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Discussion Starter #1
2000 grand Vit 2.5l check engine light gives P102 code. Mas fault. Checked at shop while running engine miss- fires but no voltage change from sensor. Shop thinks it may be the ecm/ecu going bad. Light come on after a misfires sometimes and then when on may go out after sitting over night. Anyone have any thoughts on what to try?
 

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99 Tracker, 5 door, 2L, 4x4
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10,255 Posts
Run a LIVE DATA scan,, see what the ECU is seeing...

..... Philip
 

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Discussion Starter #3
I had to replace the mass air flow sensor plug and sensor to fix the problem. GV runs like new. The shop wanted 312.00 for the sensor and 200.00 to replace it. I told them the light was out when I picked it up and would wait on the replcement. Bought one on ebay for 28.50 shipped and replaced it myself. Problem solved.:)
I was getting p102 code.
 
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