U0939 Citroen Sm Engine Fault Code

Check Solution For U0939 Citroen Sm OBD Code :

U0939 Citroen Sm engine code seems a kind of network problem, we try to show one by one the meaning and the solution.
Brief explanation of the U0939 Citroen Sm code and definition of U0939 Citroen Sm is the bottom side.

U0939 Citroen Sm Meaning :

u Network Code
Problem is climate control system, lighting, airbags, etc.
0 SAE - Generic
9 Fuel And Air Metering (Injector Circuit Malfunctions Only)
3 Cruise Control Servo Indicates Low
9 Kick-Down Switch Failed Short

SAE - Generic codes, which have a '0' as their second digit to indicate they are common to all makes and models of vehicles. These are the codes that are required for basic emissions fault diagnosis.

How To Fix U0939 Citroen Sm ?

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.

U0939 Citroen Sm Code Description:

Deactivation of cylinders is achieved by releasing a synchroniser pin that normally interlocks the cam follower and rocker arms. U0939 code resolves the synchroniser pin is released using hydraulic pressure which is controlled by a dedicated solenoid. When you see U0939 Citroen Sm engine fault code on your engine code reader this description will help you.

U Codes List of all Network codes.

Final Step: In the definitions listed below, there is a test drive recommended after you've completed any repairs to see if the condition is fixed. Before you take a test drive after a repair, always erase the U Code(s) first. This will turn the check engine light off and then you will know if the check engine light returns, you've got further diagnostics to complete.

BE CAREFUL !
This engine code information is presented for information purposes only. This is not intended as repair advice and we are not responsible for any actions you take on any vehicle.

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