Question about 1998 Mazda Millenia

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1999 Mazda Millenia Check Engine light

We have had this checked seveal times and they say it is the knock sensor. How do I get the light to turn off? Where is the knock sensor located? How does it effect the car if it is bad?

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It picks up nois inside of the motor it is located in the side of the block under the intake sometimes right above the starter

Posted on Feb 21, 2009

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Where are O2 sensor located on 1998 mazda millenia 2.5 engine?

Posted on Apr 23, 2013

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1 Answer

Got a 2000 millenia s it knocks sounds like its


sounds like the water pump bearing is worn out and has detroyed the water pump shaft seal.
coolant is leaking thru the seal area ,due to the bearing worn out --hence throwing the water pump pulley out of alignment.
The water pump pulley runs of the timing belt.---hence the knocking --either from the pulley or belt chaffing against the timing cover or even throwing the engine timing a few degrees off.
Need to replace water pump and timeing belt and anything else that may be damaged.
That's why, when ever you do a timing belt always do the water pump too.

Dec 28, 2009 | 1999 Mazda Millenia

1 Answer

01 Mazda Millenia 2.5L check engine light


sounds like its a different sensor causing problem. could be TPS SENSOR OR MAP SENSOR .

Dec 06, 2009 | 2001 Mazda Millenia

1 Answer

I have a 1997 Mazda Millenia bought it used. Anyway like 2 days ago a light switch came on (ACS) I don't know what that is and it's been wanting to stall out. Do you have any idea what it might be?


go to autozone & check the code for free mazda millenia they all have problem with the check engine light problem even though you bought all new parts it will still show , but never replace the cat converter most cause the engine light is the sensor only.

Jul 04, 2009 | 1997 Mazda Millenia

1 Answer

Can't pass emissions inspection


TRY DISCONNECTING THE BATTERY CABLE SO THE PCM (COMPUTER) RESETS TO ORIGINAL DEFAULT VALUES. HOPE THIS WORKS FOR YOU. GOOD LUCK

Apr 29, 2009 | 1998 Mazda Millenia

3 Answers

Could check engine light's indicate something minor?


ususlly its something small it also could be that the car has been sitting a while in the car yard you could try disconnecting the battary for 30mns and then reconnecting this some times unscrsmbles the ecu causing the problem good luck

Apr 18, 2009 | 1999 Mazda Millenia

1 Answer

Check engine light 1998 Mazda Millenia ( for emissionwiz)


Check engine light usually indicates an oxygen sensor malfunction. The switch is usually installed in the side of the exhaust pipe near the engine. In the winter the wire that is connected to it often breaks off. It is usually a simple fix for a mechanic.

Jan 16, 2009 | 1998 Mazda Millenia

1 Answer

Check engine light


yes the sensor and it will not go away on Mazda Millenia even though you replace that code it will show another one Mazda Millenia Sucks & Mazda Parts are Expensive too

Jan 15, 2009 | 1998 Mazda Millenia

1 Answer

Check engine light blinking and a sound like air coming from the engine area


I've had the same problem with my 1999 Mazda Protege, 1.6L, Automatic.

The problem was a damaged spark plug, resulting in a loss of compression in one of the cylinders.

Solution: replace all spark plugs and make sure wires are in good condition. I recommend NGK Platinum.

Sep 12, 2008 | 1999 Mazda Millenia

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