The engine C1210 is the major thing to check is to validate the action of the VCT solenoid. You are looking for a sticking or stuck VCt solenoid valve triggered by contamination. It refers to car precise repair manual to achieve section tests for the VCT unit. The C1210 engine code is a kind of chassis problem. Like the all car engines, this car engine way services specially advanced hydraulic lifters for the C1210 code intake and finish valves. The lifters can be distorted by disengaging an inner locking pin. The locking pin is disengaged using solenoids to change oil compression fed into the lifter.