Mercury Grand Marquis U0138 Engine Error Code

When you check Mercury Grand Marquis car engine light came on code U0138 the reason should be . However Mercury manufacturer may have a different definition for the U0138 OBD-II Diagnostic Network (U) Trouble Code. So you should chech it on our car models.

A good ground connection is also extremely important. U0138 Mercury Grand Marquis engine problem because the presence of voltage at the panel harness won't make the panel work if there is a bad ground connection. Since the instrument cluster is mounted in a plastic dash, a separate ground wire or ground circuit through the wiring harness is usually needed to complete the power circuit. Refer again to the wiring diagram to find the ground path, and then check it with your ohmmeter. Do not use a self-powered test light because it cannot measure resistance (any resistance will lower circuit voltage).

Mercury Grand Marquis U0138 OBD-II Diagnostic Network (U) Trouble Code Description so you have to check ODB-II Engine Error Code list. Reason For Mercury Grand Marquis U0138 Code The reason of Mercury Grand Marquis U0138 OBD-II Engine Error Code is .

When you turn on the ignition, the Service Engine Soon or Check Engine U0138 Mercury Grand Marquis light should flash briefly, indicating that the OBD system is ready to scan your vehicle for any malfunctions. After this brief flash, the light should stay off while you drive as long as no problems are detected. If U0138 Mercury Grand Marquis so, you'll be glad to know that your vehicle is equipped with an early warning system that could save you time, money, and fuel in addition to helping protect the !

Mercury Grand Marquis U0138 Possible Solution :

Disconnected, dirty or fouled spark plugs are common causes for engines that won't start. Spark plugs typically need to be replaced every season or 25 hours of use. You should also check that the spark plug gap is set properly. If your spark plugs look good, problems with your ignition system can also preventing a spark. These can range from a faulty spark plug lead, shorted kill switch or flywheel key damage.

What does fault code U0138 mean for Mercury Grand Marquis ? What does a diagnostic reading U0138 mean for Mercury Grand Marquis ? How to fix OBD2 Code U0138 for Mercury Grand Marquis ? What do we know about U0138 code for Mercury Grand Marquis ?