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Need to find the location of bank 2 sensor 2 o2 sensor on 2006 cts

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Posted on Oct 13, 2010


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Hi, I am getting Faulty codes P0036, P0056, P0141, P0161 in reference Bank 1 and Bank 2 for sensors 2 on 2003 CTS.I was told the sensors where changed but codes still appear?

If the sensors were replaced an DTC'S come back has to be a wiring problem or PCM ,
The ECM detects that the HO2S heater low control circuit voltage is between 2.6-4.6 volts when the heater is commanded OFF, indicating an open HO2S heater circuit.
Is the fuse open?
All four codes refer to the heating element circuit ! there is a relay in the under hood fuse box that supplies B+ voltage to the O2 sensor heating elements . I would change that or test the relay , videos on you tube on testing relays .
MAIN Relay
LO SPEED Relay, HI SPEED Relay, S/P FAN Relay, PRE O2 Fuse, IGN-1 Fuse, ECM Fuse, POST O2 Fuse, and INJ Fuse
Also check
POST O2 Fuse
10 A
HO2S Bank 1 Sensor 2 and HO2S Bank 2 Sensor 2
PRE O2 Fuse
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Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 and HO2S Bank 2 Sensor 1

Jul 23, 2016 | 2003 Cadillac CTS

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O2 sensor fuse location

There are two locatons for the fuse and relay llocations one is under the hood on the passenger side and the other is under the back seat!!!

Mar 26, 2014 | 2003 Cadillac CTS

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Wondering where is bank 1 sensor 2 located on a 09 Cadillac cts

Bank one is the side with cylinder one, and sensor two is after the catalytic converter.

Sep 01, 2013 | 2010 Cadillac CTS

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I have a problem with my 2003 cadillac cts code po141 i have replaced the o2 sensor on the passenger side before the cat but i still have the same problem

You do realize you have 4 o2 sensors on the vehicle? Obtaining a reading from its computer (failure code) will not tell you exactly which sensor is faulty. In fact, no device currently that I know of will give you an error code to exactly which o2 sensor is at fault. You may have replaced a good sensor with a new sensor and hopefully you didn't throw the old sensor out. I would put the old sensor back in and start performing the process of elimination method with the known, new sensor. Currently, you are 25% there (2 banks, 2 o2's per bank).

Apr 12, 2011 | 2003 Cadillac CTS

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Need location of coolant temp sensor so it can be replaced

Here it a pic of the CTS for the computercoolant temp sensor

(1) EVAP Canister Purge Solenoid
(2) Fuel Pulse Dampener
(3) Fuel Rail with Injectors
(4) Crankcase Vent
(5) Left Bank Ignition Coils/Modules
(6) Left Bank HO2S Sensor 1
(7) Engine Coolant Temperature (ECT) Sensor
(8) Fuel Pressure Gauge Test Connector
(9) Throttle Position (TP) Sensor
(10) Idle Air Control (IAC)
hope it helps if you need more info just ask!dont forget to vote on the answer thanks have a good day DB

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My 04 cts has two codes po158 an po161

both pertain to the heated o2 sensor// bank 2 -sensor 2 -their is a malfunction with the heated sensor behind the cat converter either wiring problem or bad sensor--check wiring and or sensor for problem

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May 03, 2009 | 2003 Cadillac CTS

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