Having problems with your 1998 Lincoln Town Car ?

SCANNER CODE PO420 WHAT IS THE PROBLEM HAVE CHANGED COILS THIS CODE COMES UP EVERY TIME I SCAN CAR JUMPS NOW AND THEN UDER LOAD OR WHEN GOING SLOW

Posted / edited by AnonymousUser on : 12-04-2021

Answers :

Catalyst System Efficiency Below Threshold (Bank 1) \015\012There are a number of things that could be causing this p0420 catalyst efficiency code. The most common thing is the catalytic converter itself is no longer functioning properly. The other likely thing is the rear O2 (oxygen) sensor is no longer working properly. Other things could include exhaust leaks, damaged exhaust pipes, damaged O2 sensor wiring/connectors, plugged catalytic converter, etc.
Repair Help & Product Troubleshooting for 1998 Lincoln Town Car

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