I have 2000 Mitsubishi Galant LS V6. My problem is not check engine light being on but it won't come on as it supposed to (for two seconds) when I turn the key. I disassembled the gauge cluster to see if check engine light is burned yet it was not. Besides, I have the same problem with airbag light, it never comes on as it used to be. These two problems has started at the same time. I've checked the check engine light fuse but it is good. I think there might be a short curcuit somewhere in the panel or somewhere else.. Do you think the problem is ECU unit in the fuse box under hood or in another place? Thanks for any help in advance.
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PO170 is a fuel trim malufunction. On a V6 this applies to the rear cylinder head. Lots of possibilities as fu"el trim" refers to the volume air flow sensor, fuel injector, fuel pressure, engine coolant senor, air intake sensor, barometric pressure sensor, oxygen sensor, intake air leaks, or cracks in the exhaust manifold
Waterpump replacement requires removal and replacement of your timing belt. Because of this it is not your typical do it yourself repair. Engine timing is critical, and not having your belt set correctly can lead to catastrophic engine damage.
You can purchase a service manual at your local parts store to get an idea of what is involved, however this being an interference engine you should leave this job to a professional if you are uncertain enough about your abilities that you need to ask for help on it. The cost to replace the waterpump is far far less than the cost to repair a engine that had an incorrectly set timing belt.