Wont start, was told that it could be the CPU unit or wiring from the fuse box, Car died on me coming home from work, RAC called out and they said that it was the Cam Sensor or the crankshaft sensor but these are ok. eventually a friend looked at it and said that a fuse in the fuse box had completely disintegrated and burnt out. He thinks that it's the fuse box itself or the wiring coming into the box, says that it needs to go on a diagnostic machine. Will this be expensive and is it worth it? Help!!

SOURCE: Check Engine Light - 02 Sensor bad

usually the first O2 sensor inline is the one that's bad.it's the one right off the exaust manifold. this is due to the extreme heat. it get's. but before you go and replace it check to make sure that the plug it's self is not bad

SOURCE: diagnostic code p0135

What engine is in this vehicle? I assume the avalon would be a 3.0L or similar V6 engine. Bank 1 sensor one indicates one of the primary O 2 sensor controlling a/f ratio. Sensor one bank one would be the sensor located in the Front manifold, closest to the engine. Hope this solves your issue. I would first check the conector at this sensor for corrison before buying a new sensor.

SOURCE: Toyota Tacoma won't start Checked fuel pump no power help! MAF?

Are you sure that no water got into the tank? Or into the catalytic converter? I have had alot of cars do this cause I off road all the time. Usually what happens is your intake sucks air into the throttle body and from there your are done tell you drain the oil, change tranny fluid and drain the gas or put a water absorber it in.

SOURCE: wont start after changing the alternator, battery, and MAF sensor

Sometimes the alarm thinks the pos. battery cable has been cut so it kills the ighition. You will have to look in the manual to see how to reset the alarm. You may need a code. If its not the alarm, you may have blown a fuse or worse, fried the computer when you put the alt. in. start at the begining. Check the battery cable connections, battery voltage, alt. wires and connections. if the headlighys work but the car won't start, it's prob. not a "connection" problem.

SOURCE: 92 previa stalls; cranks won't start; efi fuse blown;

wiring loom is faulty get it checked or it can fry your car!