Vehicle Speed Control Related Problems of the 2009 Mercury Mariner

Table 1 shows five common vehicle speed control related problems of the 2009 Mercury Mariner. The number one most common problem is related to the vehicle speed control (24 problems). The second most common problem is related to the cruise control (two problems).

Table 1. Vehicle Speed Control related problems of Mercury Mariner


Recently reported Vehicle Speed Control problems of the 2009 Mercury Mariner

The Vehicle Speed Control problem

The pcm shorts out and fails when sparkplug and coil packs replaced this cause the steering system to fail speedometer to quit and no transmission connection   Read details...

The Cruise Control problem

Driving on highway with speed control on at 75 mph, all of the sudden vehicle rapidly sped up to 95 mph. The vehicle just took off raving engine up. Applied brakes and took off cruise control. If there had been traffic this could of been a dangerous or deadly incident.   Read details...

The Fail To Accelerate problem

The contact owns a 2009 Mercury Mariner. The contact stated that while driving approximately 25 mph, the vehicle hesitated and lunged forward as the engine warning indicator illuminated. The contact powered the vehicle off and back on and drove the vehicle without incident, however, the failure   Read details...


Vehicle Speed Control related problems in other Mercury Mariner model year vehicles:



Fuel Economy of Mariner Vehicles
Mariner Service Bulletins
Mariner Safety Recalls
Mariner Defect Investigations