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Thread: Car throwing engine fault codes.... p0102 (Solved: new MAF sensor)

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    Senior Member strawboss's Avatar
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    Car throwing engine fault codes.... p0102 (Solved: new MAF sensor)

    On the way home yesterday my 2015 Mirage started acting as if the cvt was slipping then the idiot light for p0102 (Maf sensor) would light, that I could clear with my Scan Gauge. The other 2 fault lights were for the ASC (traction control?) one showing a fault, the other warning it is 'off'...those 2 didn't show a code that my Scan Gauge could detect.

    The car got me home but the engine was running progressively worse, to the point where I couldn't drive it, the cvt was also not working properly, wouldn't shift up.

    I pulled the driver's side kick panel as those (5?)plugs that are prone to corrosion reside there and I cleaned them thoroughly, (twice) with Deoxit5/contact cleaner... dielectric grease,and compressed air.I looked at the Maf but didn't have the proper cleaner/solvent so left it alone.The Maf's aren't cheap btw...$199 Cdn at Crappy Tire....

    No improvement so I slept on it...

    This morning I called the dealer and made an appointment, priced a tow truck as I couldn't drive it in its present condition 69 km away. It must've overhead my conversations because when I went out to move it for the tow it ran like brand new!
    All the way into town & back 20 Km with out a hiccup, the little bugger....I'm gonna look into corrosion proofing/eliminating those plugs, I think Fummins has moved some of these up higher from the floor on some cars and eliminated them entirely on others.


        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage ES Plus 1.2 automatic: 38.2 mpg (US) ... 16.2 km/L ... 6.2 L/100 km ... 45.9 mpg (Imp)


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    Senior Member Fummins's Avatar
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    Quote Originally Posted by strawboss View Post
    On the way home yesterday my 2015 Mirage started acting as if the cvt was slipping then the idiot light for p0102 (Maf sensor) would light, that I could clear with my Scan Gauge. The other 2 fault lights were for the ASC (traction control?) one showing a fault, the other warning it is 'off'...those 2 didn't show a code that my Scan Gauge could detect.

    The car got me home but the engine was running progressively worse, to the point where I couldn't drive it, the cvt was also not working properly, wouldn't shift up.

    I pulled the driver's side kick panel as those (5?)plugs that are prone to corrosion reside there and I cleaned them thoroughly, (twice) with Deoxit5/contact cleaner... dielectric grease,and compressed air.I looked at the Maf but didn't have the proper cleaner/solvent so left it alone.The Maf's aren't cheap btw...$199 Cdn at Crappy Tire....

    No improvement so I slept on it...

    This morning I called the dealer and made an appointment, priced a tow truck as I couldn't drive it in its present condition 69 km away. It must've overhead my conversations because when I went out to move it for the tow it ran like brand new!
    All the way into town & back 20 Km with out a hiccup, the little bugger....I'm gonna look into corrosion proofing/eliminating those plugs, I think Fummins has moved some of these up higher from the floor on some cars and eliminated them entirely on others.
    Yeah the lowest connector behind the kick panel got relocated or cut out completely and the wires all soldered together on most of the work cars. I don't think the maf wires run through there though? Maybe. One other place to check(if you're into that kinda thing) is the wiring harness on the engine. I'm pretty sure I had one car that a pinched or broken wire to the maf not far from the sensor connector itself. The harness seem to be zip tied to tight and don't have enough tap on the harness so the zip ties cut through the wires.

    The quick and easy thing to try would be fire it up and start wiggling the wiring harness from the maf to the main harness and keep going back towards the battery a little ways. If it stumbles you found the break.

    https://mirageforum.com/forum/showthread.php/9207-P0107


    For the 2015 Mirage below, I can't remember if the abs codes were related or not. I ended up changing the purge vent solenoid (on the drivers side of the cylinder head) cause it kept throwing lean codes and was hard to start after fueling up.
    https://mirageforum.com/forum/showth...ll=1#post90483
    Last edited by Fummins; 11-04-2021 at 04:34 PM.

        __________________________________________

        click to view fuel log View my fuel log 2014 Mirage SE wussie cvt edition. 1.2 automatic: 37.7 mpg (US) ... 16.0 km/L ... 6.2 L/100 km ... 45.3 mpg (Imp)


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    Senior Member strawboss's Avatar
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    Yah, I might just cut that lowermost harness out altogether. I had the same thought that the maf trouble light was coincidental to the corroded plug issue, I'll check for a broken conductor. I found some CRC maf sensor cleaner at CTC but the directions specifically preclude use on Mitsubishi sensors....sucks.

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage ES Plus 1.2 automatic: 38.2 mpg (US) ... 16.2 km/L ... 6.2 L/100 km ... 45.9 mpg (Imp)


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    Seems like there was a thread on here where a member found those MAF sensor wires almost broken off at the connector for the MAF sensor. And had really good pictures where he rewired it. I'll see if I can find that thread, and come back in here and link it.

    It was MIVEC related, from Cobrajet. Probably not related. But linking all the same.

    https://mirageforum.com/forum/showth...control-valve)
    Last edited by 7milesout; 11-04-2021 at 07:51 PM.

        __________________________________________

        click to view fuel log View my fuel log 2020 Mirage ES 1.2 manual: 42.5 mpg (US) ... 18.1 km/L ... 5.5 L/100 km ... 51.0 mpg (Imp)


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    Senior Member Fummins's Avatar
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    Quote Originally Posted by 7milesout View Post
    Seems like there was a thread on here where a member found those MAF sensor wires almost broken off at the connector for the MAF sensor. And had really good pictures where he rewired it. I'll see if I can find that thread, and come back in here and link it.

    Attachment 22360 Attachment 22361

        __________________________________________

        click to view fuel log View my fuel log 2014 Mirage SE wussie cvt edition. 1.2 automatic: 37.7 mpg (US) ... 16.0 km/L ... 6.2 L/100 km ... 45.3 mpg (Imp)


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    Senior Member strawboss's Avatar
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    This was just posted on a FB mechanics group I belong to...."What does it mean when this light comes on?"Name:  CHECKJENGINELIGHT.jpg
Views: 98
Size:  88.4 KB

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage ES Plus 1.2 automatic: 38.2 mpg (US) ... 16.2 km/L ... 6.2 L/100 km ... 45.9 mpg (Imp)


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    Fummins (11-04-2021)

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    Senior Member Fummins's Avatar
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    Quote Originally Posted by strawboss View Post
    This was just posted on a FB mechanics group I belong to...."What does it mean when this light comes on?"Name:  CHECKJENGINELIGHT.jpg
Views: 98
Size:  88.4 KB
    It's fine! That looks similar to an astro van I had to tow away one time. A co-workers friends dad tried to change his starter without unhooking the battery first(actually didn't unhook it at all ever). Starter shorted out and the guy got scared and bailed. It burnt to the ground lmao! I'll find a pic
    Found it! Attachment 22363
    Last edited by Fummins; 11-04-2021 at 09:54 PM. Reason: Too much info

        __________________________________________

        click to view fuel log View my fuel log 2014 Mirage SE wussie cvt edition. 1.2 automatic: 37.7 mpg (US) ... 16.0 km/L ... 6.2 L/100 km ... 45.3 mpg (Imp)


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    Senior Member strawboss's Avatar
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    Quote Originally Posted by Fummins View Post
    It's fine! That looks similar to an astro van I had to tow away one time. A co-workers friends dad tried to change his starter without unhooking the battery first(actually didn't unhook it at all ever). Starter shorted out and the guy got scared and bailed. It burnt to the ground lmao! I'll find a pic
    Found it! Attachment 22363
    This looks like my eldest brother's Chevette, he installed a new top terminal battery that was just a 'little' too tall then went on vacay....
    Last edited by strawboss; 11-04-2021 at 10:39 PM. Reason: spelling

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage ES Plus 1.2 automatic: 38.2 mpg (US) ... 16.2 km/L ... 6.2 L/100 km ... 45.9 mpg (Imp)


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    Senior Member klroger's Avatar
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    Quote Originally Posted by strawboss View Post
    This looks like my eldest brother's Chevette, he installed a new top terminal battery that was just a 'little' too tall then went on vacay....
    Yeah, GM used the side post batteries for a reason...
    I didn't know what to do, so I didn't do anything

        __________________________________________

        click to view fuel log View my fuel log 2018 Mirage GT 1.2 automatic: 38.4 mpg (US) ... 16.3 km/L ... 6.1 L/100 km ... 46.2 mpg (Imp)


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    strawboss (11-05-2021)

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    Senior Member strawboss's Avatar
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    The same 3 trouble lights came back this morning on the highway, drat. I was pointed towards the dealer anyways so just kept driving....hopefully I get some news by tuesday....


        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage ES Plus 1.2 automatic: 38.2 mpg (US) ... 16.2 km/L ... 6.2 L/100 km ... 45.9 mpg (Imp)


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