Question about Yamaha Motorcycles
ENGINE FAULT CODE 57
Posted by Anonymous on
Hi, Anonymous I would really love to help you but due to the magnitude of yesterday's solar flare the batteries in my crystal ball are dead and my mental telepathy headset circuitry was melted. I need the year, make, and model of your motorcycle please click on the word "COMMENT" below and provide this information in the box that will open and then click on the green comment box in the bottom right-hand corner after it posts I will receive an "ALERT" icon that will allow me to respond to your information.
Good luck and have a wonderful day.
Posted on May 04, 2017
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Posted on Jan 02, 2017
SOURCE: fault code P0421
Aicux...I had the same problem with a Mitsubishi Montero Sport. The code refers to Warm up Catalytic Converter below threshold (Bank 1) which means the two oxygen sensors before and after the cat closest to the engine are showing a variance that is outside specifications. Bank 1 is on the side of cylinder 1.
I researched and found a cause that was NOT in the list of the usual causes. Generally, this code can be caused by the following:
1 Catalytic converter defective
2 Engine Misfire or similar
3 Large vacuum leak
4 Engine oil leakage into exhaust -valve guide seals, piston rings
I have learned to always look for the simplest solution before paying big bucks for things like catalytic converters, oxygen sensors, etc. I discovered my passengers side manifold was cracked. Took off the heat shield and could see the black residue from exhaust escaping the crack. Got a used manifold from partshotlines.com for $65 and installed it. Reset the code with my OBD-II device and code hasn't returned! Problem solved.
Not sure if this is what's wrong with your, but suggest you chek the simply stuff first. Good luck.
Posted on Sep 26, 2008
been told its something to do with the fuel sender in the tank. i think a wire come adrift, hope this helps, Uni. From Unitracmotorcycles.
Posted on May 22, 2009
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