Question

On a 1994 Mitsubishi Endeavour, what does the engine codes P0421, P0431, and P0301 mean?

Answer 1

P0301 MITSUBISHI - Cylinder 1 Misfire Condition
Read more: https://www.autocodes.com/p0301_mitsubishi.html

P0421 MITSUBISHI - Warm Up Catalyst Efficiency Below Threshold- Cylinders 1-4
Read more: https://www.autocodes.com/p0421_mitsubishi.html

P0431 MITSUBISHI - Warm Up Catalyst Efficiency Below Threshold- Cylinders 2-3
Read more: https://www.autocodes.com/p0431_mitsubishi.html