One problem related to engine has been reported for the 2007 Mercury Grand Marquis. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2007 Mercury Grand Marquis based on all problems reported for the 2007 Grand Marquis.
2007 Mercury Grand Marquis. Consumer states defect with computer/powertrain control module the consumer stated when his wife attempted to apply the brake on two separate occasions, the vehicle failed to reduce its speed. Consequently, his wife went through the red light. The consumer took the vehicle to the dealer for an inspection. The dealer asked the consumer did the vehicle have adjustable pedals and when the consumer stated it did, the dealer suggested that maybe his wife put her foot on both pedals simultaneously. The consumer also stated there was message on the instrument panel in french. When he looked at the owners manual, it meant change oil. The consumer believed the message in french, instead of english effected the computer system.