U2478 Engine Code Repair
Meaning of U2478 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.
U2478 Fault Symptoms :
- Check engine light comes on
- Engine stalling or misfiring
- Engine performance issues
- Car not starting
If one of these reasons for U2478 code is occuring now you should check U2478 repair processes.
Now don't ask yourself; What should you do with U2478 code ?
The solution is here :
U2478 Possible Solution:
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.
U2478 Code Meaning :
U
OBD-II Diagnostic Network (U) Trouble Code For Engine
2
Fuel And Air Metering (Injector Circuit Malfunctions Only)
4
Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
7
Cylinder 4 Contribution/Balance Fault
8
Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
Regarding the U2478 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.
U2478 OBD-II Diagnostic Network (U) Trouble Code DescriptionU2478 engine trouble code is about Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical.Main reason For U2478 CodeThe reason of U2478 OBD-II Engine Trouble Code is Throttle/Pedal Position Sensor/Switch A Circuit Intermittent. |
U2478 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.