1997 Lincoln Town Car DTC codes

Tiny
RATHMANN7
  • MEMBER
  • 1997 LINCOLN TOWN CAR
Electrical problem
1997 Lincoln Town Car Two Wheel Drive Automatic 122300 miles

Looking for possible fixes for code P0430, efficiency below threshold in catalyst system; and P0442, small leak for evaporative emission system
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Saturday, November 28th, 2009 AT 4:06 PM

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Tiny
RICKMAR
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OBD-II P0430
Causes:

A code P0430 may mean that one or more of the following has happened:

* The catalytic converter is no longer functioning properly
* An oxygen sensor is not reading (functioning) properly
* There is an exhaust leak

Possible Solutions:
First, inspect for exhaust leaks.
Next step is to measure the voltage at the oxygen sensor on Bank 2.
In fact, it would be a good idea to test each oxygen O2 sensor while you're at it.

OBD-II P0442

Causes
A code P0442 most likely means one or more of the following has happened:

* A loose or improperly affixed "gas" cap
* A non-conforming gas cap (i.E. Not factory/original brand)
* A small leak/hole in a fuel vapor hose/tube
* Other small leak in EVAP system "Vapor Canister Purge Valve"
* Faulty vent o-ring seal

Possible Solutions

With a P0442, the most common repair is to:

* Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back.
* Otherwise, replace the gas cap, or
* Inspect the EVAP system for cuts/holes in tubes/hoses.
* Faulty Vapor Canister Purge Valve.

* ONE TIME I WENT FOR THE MOST EXPENSIVE PART, THE "VAPOR CANISTER PURGE VALVE". IT TOOK CARE OF IT. I PULLED IT OFF A CAR IN THE JUNK YARD (CAN'T BEAT THE PRICE)!
SOMETIMES IT IS JUST A GAS CAP!
You can pull a purge valve off of a car in the Junk or Salvage yard if you have one near by to save some money.

I hope this information helped.
Good Luck;
Rick
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Saturday, November 28th, 2009 AT 11:46 PM

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