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U0639 engine code seems a kind of network problem, we try to show one by one the meaning and the solution.
Brief explanation of the U0639 code and definition of U0639 is the bottom side.
Problem is climate control system, lighting, airbags, etc.
|0||SAE - Generic|
|6||Vehicle Speed Control And Idle Control System|
|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 U0639 ?
Like the all engines, the car engine system employs specially developed hydraulic lifters (known as switching roller followers) for the U0639 code intake and exhaust valves. The lifters can be collapsed by disengaging an internal locking pin. The locking pin is disengaged using solenoids to alter oil pressure fed into the lifter.
Regarding the U0639 code, it would probably be worthwhile to carefully inspect the wire harness near the intake manifold bracket. This is done most easily from below the car in the area near the oil filter. When you see U0639 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.