U3688 Engine Error Code
When you check engine light came on code U3688 the reason should be . However your vehicle's manufacturer may have a different definition for the U3688 OBD-II Diagnostic Network (U) Trouble Code. So you should chech it on your car models.
U3688 Code Symptoms
Parts or components should not be replaced with reference to only a DTC. The vehicle service manual should be consulted for more information on possible causes of the fault, along with required testing.
Disconnected, dirty or fouled spark plugs are common causes for engines that won't start. Spark plugs typically need to be replaced every season or 25 hours of use. You should also check that the spark plug gap is set properly. If your spark plugs look good, problems with your ignition system can also preventing a spark. These can range from a faulty spark plug lead, shorted kill switch or flywheel key damage.
U3688 OBD-II Diagnostic Network (U) Trouble Code Descriptionso you have to check ODB-II Engine Error Code list.
U3688 Code Review :The reason of U3688 OBD-II Engine Error Code is .
U3688 Code Dictionary Meaning:
u - Network Code - Problem is climate control system, lighting, airbags, etc.
3 - SAE - Generic
6 - Vehicle Speed Control And Idle Control System
8 - Crankshaft Position Sensor Circuit Performance
8 - Park/Neutral Postion (PNP) Switch Circuit Engine Torque Signal Circuit