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How do you change the bank 1 sensor 1 o2 sensor on a 98 beetle

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You may have to go under car but if yuou can get the air box and hoses off without breaking the vacuum t for the smalle hose you can reach around the motor and get it ou that way it is in the exhaust manifold

Posted on Jul 30, 2009

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Posted on Jan 02, 2017

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SOURCE: have p0130 and p0133 codes 98 toyota tacoma

I would check the O2 sensor, and if it checks bad, replace it, and clear the trouble codes. If the light comes back on, you may need to check further. .

Posted on Oct 28, 2009

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On a Volkswagen Beetle 1999 2.0 is the first cylinder considered upstream or Downstream when replacing the O2 sensor I'm getting a error code reading of P0171 system too lean (Bank 1)


code p 0171 refers to system too lean bank 1=== causes ---intake /exhaust leak---AIR system--MAF/VAF sensor---fuel pressure/pump---injector/s---heated oxygen (HO2S) sensor
the HO2S is the unit that controls the mixture and is located in the exhaust manifold / pipe before the cat converter

the oxygen (O2S) is just like a final trim and reads the cat converter operation and is located after the cat converter

bank one is closest to the fire wall

Dec 24, 2016 | Volkswagen Cars & Trucks

1 Answer

Error code 2005 vw beetle -P2096


code p 2096 refers to post cat converter fuel trim(FT) bank 1 ---too lean===causes --cat converter---exhaust leak
it also refers to heated oxygen sensor (HO2S) 1 bank 1--range/ performance --circuit high====causes --wiring short to positive ---HO2S
replace the HO2S using the correct socket so the wires do not get damaged
for the first one check for an exhaust leak in the flex section of the exhaust pipe under the steel mesh

Nov 29, 2015 | Cars & Trucks

1 Answer

Where is the location of o2 sensor bank 1 sensor 2


Bank #1 referes to the bank with number 1 spark plug follow wire from coil (the numbers are on the coil) if you have any doubts. Sensor #1 would be the one before the catalytic converter on bank #1 and sensor #2 is the one after the catalytic converter closest to rear of vehicle.

Mar 13, 2012 | Dodge Grand Caravan Cars & Trucks

3 Answers

Whats the difference between up and downstream sensor on a chevy s10 1997, what exact sensors do i need for bank 1 and bank 2 sensor1


Well upstream from the Catalatic Converter means towards the engine and that would be the location for Sensor #1 on both sides of the engine. And Downstream would be away from the engine past the Catalatic Converter For Sensor #2 on both sides of the engine. Bank 1 or Bank 2 would indicate which side of the engine the trouble is on. ( Bank #1 is the side of the engine that contains #1 Cylinder. Please remember if you are going to change one 02 Sensor then you should change all of them and be sure to clear all codes after all repairs are finished. that will turn the check engine light off. Good Luck and have a good XMASS.

Dec 18, 2010 | 2002 Chevrolet S-10

1 Answer

Code say ox sensor bank 1 that the motor is running lean i replaced ox sensor , light was out for 10 miles than light came back on


Check plugs see what they look like a lean mixture will look light in color ,compare to the other bank. They need to look all similar,detect a lean fireing cylinder or cylinders on one bank, Could be fuel delivery,from an injector ! Or leaking intake manifold gaskets or bad hoses,leaking vacummn.

Sep 16, 2010 | 2001 Volkswagen Beetle

1 Answer

My 2001 VW Beetle has an error code of PO 171. Too lean bank 1. What does this mean and how do I correct it?


most of the time it's an exhaust leak on bank 1 somewhere betwean the motor and first oxygen sensor

Aug 30, 2010 | 2001 Volkswagen Beetle

1 Answer

1998 Volkwagen Beetle Emissions Trouble Codes


Need to know the codes before we can do anything else.
I'll have to get back to you on the voltage at O2 sensors but they could be ok. Cat's perfect output gotta be 100 degrees lower than input. Get codes and I'll help you out.
Try our manuals section to get spec's.

Mar 07, 2010 | 1998 Volkswagen Beetle

1 Answer

1998 Volkswagen Beetle emissions trouble codes...


if it says bank 1 sensor one it is the first one on the exhaust closest to the manifold.(up stream) if it says bank 1 sensor 2 it is the one after the cat (down stream) but it could be the mass air flow sensor

Mar 07, 2010 | 1998 Volkswagen Beetle

1 Answer

High Emissions


sorry if that is the code it is not correct with the obd format it surpose to have something like P0033 re-check and let us know the correct code

Jun 15, 2009 | 2001 Volkswagen Beetle

1 Answer

2.0 engne - errors codes p0134, p0172, p1128. What is the problem and how od i fix it?


Trouble Code: P0134


HO2S (Bank 1 Sensor 1) Circuit No Activity

Possible Causes:


Leaks present in the exhaust manifold or exhaust pipes

HO2S signal wire and ground wire crossed in connector (voltage jumps)

HO2S element is fuel contaminated or has failed

ECM has failed



Trouble Code: P0172


Fuel System Too Rich (Cylinder Bank 1)

Possible Causes:


Camshaft timing is incorrect, or the engine has an oil overfill condition

EVAP vapor recovery system failure (may be pulling vacuum)

Fuel pressure regulator is damaged or leaking

HO2S element is contaminated with alcohol or water

MAF or MAP sensor values are incorrect or out-of-range

One of more fuel injectors is leaking



Trouble Code: P1128


Long Term Fuel Trim Add. Air. Bank 1 System Too Lean

Possible Causes:


Fuel pressure is too low or fuel quantity supplied is too low

Fuel filter faulty

Transfer fuel pump has failed

Fuel injector is faulty (sticking or not opening)

Engine speed (RPM) sensor is faulty

MAF sensor circuit open

MAF sensor circuit shorted to ground

Air leak in the manifold

Secondary air injection system combi-valve stuck open

Secondary air injection system electrical short

ECM has failed

May 24, 2009 | 2000 Volkswagen Beetle

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