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U1123 Engine Code Repair

Meaning of U1123 engine trouble code is a kind of network trouble code and when your car's 'U1123 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.

U1123 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 U1123 code is occuring now you should check U1123 repair processes.
Now don't ask yourself; What should you do with U1123 code ?
The solution is here :

U1123 Possible Solution:

U1123 Engine

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.

U1123 Code Meaning :

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

1
Fuel And Air Metering

1
Ambient Air Temperature Sensor Circuit Low

2
Engine Shutoff Solenoid Malfunction

3
Glow Plug/Heater Circuit 'A' Malfunction

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.

U1123 OBD-II Diagnostic Network (U) Trouble Code Description

U1123 engine trouble code is about Glow Plug/Heater Circuit 'A' Malfunction.

Main reason For U1123 Code

The reason of U1123 OBD-II Engine Trouble Code is Ambient Air Temperature Sensor Circuit Low.

U1123 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.