay Check Engine Light
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.
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Many things can contribute to low fuel economy, tire pressure, driving style, milage, and state of the servicing.
What sort of milage does the car have?
Has it had a tune up recently?
Air filter condition?
Fuel filter condition?
Transmission service if milage dictates?
Bad fuel, dirty fuel filter, dirty air filter, dirty injectors. I'm assuming there's no check engine light on. You should get upwards of 20mpg easy. try replacing the airfilter and fuel filter. I would get a K&N airfilter, i've had great luck with them. you should notice amore power and better fuel efficiency. Also, use an injector cleaning additive, like Lucas, and use synthetic engine oil. it cost more, but you'll change it less often and it's worth it. I'm a fan of valvoline. oh, and make sure your tires are inflated properly, that can make a noticeable difference
WELL NO OIL LEAKS.WARRANTY MIGHT COVER IT BUT YOU NEED TO SHOW ALL OIL CHANGE RECEIPTS.ALSO YOU HAVE TO USE GM MOTOR OIL LIKE 5W - 30 VALVOLINE USE GM OIL FILTERS.THEY WILL CHECK TO MAKE SURE YOU BEEN KEEPING UP WITH SERVICE MAINTENANCE AND SERVICE SCHEDULES.CHECK YOUR OIL LEVEL ON DIP STICK SHOULD BE AT FULL MARK LINE. THE CHEVY COBALT LS LT LTZ 2.2 ENGINE HOLDS 5.0 QUARTS OF OIL WITH NEW FILTER AND CHEVY COBALT SS SC HOLDS 6.0 QUARTS WITH NEW FILTER.IF OIL LEVEL LOOK OKAY.CHECK ON INTERNET FOR ANY RECALLS OR ANY TROUBLE WITH EARLY OIL PUMP FAILURE.
BMW uses Casteroil 5W-30 Full Synthetic Oil in all there engines except the M-series. After changing the oil the service light will nedd to be reset by the dealer, this is the only way it can be reset, it is part of the new Condition Based Service (CBS) system. Hope this helps, let me know.
Perform fuel injector check, check the Air filter, clean MAF sensor with the MAF sensor cleaner.Dirt sometimes accumulate on the sensor and that could cause for poor mileage.Before changing your engine oil
clean fuel injectors and sludge from the engine using 3 oz pure acetone and 2 oz xylene on 10 gallons of the fuel. Drive vehicle and then change your oil. You will notice a lot of sludge coming out of the pan. After draining oil, remove pan and gasket and clean with solvents and dry with the compressed air. DO NOT clean with the rag because that can contaminate your engine and oil.
need to have the codes pulled from the engine computer . it be causing problems with fuel milage or other things.there is a problem even if it is a small issue it should be checked out. now days you need your car running perfect to get as much fuel economy as you can.
the oil depends on how many miles are on it and where you live. In a cold climate with low milage it should be 0-30 or 5-30 with higher milage 10-30 or 10-40 in warmer climates low milage 5-30 or 10-30 higher milage 10-40
Here is the check list. This should also be in your owners manual.
Brakes and Traction Control
Fluid - Differential
Inspect front/rear axle fluid level and add fluid as needed. Inspect constant velocity joints and axle seals for leaking.Replace
Change engine oil and filter as indicated by the GM Oil Life
System (or every 12 months, whichever occurs first). Reset the
indicator. Never drive the vehicle more than 16 000 km (10,000 miles)
without and oil and filter change. The system will not detect dust in
the oil. If the vehicle is driven in a dusty area, be sure to change
the oil every 5 000 km (3,000 miles) or sooner.