Check P1638 Fault Code
When you check engine light came on code P1638 the reason should be Engine Light ON (or Service Engine Soon Warning Light). However your vehicle's manufacturer may have a different definition for the P1638 OBD-II Diagnostic Powertrain (P) Trouble Code. So you should chech it on our car models.
Parts or components should not be replaced with reference to only a P1638 DTC. The vehicle service manual should be consulted for more information on possible causes of the fault, along with required testing.
P1638 Possible Fix :
A failing oil pump can cause what's called oil starvation, which is almost always fatal to any engine. Overhead cam engines are especially at risk, because the cam and valve train are farther from the pump than they are in pushrod engines. Oil should be of a proper viscosity, which means it needs to be light enough to move quickly.
P1638 OBD-II Diagnostic Powertrain (P) Trouble Code DescriptionP1638 Can Link ECM/INSTM Circuit / Net so you have to check ODB-II Fault Code Check list.
Reason For P1638 CodeThe reason of P1638 OBD-II Fault Code Check is P1638 Can Link ECM/INSTM Circuit / Net.
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.
What does fault code P1638 mean ?
How to Clear P1638 Trouble Code
An OBD 2 scanner is the best and safest way to erase a DTC from your car's system. This scanner communicates with the car's computer and instructs the computer to erase the code. It does not change or tweak the settings from inside the car or its systems.