Code Search

Please fill the "Code Box" to find engine fault code.

Car Models :

Please select your car.

How To Clear Check Engine Lights ?

Ways to clear check engine light on car panel.

Check Engine Light Dictionary

Ways to clear check engine light on car panel.

U3943 Engine Trouble Code

Meaning of U3943 engine trouble code is a kind of network trouble code and U3943 code can be about replacing a broken oxygen sensor can eventually lead to a busted catalytic convertor which can cost upwards of $2,200. Taking your car into a shop will cost you around $210 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.

U3943 Fault Symptoms :

Check engine light comes on
Engine stalling or misfiring
Engine performance issues
Car not starting

If one of these reasons for U3943 code is occuring now you should check U3943 repair processes.
Now don't ask yourself; What should you do with U3943 code ?
The solution is here :

U3943 Possible Solution:

Power Steering Pressure (PSP) Switch Malfunction In Key On, Engine Off Self-Test, this DTC indicates the PSP input to the PCM is high. In Key On, Engine Running Self-Test, this DTC indicates that the PSP input did not change state. Steering wheel must be turned during Key On, Engine Running Self-Test PSP switch/shorting bar damaged SIG RTN circuit open PSP circuit open or shorted to SIGRTN PCM damaged.

U3943 Code Meaning :

U	3	9	4	3
OBD-II Diagnostic Network (U) Trouble Code For Engine	Ignition System Or Misfire	Injector Circuit Malfunction - Cylinders	Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)	Exhaust Gas Recirculation Sensor B Circuit High

Regarding the U3943 code, it would probably be worthwhile to carefully inspect the wire harness near the intake manifold bracket. This is done most easily from below the car in the area near the oil filter.

U3943 OBD-II Diagnostic Network (U) Trouble Code Description

U3943 engine trouble code is about Exhaust Gas Recirculation Sensor B Circuit High.

Main reason For U3943 Code

The reason of U3943 OBD-II Engine Trouble Code is Injector Circuit Malfunction - Cylinders.

U3943 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.

	Example: 0140