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Audi A4 The Audi A4 model offers nimble handling and performance that makes it one of the leading cars in its class. Read more about the Audi A4 in the Audi A4 review.

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  #1  
Old 12-26-2007, 10:05 AM
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Join Date: Dec 2007
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Default Oxygen Sensor Replacement Help - P0135 Fault Code

Good Morning all,

I just bought at 2003 A4 1.8T and after about 200 miles i got a CEL and after scanning it iwth an Global OBDII I got a fault code:
P0135
O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)

Now.. the questions I have regarding this are :
Do I really need to replace my O2 sensor?

If yes... How can I determine it's location in the engine?
Also, Is this a job I can do myself? Is there a reference I can find the location of it in the engine somehow and possibly some instructions as to what steps I need to take to replace it.

Any Help would be appreciated.
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  #2  
Old 12-26-2007, 10:10 AM
4th Gear
 
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Default RE: Oxygen Sensor Replacement Help - P0135 Fault Code

It is on the passenger side, exhaust manifold.
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  #3  
Old 12-26-2007, 10:38 AM
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Default RE: Oxygen Sensor Replacement Help - P0135 Fault Code

Is there a lot of work required to replace it in terms or taking the engine apart?

Are there schematics I can find anywhere?
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  #4  
Old 12-26-2007, 11:35 AM
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Default RE: Oxygen Sensor Replacement Help - P0135 Fault Code

just take it out and clean it with intake cleaner for now. then clear the code and it should come back but keep clearing the code a few times and it might go away.
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  #5  
Old 12-26-2007, 01:00 PM
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Default RE: Oxygen Sensor Replacement Help - P0135 Fault Code

Cleaning will not help the heating circuit.
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2001 A4 1.8T Q Casablanca White, Tip, ESP, Xenon and Premium
Old 12-26-2007, 01:00 PM
 
 
 
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01, 02, 18t, 2003, a4, audi, b6, circuit, code, heater, malfunction, p0135, po135, sensor, vw


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