U3478 Engine Code Repair
Meaning of U3478 engine trouble code is a kind of network trouble code and when your car's 'U3478 Check Engine' light comes on, it's usually accompanied by a sinking feeling in the pit of your stomach. The light could mean a costly problem, like a bad catalytic converter, or it could be something minor, like a loose gas cap. But in many cases, it means at minimum that you'll be visiting the car dealer to locate the malfunction and get the light turned off.
U3478 Fault Symptoms :
- Check engine light comes on
- Engine stalling or misfiring
- Engine performance issues
- Car not starting
If one of these reasons for U3478 code is occuring now you should check U3478 repair processes.
Now don't ask yourself; What should you do with U3478 code ?
The solution is here :
U3478 Possible Solution:
Excessive air inflow can be caused by a vacuum leak, a dirty sensor or, an exhaust gas recirculation valve not closing properly. If the problem is not enough fuel, the culprit may be dirty injectors or fuel filters, a weak fuel pump or a leaky fuel pressure regulator. The lean fuel mix error may be accompanied by rough idling, engine misfires, hesitation during acceleration and overall poor engine performance.
U3478 Code Meaning :
U
OBD-II Diagnostic Network (U) Trouble Code For Engine
3
Ignition System Or Misfire
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
The oxygen (02) sensors on your car measure the oxygen in the exhaust to determine how rich or lean the ratio of fuel and air are in the cylinders. Optimizing this mixture means better fuel economy and fewer exhaust emissions.
U3478 OBD-II Diagnostic Network (U) Trouble Code DescriptionU3478 engine trouble code is about Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical.Main reason For U3478 CodeThe reason of U3478 OBD-II Engine Trouble Code is Throttle/Pedal Position Sensor/Switch A Circuit Intermittent. |
U3478 the main thing to check is to verify the operation of the VCT solenoid. You're looking for a sticking or stuck VCt solenoid valve caused by contamination. Refer to vehicle specific repair manual to perform component tests for the VCT unit.