Search engine trouble codes.
U0398 engine code seems a kind of network problem, we try to show one by one the meaning and the solution.
Brief explanation of the U0398 code and definition of U0398 is the bottom side.
Problem is climate control system, lighting, airbags, etc.
|0||SAE - Generic|
|3||IC Module 4X Ref Circuit Intermittent, No Pulses|
|9||Crankshaft Position Sensor Circuit Performance|
|8||PCM Stack Overrun|
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 U0398 ?
While fuel economy was increased, acceleration was seriously compromised, and the loss of engine vacuum led to a dangerous loss of braking assist when the U0398 code system was in four-cylinder mode. In addition to these issues, while the company proposed a hydraulically controlled system that could be switched from within the car, the version they implemented had to be manually changed in the engine compartment using hand tools.
The catalytic converter has an oxygen sensor in front and behind it. When the vehicle is warm and running in closed loop mode, the upstream oxygen sensor waveform reading should fluctuate. When you see U0398 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.