Question about 2002 Buick Rendezvous

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I have two trouble codes came up and I can't find a repair manual for this car. The one trouble code is PO135B H02S Htr Perf Sens 1, the Second is P1189C Eng oil pressure (EOP) Switch Circuit. Do you have a repair manual with these codes and repair manual to show were these items are located.

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  • John J. Rozzi Jr Mar 28, 2011

    I did find the H02 on the manifold but is recessed and needs a special tool. As for the oil sending unite is not were you said it should be. Any place else I could look for the sending unite, the knock senser is next to the oil filter. Any help on the tool and the oil sending location would be appreciated.

    Thanks John

  • John J. Rozzi Jr Mar 30, 2011

    I was able to rent the special tool to remove the 02 sensor. As for the oil sending switch it is located above the starter motor . It can be removed with out removing the stater, it only has one wire and faces out like the knock sensor. Thanks for your help John

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The code you gave for the o2 sensor is not correct.There is no such code as p0135B.It is p0135 with no B .The usual problem is with the heater which is in the sensor itself.Unless you have wiring problems.Check the wiring and the connector and if it is all good then replace the o2 sensor1.This is the one that is on the same bank as the number 1 cylinder and on the exhaust manifold.The number one cylinder is on the back side of the motor.These are the odd number cylinders.The o2 sensor on the exhaust manifold on this head will be the one you need to replace.The p1189 is correct but there is no c at the end.The What you need to check here is the wiring and the connections also.If there is oil on the connector then clean it with brake cleaner and replace the oil sending unit.This is located next to the oil filter.Let me know what you find out.Good luck.

Posted on Mar 24, 2011

  • Salvador Quintanilla Mar 29, 2011

    You should be able to get a socket for the o2 sensor at any parts store.The oil pressure switch is where I told you but your looking at the wrong one.The oil pressure switch is lower on the engine block.The knock sensor is facing out and them oil pressure switch is facing out.It will have a tan/black wire on the connector.You will probably need a oil sending unit socket to remove the sending unit.This is also a special socket,but you should be able to get this at any parts store to.Hope this helps.Good luck.

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