Your Mercury Mariner utilizes an evaporative emissions control (EVAP) system to migrate fuel vapors from the gas tank and fuel filler neck, and sends them to the engine to be burned off. When the pressure inside of the fuel tank is too high, P0453, is thrown and the check engine light comes on. If the only … Read more
P0452 is a generic OBD II code that can occur in the Mercury Mariner. It means that your Mariner’s EVAP system has detected low fuel tank pressure. The evaporative emissions control system (EVAP) sends fuel vapors from the fuel tank to the intake manifold to be burned off. When the pressure in the system is … Read more
P2189 is a DTC code that can occur in your Mercury Mariner. It indicates the air fuel mixture is too lean at idle, specifically in bank 2 (we’ll cover how to find bank 2 later). Its is different from the much more common P0174, which indicates that bank 2 is lean at any engine speed. … Read more
P2187 is a DTC code that can occur in the Mercury Mariner. It indicates the air fuel mixture is too lean at idle. The technical definition for P2187 “System Too Lean at Idle: Bank 1”. The code is thrown after your Mariner’s oxygen sensor on Bank 1 (usually sensor 1) has detected that the air … Read more
There are a few reasons why your Mercury Mariner would be overheating when idling. The most common ones include a bad thermostat, water pump, electric fans, and low coolant level. This guide is intended to help you find the cause of this overheating in the most efficient way possible. So, let’s start with what’s easy … Read more
P0068 in the Mercury Mariner is a generic OBD II code. In layman’s terms, it means that the MAP (manifold absolute pressure) and/or MAF (mass airflow sensor) are providing the Mariner’s computer contradicting data compared to what it should be in relation to the throttle position sensor. The throttle position sensor tells the computer how … Read more
A smoking engine is a serious thing. If your Mercury Mariner’s engine has smoke coming from it, it needs to be addressed right away. It can be caused by quite a few different problems, none of which should be ignored. The most common reasons why your Mariner’s engine would smoke include overheating, burning oil, or … Read more
While it may not leave you stranded, a vehicle that hesitates to start can be very concerning. There are a few reasons why your Mercury Mariner may not be starting, such as a bad starter, a bad battery, bad alternator, and more. Mercury Mariner Hesitates to Start: Causes Here are some of the most … Read more
Sway bar links are responsible for connecting your Mercury Mariner’s sway bar to the chassis. The job of a sway bar is to eliminate body roll by helping the tires keep better contact with the road, which improves the handling characteristics of your Mariner. If you have a bad sway bar link, your vehicle will … Read more
If your Mercury Mariner is shutting down while driving, it’s a real safety hazard. Vehicles are a lot harder to control without power brakes or steering. Below is a list of the most common reasons your Mariner would randomly die while driving. Before looking at anything, is the check engine light on? If it is, … Read more