Mercury Mountaineer U0121 Engine Error Code

When you check Mercury Mountaineer car engine light came on code U0121 the reason should be Engine Light ON (or Service Engine Soon Warning Light). However Mercury manufacturer may have a different definition for the U0121 OBD-II Diagnostic Network (U) Trouble Code. So you should chech it on our car models.

U0121 Mercury Mountaineer engine diagnostic code is about in terms of how often you should get your tyres rotated, it's different for every vehicle and type of tyre, but having them rotated at every oil change is a good rule of thumb. Check with the tyre manufacturer for a more specific time frame. Remember that the more often you rotate your tyres, the more evenly they'll wear, and when you have the tyres rotated, you should also get them checked for balance and alignment.

Mercury Mountaineer U0121 OBD-II Diagnostic Network (U) Trouble Code Description Mercury Mountaineer car U0121 OBD-II Trouble Code Modules connected to the high speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and comm Reason For Mercury Mountaineer U0121 Code The reason of Mercury Mountaineer U0121 OBD-II Engine Error Code is U0121 Lost Communication With Electronic Brake Control Module.

OBD U0121 Mercury Mountaineer code and tailpipe testing are two different approaches to identify vehicles in need of repair. The OBD system looks for broken or malfunctioning emissions control components and , while tailpipe tests sample a vehicle's exhaust to see if it is above or below certain prescribed limits. Given the robust nature of today's emissions control components, it is entirely possible for an individual component to U0121 Mercury Mountaineer malfunction without leading to an immediate increase in emissions at the tailpipe. In such cases, other components (like the catalyst) can temporarily compensate for the part that is broken however, these other components can only do double duty for so long before they, too, begin to malfunction. In addition, OBD also monitors for U0121 Mercury Mountaineer and other malfunctions in the fuel system problems that traditional tailpipe tests were not designed to identify. Most state and local areas also include a gas cap pressure test as part of an emission inspection.

Mercury Mountaineer U0121 Possible Solution :

Power Steering Pressure (PSP) Switch Signal Malfunction The PCM counts the number of times vehicle speed transitions from 0 to a calibratable speed. After a calibratable number of speed transitions the PCM expects that the PSP input should have changed. This DTC is set if the transition is not detected. Vehicle towed with engine running Power steering hydraulic concern was repaired but DTC was not erased PSP switch/shorting bar damaged SIG RTN circuit open PSP circuit open or shorted to SIGRTN PCM damaged Check, if possible, if vehicle was towed or power steering service was performed. Observe PSP V PID while checking wires for intermittents.

What does fault code U0121 mean for Mercury Mountaineer ? What does a diagnostic reading U0121 mean for Mercury Mountaineer ? How to fix OBD2 Code U0121 for Mercury Mountaineer ? What do we know about U0121 code for Mercury Mountaineer ?