The B1394 Code appears for the error of engine and it is necessary to solve the problem of engine. The code is connected of body of engine. You need to fix the problem if you want to use the engine for running your car. The Power Steering Pressure Switch Malfunction Engine Off Self-Test, In Key On, this DTC designates the PSP input to the PCM is high. In Key On, this DTC agrees that the PSP input did not alter state. Routing wheel must be twisted during Key On, Engine Running Self-Test PSP switch or shorting bar hurt SIG RTN circuit open PSP trip shorted or open to SIGRTN PCM damaged.