The B1237 Code has dictionary meaning and each part of the code has meaning. The dictionary meaning is B for Body Code Problem is antilock brake system, steering systems and electronic suspension. 1 for MFG – Manufacturer Specific. 2 for Accelerator Pedal Position Sensor 1 presentation. 3 for Cruise Control Servo Indicates Low and 7 for Cruise Inhibit Control Circuit. About the B1237 code, it would perhaps be valuable to judiciously inspect the wire harness near the intake manifold bracket. This is done most simply from below the car in the zone near the oil filter. You should do it by the professional.