Oxygen Sensor survey (1 Viewer)

[boombapslappy]

2000 with 96k
CEL came on Wed. and I pulled the code yesterday. 155 bank 2 sensor 1 Ordered denso from sparkplugs.com

Not looking forward to replacing either sensor 2. Looks like a b***h of a job.

 

[mmaakk]

I just replaced front left side at 185K miles; piece of cake to replace and all you really need is a 22mm open wrench; If you can change a spark plug you can do this.

 

[Bigtex]

Replaced a front sensor around 135k and a rear at around 190k, but I was feeling really lazy and had my mechanic do both so I don't remember which sides they were on.

 

[Skidoo]

I see
Denso automotive parts available online at DensoProducts.com (sparkplugs.com)
Has a sale going on front sensors for $66.58 each.
Paid almost $90 each when I replaced mine at 135K miles.

 

[hoser]

I paid even more when I bought through my friendly Toyota dealership.

$57.19 and free shipping on Amazon... Denso is the OE supplier for Toyota.

Amazon.com: Denso 234-4169 Oxygen Sensor: Automotive

 

[rockclmbr]

P0135

CEL came on twice in the past 2 weeks. I cleared it both times and it took a few trips to pop back on. I have 148k miles on a 2000. It is Bank 1 Sensor 1, hopefully just replacing the O2 sensor will fix it. I noticed mileage dropping about 1mpg in the last two trips, but not significant.

 

[Letsgomoreplaces]

150k miles

Just turned 150k miles and got this one today:

DTC P0155 Bank 2 Sensor 1 = Passenger side/ Right side front sensor

 

[ljlc]

The poll is closed but I replace driver's side front at about !75k miles. It set off the CEL about 10 miles after I put a bottle of Techron cleaner in the gas tank. Coincidence, I don't know. I am told that the cleaner may have dislodged something that then got stuck on the O2 Sensor, I am not buying that one. Nonetheless, bought a new sensor and a 22 mm crow's foot and about an hour later, the job was done and the CEL was off. The toughest part was getting the connector loose. I ended up zip tying the new wires up and out of the way rather than use the mounting bracket that is on the truck. Easy job, lots of room to work. The only issue was trying to get my hands up and on the plug to get it released. find somebody with skinny small hands and make sure the engine is cool. Phil

 

[rockclmbr]

When my O2 Sensor went kaput, I noticed my mileage dropping to around 11-12mpg (from 13-14). After replacing the sensor with a new one I got approx. 9mpg! Hopefully this is due to the fact that the computer has to relearn everything.

 

[2000UZJ]

Just replaced mine sunday night, extremely easy (front passenger, right by the manifold). took about 15 minutes 1st time around.

Mileage was 14-16 city at the time and dropped to 10-12 after replacement. I hope it goes back up.

Whats the going price for a denso O2 sesnor? cheapest I could find was 155. I got a Bosch for $91 and came with 1 year warranty.

 

[NMuzj100]

Wouldn't surprise me if the computer added more fuel to burn cleaner. Gas mileage and CO2 were not a big consideration when these were designed.

 

[erupert66]

Replaced the following -

DTC P0155 Bank 2 Sensor 1 = Passenger side/ Right side front sensor - About 160K
DTC P0135 Bank 1 Sensor 1 = Drivers side/ Left side (USA) front sensor - Today - 190K

 

[hoch]

P0155 - Replaced at 112k miles
Just got a P0135 at 136k miles. Will be replaced this week.

If anyone's looking for Denso sensors, Amazon seems to have the best price. Part 234-4169 (Front) for ~$56/each.

 

[pfran42]

DTC P0135 Bank 1 Sensor 1 = Drivers side/ Left side (USA) front sensor at 140K.

 

[hifu]

Bought my 1st LC, a 2000, this past summer and did not get 2 miles off the lot b4 I got CEL. When I got back home sure nuff had a bad sensor. I noticed on the trip home also my gas mileage was really poor. Bank2 sensor1 was the culprit so I changed out both front sensors. Gas mileage did get better........

 

[JamesInLV]

I've got a '99 LC with 184k miles. Haven't replaced any of my O2 sensors, but mileage seems to have been drifting downward (from a consistent average of 15 to close to 13 today). When I run 91+ octane fuel, my mileage drops to more like 11mpg, and I've been running 89 octane most of the time because that's what it seems to run best on.

Should I be looking at the upstream sensors to get better mileage (assuming I've done most other things that might affect it) or just wait until I get a CEL code? Fortunately the only code this truck has EVER thrown was for an ignition coil.

 

[OregonLC]

I just started to get the same thing. Consistent 15 ish for a year on 35's and 92. Then I thought I'd try 87 to see if it really made a difference. Mileage went to 10/11. At first I attributed it to wheeling. But then switched back to 92 and put three tanks through on the hwy only to see 13 at 70 mph. Last night I disconnected the batt so we'll see if a reset gets things back in line. If not, I'm suspecting either O2 or a coil pack.

 

[BrettinSanAntonio]

108K. No replacements yet.

 

[no-pistons]

Now they're only $50 with free shipping at Amazon

 

[JamesInLV]

I just started to get the same thing. Consistent 15 ish for a year on 35's and 92. Then I thought I'd try 87 to see if it really made a difference. Mileage went to 10/11. At first I attributed it to wheeling. But then switched back to 92 and put three tanks through on the hwy only to see 13 at 70 mph. Last night I disconnected the batt so we'll see if a reset gets things back in line. If not, I'm suspecting either O2 or a coil pack.

In general my experience with mileage is the opposite. For 9 years I lived in Vegas which is relatively higher altitude (2-3k feet) and my LC always ran best with 89 octane. Now I'm at sea level, 89 octane still seems the best, but what was surprising is trying a full 91 octane tank of Shell gas, seeing my mileage drop from ~14mpg consistently to what is probably running closer to 11mpg. That's over a 20% drop!

For any opinions that O2 sensors just go bad over time, even without throwing a code, I find other opinions that say just wait until they actually go bad for real. But at this rate I could save the cost of O2 sensors in gas in just a couple months if I consistently got back a little mpg. Heck, the wasted gas in this tank alone at this rate will be $20.