Yoyon

I have those codes on my 96 Acura TL, can somebody tell me what to do?

P0135
41
Primary HO2S Heater Circuit Malfunction

P0141
65
Secondary HO2S Heater Circuit Malfunction

tmnhs81

replace both O2 sensors.

Yoyon

Wow they are like $ 200 each. Do u know where I can get them cheap or if they can be fixed?

TexasHonda

Check ebay for used or new at much lower cost. I have installed both used and aftermarket, and all worked well.

The universal O2 sensors are the lowest cost, but will require splicing the wires from old harness to new sensor wires. Not hard, but does require crimping tool and care to get right wires matched. Most sensors provide guidance to wiring.

I would also suggest checking your wiring harness to make sure you don't have damaged wiring. Unlikely for both to be damaged, but also unlikely for both to fail at same time. You might also check your alternator's output voltage. Excess voltage might burn them out.

good luck

tmnhs81

How about I get you a price quote from my sources tomorrow as I'll be working all day today and won't be back untill midnight..

EDIT: Listen to TexasHonda.. He's the TL tech....great info TH...

Yoyon

Thanks for the info, I'll check that out

Yoyon

Thanks I'll appreciate that, you are in the bay area right?

Yoyon

You think this will fit:

http://www.autopartswarehouse.com/sk...%26+Drivetrain

It says front or rear, I saw some wih2 and 4 cables, do u know which one I need?

Thanks

main70072

Check out http://www.rockauto.com/ or http://www.sparkplugs.com/

If you decide to go with the universal sensors, they are cheaper but require splicing of the wires like others have mentioned above. The OE identical sensors are direct plug in. I would recommend getting NGK or Denso.

TexasHonda

Yes, it will fit either front or rear.

good luck

Yoyon

Just one Question I am a Noob in this, where are the sensors located?

There is one before and one after the Cat. right?

TexasHonda

Primary is on the exhaust manifold underneath the battery. Secondary is aft of the catalytic converter. Check autozone for online manual help.

good luck

utterman

I just replaced both oxygen sensors for my 98 Acura TL 2.5.

I got my oxygen senors from http://www.oxygensensors.com. I was cheap and got the ones that needed to be spliced. They use crimped connectors and heat shrink around the connections.

Pre-cat sensor
-The sensor is located between the battery heat shield and under the engine at the exhaust manifold
-I had to remove my battery and the heat shield to get to the senor
-Get a Oxygen sensor socket at a place like Autozone. I was able to "rent" the tool by paying ~$25 and getting a full refund when I return the socket set. The socket is required because it as a gap to allow the wires to pass through so you can reach the bolt that goes around the sensor
-I used my breaker bar and was able to loosen the sensor
-The wires to the sensor travel down to be right behind the passenger tire/under the passenger door
-I removed the connector from the old senor and used it on the new one
-Installation is the reverse order

Post-Cat sensor
-The sensor is location around mid-section of the car after the cat
-There is a heat shield around the converter that I wasn't able to remove because the four bolts were rusted. You need to take off the heat shield to get to the sensor.
-I took it to Midas and for ~$34 they took off the heat shield
-Take the sensor off using a breaker bar and the oxygen senor socket
-The wires go up to the interior of the car and connect right under the passenger seat

Leuth

I just bought a 96 Acura TL 3.2 "Premium" with 236k miles on it for a whopping $1600. Once I got the car home, I plugged in my ODB2 machine and it popped up with the P0141 code. Thankfully, that was it.

So, 02 Heater circuit (bank 1 sensor 2). However, my sensor gives me real time data. All three 02 sensors were constantly in the .7## to .8## range. So is there really a malfunction in the 02 sensor or is it possibly something else entirely?

TexasHonda

O2 heater causes sensor to warm fast and respond to fuel/air mix earlier and more accurately during warmup. Sensor may be fine, but CEL is set because the electrical heating element is either shorted or open, most likely open.

Check heating element w/ VOM. It should have 10-15 ohms? (check your manual spec).

good luck

Leuth

VOM = Volt/Ohm Meter... right?

...and where's the heating element?

MarcDavidoff

I figured I would just throw this out there as an fyi.. I had both codes as well on my '96 2.5TL. Both sensors where reading infinite ohms. I happened to have two OEM used sensor from a '93 accord. Unfortunately, although the plugs are the same, the wires are too short from the accord so I had to cut and butt splice them together. Working fine and no CEL. I fgured it was worth a shot over buying new ones

TexasHonda

Yes, volt-ohm meter.

Heating element is in the O2 sensor, and energized by two wires (usually gray or black) to O2 sensor. Check them for resistance at the connector.

good luck

Leuth

Um.
Where? XD

I'll ask the guy at the shop tomorrow. :p