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U3774 Engine Code Repair

Meaning of U3774 engine trouble code is a kind of network trouble code and theoretically you can drive for a few weeks or even months with a broken MAF sensor. You will notice a decrease in gas mileage and over time the car will eventually start stalling a lot. At a shop, the replacement cost is between $240-$400 depending on the car, but that's usually the cost of parts because the labor is relatively simple.

U3774 Fault Symptoms :

  1. Check engine light comes on
  2. Engine stalling or misfiring
  3. Engine performance issues
  4. Car not starting

If one of these reasons for U3774 code is occuring now you should check U3774 repair processes.
Now don't ask yourself; What should you do with U3774 code ?
The solution is here :

U3774 Possible Solution:

U3774 Engine

Air Conditioning Pressure Sensor (ACP) Insufficient Pressure Change Each time the A/C clutch engages, the PCM is looking for a pressure change in the refrigerant. If the change in pressure is outside of the calibration the DTC will set. A/C system mechanical failure Open ACP or VREF circuit A/C sensor damaged A/C system electrical failure A/C clutch always engaged Verify A/C system function, including refrigerant charge.

U3774 Code Meaning :

U
OBD-II Diagnostic Network (U) Trouble Code For Engine

3
Ignition System Or Misfire

7
Fuel Temperature Sensor B Circuit Range/Performance

7
Cylinder 4 Contribution/Balance Fault

4
Exhaust Gas Recirculation Sensor B Circuit High

Regarding the U3774 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.

U3774 OBD-II Diagnostic Network (U) Trouble Code Description

U3774 engine trouble code is about Exhaust Gas Recirculation Sensor B Circuit High.

Main reason For U3774 Code

The reason of U3774 OBD-II Engine Trouble Code is Fuel Temperature Sensor B Circuit Range/Performance.

U3774 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.