Check engine light on code reads P0471 cleared code in about 8 miles light back on
Exhaust back pressure sensor
SOURCE: 2001 LINCOLN LS V6 - ROUGH IDLE / SOMETIMES STALLING.
Very common problem is about a dime size hole wearing in the rubber elbow on the PCV valve located on the driver side rear of the intake manifold.
SOURCE: 2000 Ford Taurus Flex Fuel V6. Check engine light
your code is or the following. Fuel Pump Secondary Circuit Malfunction. This may involve removing your gas tank to fix. Go to the parts store and they can get you the parts you need and let you know for sure.
SOURCE: 2001 Avalon Check engine codes P0440,p0441 and p0446.
yes it would be a smart thing to do and no it is not that hard it should onlt have two bolts holding it on
SOURCE: Chevy Impala 2001 w/ 3.8L engine - EGR stuck open
there are a couple of things, first make sure there are not restriction in the exhaust, i know the dealer has had to replace converters under warranty because of this problem, then theres a reflesh program for the computer due to this problem, and lastly,run with egr off make sure it clean of carbon,carbon gets stuck in pintle sets check eng lightbut carbon then blows by so when you remove egr you see nothing, well start with these good luck.
SOURCE: p0471 and p2002 codes, Audi A6 2.0 DPF S-Line Auto
A6 2.0 TDI 1997
Got same problem around 35000Km. Engine light on with same error P0471. I was in France, Audi reset error and found nothing suspect. 4 weeks later same problem. (I felt engine was executing filter regeneration cycle very often). After 1 more week, Exhaust symbol came into large display and engine into safe mode (max 90Km/h). Contacted my Audi dealer in Belgium. They immediately told me pressure sensor (measures obstruction over DPF) was defective ; happens more often. Car was just beyond 2 Y old. Replaced under warranty. No more problems.
The information below was complied by me, it explains what causes the check engine light to come on and the process of finding the cause.
When the Check Engine light (or Service Engine Soon) is turned on, the systems computer control unit (called the PCM) has sensed a fault in the electronic controls of the engine and/or the emission system. When this happens you will seldom feel the car engine run any different. There are about 200 possible system faults (the gas cap is just one of them) that turn the Check Engine light on, to know what has developed a problem you must have the system tested, this is called an OBD2 fault code test, Kragen/Oriley and Autozone parts stores (USA only) do this testing for free.
Low Fluid levels do not turn on the CEL
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