U1178 Mercury Capri OBD Code

OBD/2 U1178 error code description and symptoms.

The Transmission Fluid Pressure Switch allows the engine's control module (PCM) or Transmission Control Module (TCM) to use hydraulic fluid to engage the clutches in the transmission to allow for smoother shifting while driving. If the PCM or TCM detects an issue with the hydraulic clutch or the pressure switch, the PCM or TCM will set code U1178

As long as the throttle plate remains closed, the idling speed and quality is controlled by the PCM via the idle control valve, and as can be seen from the above it should be clear that idle control on a gasoline engine is a complex affair. For instance, if the engine is started in sub-zero temperatures, the PCM will command the idling control valve to allow less air to enter the engine to enrich the air/fuel mixture to create a condition which is roughly analogous to how chokes worked on carburetted engines to control idling in cold weather.

U1178 Mercury Capri Error Code Repair Process :

For u1178 scp (j1850) invalid or missing data for climate control (hvac) check engine light is perhaps the most troubling of lights because it could mean so many different things, from you didn't screw the gas cap on tightly enough to look out for pistons flying through the hood and into the stratosphere. The easiest way to find out what this light is telling you is to hook your vehicle up to a scan tool. U1178 error code diagnostic tool looks a little like an oversized calculator and plugs into a communication port inside the car. After you instruct it to perform the scan, it speaks u1178 scp (j1850) invalid or missing data for climate control (hvac) with your car's computers to find out exactly what's prompting the light to turn on.

Common Causes of Mercury Capri U1178 OBD2 Code

A common cause of code U1178 is the failure of U1178 SCP (J1850) Invalid or Missing Data for Climate Control (HVAC), but there are several other possible causes as well, such as ;

Continuous oil flow to the VCT piston chamber
Continuous oil flow to the VCT piston chamber
EVAP system hose leaking
Faulty Intake Valve Timing Control Solenoid Valve

U1178 is a kind of Network Trouble Code

U-code indicates that engine communication errors and shows lost communication with engine parts.U-Codes are fairly straight forward, given all of the articles and technical publications that have been written regarding these problematic codes. In most cases, it just comes down to identifying the module that isn't communicating with the other modules on the CAN bus line for whatever reason.

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

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U1178 Mercury Capri OBD Code

U1178 Mercury Capri Error Code Repair Process :

Common Causes of Mercury Capri U1178 OBD2 Code

U1178 code for other Mercury cars