C1242 — Open Circuit in IG1/IG2

If there is a problem with the master cylinder solenoid (skid control ECU) and its power supply circuit. The skid controls ECU stores the diagnostic trouble codes and brings vehicle operation under the fail-safe condition. If the voltage supplied to terminal IG2 is not within the DTC detection range due to malfunctions in parts such as the battery and generator circuit, this OBD2 codes will be present. In Simple terms always check the standard 12V battery condition and measure the voltages when the car is ON and when OFF to ascertain whether it is getting charged or not and then move on to the ABS unit.