Where should I start. 2009 C70. 143,000 miles. CODES: P1719, P0191, P0087, P0103, P0236, P0101. Sometimes it will die at a stop sign. Sometimes the ANTI-SKID SERVICE REQUIRED comes on. And the TRANSMISSION SERVICE REQUIRED comes on. Sometimes it acts like its in a high gear and takes more pedal to get the car moving. I did change the MAF Sensor which was bad. Didn't seem to help any.