U3804 Trouble Code

View U3804 obd/2 error code description and symptoms. U3804 engine photo

Vehicle Speed Sensor (VSS) Intermittent Indicates the powertrain control module (PCM) detected an error in the vehicle speed information. Vehicle speed data is received from either the vehicle speed sensor (VSS), transfer case speed sensor (TCSS), anti-lock brake system (ABS) control module, generic electronic module (GEM), or central timer module (CTM). This DTC is set the same way as U3804. However, it is intended to flash the transmission control indicator lamp (TCIL) for first time VSS circuit error/malfunctions. Refer to possible causes for U3804

Some systems require that the actuator has an adequate supply of brake fluid. Low brake fluid levels can mimic the symptoms of code U3804, so consult the manual to locate the brake fluid reservoir. Bear in mind that a low fluid level can set code U3804 on some applications, so make sure that on fluid operated systems the fluid level is up to the mark before starting an electrical diagnosis.

U3804 Error Code Repair Process :

If your slip solenoid system check engine light is illuminated, it's best to take it in for diagnostic testing, which can feel like a hassle. Because while the lights vary in appearance from vehicle to vehicle, all have the same basic meaning: There's a problem with the car's emissions system. The on-board diagnostics system U3804 and engine control unit are in charge of monitoring a bunch of different slip solenoid system, and if they get a reading that's a little out of whack, up pops the check engine light.

U3804 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.

Common Causes of U3804

A common cause of code U3804 is the failure of Slip Solenoid System, but there are several other possible causes as well, such as ;

EVAP system hose leaking
EVAP canister or fuel tank leaks
EVAP system hose leaking
Oil flow restriction in the oil passages or the variable camshaft timing (VCT) valve body

U3804 code for all cars

You can view according U3804 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+U3804 Subaru 1600

+U3804 Talbot Tagora

+U3804 Vauxhall Wyvern

+U3804 Honda Fuya

+U3804 Porsche 930

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

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