Logo

U0903 Engine Code Repair

Meaning of U0903 engine trouble code is a kind of network trouble code and when the check engine light comes U0903 code on the first you should check is the gas cap. Pull over, retighten it, and take a look at the cap to see if it has any cracks in it. Continue driving and see if the check engine light turns off. Alternately, you can purchase a gas cap for about $3 at an auto parts store. All you need to do is take the old one off and screw on the new one. If you've already made it to the store, you might as well just replace it. While not car-threatening, it's good to take care of this right away to improve gas mileage.

U0903 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 U0903 code is occuring now you should check U0903 repair processes.
Now don't ask yourself; What should you do with U0903 code ?
The solution is here :

U0903 Possible Solution:

U0903 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.

U0903 Code Meaning :

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

0
Intake Valve Control Solenoid Circuit Low

9
Engine Oil Temperature Sensor Malfunction

0
Crankshaft Position Sensor A Circuit Malfunction

3
Glow Plug/Heater Circuit 'A' Malfunction

The poor running symptoms are consistent with a MAP sensor malfunction. In addition, in some cases, a bad MAP sensor will not throw a code. Again, the ELD code likely represents a separate wiring issue.

U0903 OBD-II Diagnostic Network (U) Trouble Code Description

U0903 engine trouble code is about Glow Plug/Heater Circuit 'A' Malfunction.

Main reason For U0903 Code

The reason of U0903 OBD-II Engine Trouble Code is Engine Oil Temperature Sensor Malfunction.

U0903 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.