Search engine trouble codes.
Example: P0120
U1939 Volvo S40 engine code seems a kind of network problem, we try to show one by one the meaning and the solution.
Brief explanation of the U1939 Volvo S40 code and definition of U1939 Volvo S40 is the bottom side.
| u |
Network Code Problem is climate control system, lighting, airbags, etc. |
| 1 | MFG - Manufacturer Specific |
| 9 | Fuel And Air Metering (Injector Circuit Malfunctions Only) |
| 3 | Cruise Control Servo Indicates Low |
| 9 | Kick-Down Switch Failed Short |
MFG - Manufacturer Specific codes, which have a '1' as their second digit to indicate they are unique to a particular vehicle make or model. These special codes were deemed necessary by the vehicle manufacturers so they could provide additional diagnostic information beyond the basic list of generic OBD II codes for all kinds of faults, not just emissions-related faults.
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How To Fix U1939 Volvo S40 ?
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. |
Deactivation of cylinders is achieved by releasing a synchroniser pin that normally interlocks the cam follower and rocker arms. U1939 code resolves the synchroniser pin is released using hydraulic pressure which is controlled by a dedicated solenoid. When you see U1939 Volvo S40 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.
