Computer codes 34 & 35

Type: OBD 1 & your codes

OBD1 GM Code 65

more than likey in the dash board side and if not there under the hood - but check you owners manual first for the info

Code 12 is normal and indicates comms with computer are ok.
Code 34 is either:

• MAP Sensor [voltage low]
• MAF Sensor

Code 42 is for the EST circuit

Generally speaking, code 35 is a problem with the idle air control valve.
The valve is mounted on the side of the throttle body and controls idle speed by how much air is allowed into the intake manifold.

check the basics first. Fuel and Spark.

The PO300 code is random/multiple cylinder misfire detected. Sinsc you have the code PO302, that means that cylinder 2 is the one misfiring, usually a bad coil pack, or spark plug.

Appears to be the code for the camshaft position sensor, or cam sensor circuit. Around $35-45.00 for the part at an auto parts store. Have the part replaced. And take it from there. Might be a good thing to replace the spark plugs and wires too.

Code 22 is Throttle position sensor was under 0.25 volts for 4 seconds after ignition was on. Code 34 is map sensor voltage was too low for 1 second under 600rpm or over 600rpm. A tps must be set with a voltage meter or scan tool for correct operation. Check the map sensor vacuum hose for leaks.

check the fuel pressure it could be the fuel pressure regulator

The SE and LE indicate opinions on the cars. Most of the parts will interchange. When doing engine changes, the best way is to swap the ECM also.