C2491 Mercury Monarch OBD Code

OBD/2 C2491 error code description and symptoms.

The issue covered by the bulletin involves a power steering noise/whine or fluid leak from the power steering pump, gear or high pressure side power steering hose during extreme low outdoor temperature operation.

Gear changes are accomplished by a command from the TCM to energize the clutch actuator to release the clutch; after which various actuators inside the transmission disengage the current gear, and depending on current operating conditions, engage the next higher or lower gear ratio. All of this happens much faster than a human driver could change gears, and in most applications, gear changes are as smooth and seamless as on any fully automatic transmission.

C2491 Mercury Monarch Error Code Repair Process :

OBD C2491 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 transmission overtemperature condition, 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 C2491 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 C2491 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.

Common Causes of Mercury Monarch C2491 OBD2 Code

A common cause of code C2491 is the failure of Transmission Overtemperature Condition, but there are several other possible causes as well, such as ;

Exhaust gas leaks
Faulty Variable Camshaft Timing (VCT) position solenoid
Improper ignition timing
Variable Camshaft Timing solenoid stuck open

C2491 is a kind of Chassis Trouble Code

Diagnosing chassis noises can be one of the most frustrating problems technicians face. Fortunately, manufacturers have engineered noise, vibration and harshness (NVH) diagnostic techniques and equipment to find the source of the noise.

Engine OBD 2 Codes website is a freeware resource center for engine trouble codes.

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C2491 Mercury Monarch OBD Code

C2491 Mercury Monarch Error Code Repair Process :

Common Causes of Mercury Monarch C2491 OBD2 Code

C2491 code for other Mercury cars