The B1438 Code appears for the error of the engine and to solve the problem of the engine, it is necessary to define the code meaning B1438. You do not need to change any component and it is connected with the body of the engine. The reduced running signs are reliable with a MAP sensor fault. In addition, in many cases, a bad MAP sensor will not toss a code. Again, the ELD code likely denotes an isolated wiring issue. The engine system, in conjunction with the engine control module powertrain control module, begains the B1438 code solenoid valve to switch oil compression to the engine mechanism that is connected in the valve system to switch valve timing between High and Low.