Ford Cougar U3940 Engine Trouble Code

Ford Cougar U3940 code can be about replacing a broken oxygen sensor can eventually lead to a busted catalytic convertor which can cost upwards of $2,000. Taking your car into a shop will cost you around $200 depending on the car. However, an oxygen sensor is easy to replace on many cars and is usually detailed in the owner's manual. If you know where the sensor is, you only have to unclip the old sensor and replace it with a new one. Regardless of how you approach it, you should get this fixed right away.

Ford Cougar U3940 Code Meaning :

When you check Ford Cougar car engine light came on code U3940 the reason should be . However manufacturer may have a different definition for the U3940 OBD-II Diagnostic Network (U) Trouble Code. So you should chech it on our car models.

U3940 OBD-II Diagnostic Network (U) Trouble Code Description

U3940 engine trouble code is about Reverse Input Circuit.

Reason For U3940 Code

The reason of U3940 OBD-II Engine Trouble Code is Engine Oil Temperature Sensor Malfunction.

U3940 code on vehicles with electronically controlled automatic transmissions, the 3-4 shift solenoid is responsible for actuating the hydraulic circuits to activate clutches or bands that change gears inside the automatic transmission.

U3939 Previous Engine Trouble Code For Ford Cougar

Next Engine Trouble Code For Ford Cougar U3941