Hello municipality. I have recently been driving a ZX, year 1992, 55 KW the following problem: The car drives in places without problems, then it jerks as if the engine wants to go off. It is difficult to describe. The more exposed are so all 500m – 1000m once. I could not detect a speed dependence for the error. I then changed candles, ignition cable and ignition coil, because I thought of an ignition problem, without success Then read out control unit and found error code = 33 According to wrong table is code 33 = intake / absolute pressure sensor WHAT is an intake / absolute pressure sensor AND where can I find THIS AND, could this sensor cause the jerking? I only ask because I don’t want to put a lot of money into the old car. I hope someone can help me gruss