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Where is the po161 at

My check engine light

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2 Answers

How to figure out which 02 senor isn't working


Im assuming there's a check engine light? If so get it scanned at auto zone or another place that scans for free then post code

Jun 15, 2014 | 2003 Ford Crown Victoria

1 Answer

Code po161


P0161: heater circuit malfunction in secondary 02 in bank 2
P0135 Bank 1 Sensor 1 Heater Performance Problem
P0141: HO2S Heater Performance Bank 1 Sensor 2.
02 sensors and or cat converter is issue

Mar 26, 2014 | 1997 Chevrolet Camaro

1 Answer

Car drags upon slow down and **** upon movement


CODE PO161 IS REGARDING OXYGEN SENSOR BANK2 SENSOR2 WHICH IT IS LOCATED IN THE BOTTOM RIGHT SIDE OF THE CAT ON THE OUTPUT OF THE CAT.REGARDING CODE P1135 IS FOR AIR FUEL RATIO OXYGEN SENSOR MALFUNCTION BANK1 SENSOR 1. MY OPINION CHANGE THE SENSOR BANK 2 AND RESET THE FAULT USING A SCANNER AND DRIVE IT. I BELIEVE WILL SOLVE THE PROBLEM.

Aug 31, 2012 | 2002 Toyota RAV4

1 Answer

Po 161 and p1135


PO161 IS FOR OXYGEN SENSOR BANK2 WHICH IS LOCATED IN THE BOTTOM RIGHT OF THE CAT (PASSENGER SIDE ) ON THE OUTPUT OF THE CAT..
P1135 AIR FUEL RATIO OXYGEN SENSOR MALFUNCTION BANK1-IS NOT NEED TO RENEW IT. CHECK WHETHER YOU HAVE THE AIR FILTER CLOGGED,OR WEAK SPARK CABLES OR WORN SPARK PLUGS,AS THESE ARE THE CULPRITS WHICH CAUSING THE AIR FUEL MIXTURE BE OUT OF RANGE AND CAUSE THE OXYGEN SENSOR TO FAIL. MY LAST OPINION CHANGE THE OXYGEN SENSOR BANK 2 ( PO161)AND RESET THE CHECK ENGINE LIGHT USING A SCANNER AND DRIVE IT. IF NO LIGHT COMES ON SHOULD BE THE ONLY FAULT.

Aug 31, 2012 | 2002 Toyota RAV4

2 Answers

Nothing seems to be happening at this time except the check engine light comes on. We checked it with the OB2 and received the PO161 code and erased it, it came back on in a day.


That code is probably for the tundra, I see alot of those with that problem, thankfully toyota will cover the front o2 sensor under warranty however not the back "bank 2 sensor 2"

When replacing this be sure to use a DENSO sensor to ensure it will last as long as possible.

Feb 09, 2011 | Toyota Tacoma Cars & Trucks

3 Answers

My expedition will not idle after start up unless I give it throttle it will die very rich smell coming from exhaust It started out very intermitten now it dies every time I ran a code reader tool but...


Behind the engine where the IAC motor is there is a three dollar
rubber elbow that dry rots and leaks causing a vaccum leak.
In cinjunction with this problem you should also have a check engine light PO161 adaptive fuel system lean bank 1. Once you
replace the elbow or you can buy the new elbow and pcv assembly
for like 13 bucks at ford clear codes and youll be good to go....

Dec 12, 2009 | 2001 Ford Expedition

1 Answer

I have a 1995 saturn sl and it just started idleing up to 3 0r 4 rpm's when i start it and sometimes cuts off going dwn the rd service engine light comes on.this morning the same thang but it now feels...


Sounds Like the Common Item on these Saturns, and that is ( (COIL PACK) you Probably have the Missfire on Matching Cylinder BANK . You DO NEED to Check For Codes to ZERO in on it I think you will see a CODE po161 - 166 < I Believe these are the Codes that set for MISSFIRE .

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Fix code po161 on 95 mustang 3.8


P0161(O2 Sensor Heater Circuit (Bank 2 Sensor 2). ...

Nov 13, 2009 | 1999 Dodge Intrepid

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