Mechanics

OBD II SCAN CODE PO421

2003 Mitsubishi Lancer

Engine Performance problem
2003 Mitsubishi Lancer 4 cyl Front Wheel Drive Automatic

I have Mitsubishi lancer 2.0 2003. I am gettting DTC code P0421. Warm Up Catalyst Below Threshold (Bank 1). Is there any harm to the car in driving with engine light on for a long drive (2,000km).
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Madhur4
April 3, 2009.




The only issue this will cause to the performance of your vehicle is very poor fuel mileage. If you have to pass smog inspection tests then this will also cause you to fail the emissions test automatically.

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