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Unread 06-04-2011, 07:52 AM   #1
cmabolt
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2001 XJ Cherokee 
 
Join Date: Jun 2011
Location: baltimore, md
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Emission issues

Hello all, I have been having issues with two codes. 4055, 4032. I have decided to deal with them one at a time. I have replaced the converted and 02 sensor on the rear manifold, but 4032 code persists. Any ideas as to what it could be now.

As for the 4055, I plan on getting a smoke test and go from there.

Urggg. Any help would be much appreciated as I am trying to get through emissions test.

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Unread 06-04-2011, 09:08 AM   #2
Saudade
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How did you pull those codes? Those are not normal OBD-II codes.
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Unread 06-05-2011, 08:10 AM   #3
cmabolt
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I was abbreviating. I used a code puller. PO4055, PO4032
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Unread 06-05-2011, 09:32 AM   #4
CJ7-Tim
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P0432 (M)1/2 Catalytic Converter Efficiency. Catalyst 2/1 efficiency below required level.

SYMPTOM
P0432 - 2/1 CATALYTIC CONVERTER EFFICIENCY

SET CONDITION
As catalyst efficiency deteriorates, the switch rate of the downstream O2 sensor approaches that of the upstream O2 sensor. If at any point during the test the switch ratio reaches a predetermined value a counter is incremented by one.

POSSIBLE CAUSES

-Exhaust leak
-Catalytic converter 2/1 faulty
-Upstream O2 sensor older than downstream O2 sensor
-engine misfire or running condition
-large vacuum leak
-engine oil leakage into exhaust-valve guide, seals, piston rings




P0455 (M) Evap Leak Monitor Large. Leak Detected A large leak has been detected in the evaporative system.

Buy a new gas tank cap. Check the hoses and fittings from the Evap solenoid and LDP for loose hoses/fittings or damage.
Also check for disconnected or damaged wires.

.
evap-wldp.jpg  
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Unread 05-31-2012, 05:27 PM   #5
SpideYJeep
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Reviving old thread because I'd like to see what was the outcome of the smoke test as I just bought an '01 XJ which popped up the CEL and code a day after purchase.
Thanks!
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