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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 Montero LTD: Getting error PO125. Runs great, temp

Customer Question

Getting error PO125. Runs great, temp gauge between 50-65%. Just bought it today (SES light wasn't on when I test drove it yesterday), it's a 2001 Montero LTD with 139,000 miles, from what I've read it's most likely the thermostat. If it is, can I drive it until I can have it replaced and what will the cost be?
Also, my engine coolant in the resevoir is a brownish color. Does it sound like it just needs flushed?
Submitted: 1 year ago.
Category: Mitsubishi
Expert:  Doug replied 1 year ago.
This model is a bit unique as depending on the emission package P0125 can mean two very different things (one being cooling related like you suspected, the other not so).
Can you provide your VIN so I can see which problem this would point toward?