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Doug, ASE Certified Technician
Category: Mitsubishi
Satisfied Customers: 6945
Experience:  Mitsubishi employed and Factory trained ASE certified technician
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Mitsubishi Outlander ES: While driving today the check engine

Customer Question

While driving today the check engine light appeared. Auto Zone used the machine and was unable to tell me wha code P1637 means on a Mitsubishi Outlander 2011. After they disconnected, the light was turned off. What could possibly be the issue?
Submitted: 2 years ago.
Category: Mitsubishi
Expert:  Doug replied 2 years ago.

That is a rather rare fault, being in relation to the power supply to the TCM (not usually an actual part failure of any sort).

Did anything noteworthy happen prior to the light coming on? For example a recent battery replacement, slow cranking on start up recently, maintenance/repairs made to the vehicle etc?
Customer: replied 2 years ago.
A recent change and fuel injection cleaning.
Expert:  Doug replied 2 years ago.
Thanks, ***** *****'t real close proximity to those events though... for example the light didn't come on while leaving from having the maintenance done?