2004 Chevrolet Aveo A/T 65k miles
Just replaced all 8 exhaust valves because of a broken timing belt. I also replaced the fuel pump with a used unit from a 2005 Aveo. Now that I have put the car back together and now getting the following DTC codes:
p0118 (Engine Coolant Temperature Circuit High Input)
p1781 (Transmission control module TCM mil request circuit)
p0700 (Transmission control system-MIL request)
p0452 (Evaporative Emission Control System Pressure Sensor Low Input)
p0122 (Throttle Position Sensor Low Voltage)
When I start the engine, it immediately revs up to 3500 rpm and drops down to just above idle speed, over the course of 15 seconds. Transmission doesn't shift into 4th gear. Hard shifts when in D, but if I use HOLD and start in 1 and shift up to 2, then D as acceleration build, the shifting is softened. Any help you guys can provide would be hugely helpful!