your codes:
20 - Electrical Load Detector defective circuit or unplugged / defective sensor

3 - MAP Sensor (Manifold Absolute Pressure) defective circuit or unplugged / defective sensor

4 - CKP Sensor (Crankshaft Position Sensor) defective circuit or unplugged / defective sensor

6 - ECT Sensor (Engine Coolant Temperature) defective circuit or unplugged / defective sensor