What is a valve mismatch in cars. code 300, 302, 420. All togather. Mechanic is telling the truth to do tune up and all. Is iT valve itsef? What is a (bad) coild? MITSUBISHI MIRAGE 2000
2006-10-21 09:36:51 · 1 answers · asked by mnk6 3 in Cars & Transportation ➔ Maintenance & Repairs
Wherever you are get out. You are about to be ripped off. This will probably be too late.
I gather the code you gave is the trouble code, as they are called, from the cars obd.
The code 300 is random / multiple cylinder misfire.
The code 302 is cylinder # 2 misfire
The code 420 is catalytic system below threshold bank # 1
Deciphered this means you have a spark plug misfiring in cylinder #2, bank # 1.
The misfire is causing a rich gas mixture in the exhaust system that is detected by the sensor and therefore it says you have a catalytic converter problem.
I would suggest you replace your spark plugs, if they have a lot of miles on them. Are they the original plugs ? I f so they are probably due.
Get out of there and go find an honest shop that will not rip you off.
Now that you know the problem they can;t cheat.
I don't know what all that other valve business was about but all you have is a misfiring spark plug.
2006-10-21 12:32:17 · answer #1 · answered by tronary 7 · 0⤊ 0⤋