1998 Ford Contour SE 2.5L 24V DOHC Trouble codes

TOMTINA200

MEMBER
1998 FORD CONTOUR

My question is what do you guys thinks is wrong with my car. I had code P0133, P0136, PO141, and P0401 they all are pertaining to Bank 1 sensor 1 and Bank 1 sensor 2. They are the same O2 sensors that I replaced 4 days ago. I had the codes erased already and it seems that it does not want to go away. What else do you think is wrong and also what else can I do. An Autozone guy recommended that I throw in a RxP liquid to decarbonized my engine and fill up with Supreme gasoline maybe that will take care of it also do a tune up. Is that true or is he just trying to sell me the stuff?

5 Replies

CHEVY22

MECHANIC
1,375 POSTS

Old autozone, how many 02 sensors did you replace and in what locations, oh and the p0401 is for egr insufficient flow, so lets get this info and go from there

thanks, jim

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Wednesday, February 28th, 2007 AT 9:08 AM

TOMTINA200

MEMBER
6 POSTS

The O2 sensors replaced where Bank 1 Sensor 1 which is the one just above the catalyc converted wich is closes to the top of the engine. And then Bank 1 sensor 2 which is the one below the catalyc converter. Like 1 feet away. They are both in the same pipe the one in the front of the engine. I have only replaced 2. The autozone guy said they where 4 one is called Bank 2 sensor 1 and Bank 1 sensor 3 those I have not swapped. The Sensor 2 on bank2 is located behind the spark plug coil. And sensor 3 bank 2 is behind catalyc converter between muffler and catalyc converter.

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Wednesday, February 28th, 2007 AT 10:27 AM

CHEVY22

MECHANIC
1,375 POSTS

P0133 left manifold 02 slow response, p0136 circuit malfunction right side of engine behind converter p04021 egr insufficient flow, this could mean a number of things egr is malfunctioning or there is a restriction in the lines in and out usually the egr valve itself very easy to do, looks had but its not pull that main hose off, (big wrench ) and lube it up first, nest pull the two 10 mm bolts off and its out, if you have codes for the 02 sensors that were replaced and you replaced the ones I have stated you may have gotten some bad parts or there is a bad wire going to them but ive never seen a wiring failure unless it burned on the exhaust pipe

let me know
jim

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Wednesday, February 28th, 2007 AT 10:45 AM

TOMTINA200

MEMBER
6 POSTS

Do you think that I should replace the other two? Also I have another question I have some oil leak. Mainly by the heatshield behind the alternator. I had someone look at the engine and they told me that there is oil behind the engine just above a plug that has a * opening. He said that might be loose that it why there is oil all the way up there. Is that true and what it that plug for? Also he said that the Oil pressure sending unit there is no oil come out from there or the valve covers. When is a good time to change all this gaskets? My oils is just dripping no big puddle.

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Wednesday, February 28th, 2007 AT 10:54 AM

CHEVY22

MECHANIC
1,375 POSTS

If you replaced the right sensors as I stated and still have the same codes as I said there may be a faulty part, usually when one goes bad the rest arent far behind, so if you have the money to spare I would say yes but make sure you replaced the ones I said and remember if the same exact codes come up there may be a problem elsewhere and as far as the leak I would really have to see what he is talking about to identify the failure , I wonder if hes talking about the intake gaskets? If you can shoot a pic or two and post em I will try and identify it for you, and really unless a gasket has failed it doesnt need to be replaced, my theory is if its not broke dont fis it

jim