The Transmission Range Sensor (also referred to as the PRNDL input an/or neutral safety switch) tells the transmission control module (TCM) an the engine control module (PCM) that the transmission is in park, reverse, neutral, drive, low, 2nd, 3rd etc. It is attached directly to the manual valve of transmission, so when the shift lever is moved from park to drive, the Transmission Range Sensor communicates this critical information to the above mentioned vehicle control module systems.
Some systems require that the actuator has an adequate supply of brake fluid. Low brake fluid levels can mimic the symptoms of code U252D, so consult the manual to locate the brake fluid reservoir. Bear in mind that a low fluid level can set code U252D on some applications, so make sure that on fluid operated systems the fluid level is up to the mark before starting an electrical diagnosis.
Difficulty Level (Soso)
![]() |
Repair Time (50 Min.)
![]() |
Cost Prediction : $ 40-75 |
If your current sense circuit failure 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 U252D and engine control unit are in charge of monitoring a bunch of different current sense circuit failure, and if they get a reading that's a little out of whack, up pops the check engine light.
![]() |
U252D 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. |
You can view according U252D DTC for your car model. We selected several models to see obd2 solutions click and view it.
+U252D Fiat Doblo | +U252D Mercedes A 170 | +U252D Ssangyong Kyron | +U252D Sunbeam-talbot 4-litre | +U252D Pontiac Trans Am |