J0hnTrevolt:
Motor gurus plz epp me oo! My car yaff started gulping fuel again ooo!
It's a Toyota avalon 2002. V6. 250K miles. The fuel consumption is now outrageous that I buy 4k fuel every day instead of normal 1k fuel usage each day.
I've scanned vehicle severally and it brought out p1135 code. I ordered the sensor from Amazon and put and the code kept showing. No improvement atoll in fuel economy. I disconnected my battery terminal and put it back no check engine lights but fuel consumption is still overboard.
Dunno what to do ooo! My car drives like jet, no issues at all just the fuel consumption.
I'm supposed to be doing 18 mpg but unfortunately I'm doing 8 mpg.
All moto gurus plz epp me ooo I lo e this car and dnt wanna sell now. Plz.
Cc radautoworks, GAZZUZZ, MotorGuru

radautoworks:


Catalytic converter messed with?

tensazangetsu20:
Fake Chinese parts are also sold on Amazon. I am sure you bought the cheapest one you could find.

Is the code still present?

J0hnTrevolt:
I doubt. If messed with, will car still be moving smoothly, soundless and no smoke becos my car drives perfectly well.

jodeci:
But some folks argued that removal of catalytic converter would improve fuel economy rather than worsen it.

seanfer:


Maybe that works for Toyota Datsun 120y 1976 model.

HeavenlyBang:

A catalytic converter doesn't affect fuel economy.

jodeci:
But some folks argued that removal of catalytic converter would improve fuel economy rather than worsen it.

HeavenlyBang:

A catalytic converter doesn't affect fuel economy.

TRYGO:
That's a huge money been spent son fuel consumption here.

Here's a brief.

That sensor, measures the volume of oxygen in the system, and converts that in some sort of voltage values for the ECU to use in order to attained a set air/fuel ratio balance. If the ECU sees less oxygen in the system from the O2S, it would command an increase in the injector pulse width(prolonged fuel supply):rich system.

...




PS: Here's an appeal to car owners with code readers.
Having a code reader read for trouble codes, does not equate to fixing a problem by replacing parts.
Code readers are there to narrow down the likely areas where you need to troubleshoot.


Hope this gives you some succour.


Regards,
Joseph

radautoworks:


They know nothing Jon Snow

thebigkendo:


They do.. Depends on the car or manufacturer.. I know for sure on the 7th gen Accord with or without catalyst.. You still get the same MPG, the only negative is if catalyst is clogged

radautoworks:



But... But.. you just disagreed and agreed in the same sentence...I wasn't specific. Just told him to check the state of it. That would tell what's up. Y'all assumed I said something else lol

J0hnTrevolt:
I doubt. If messed with, will car still be moving smoothly, soundless and no smoke becos my car drives perfectly well.

radautoworks:



But... But.. you just disagreed and agreed in the same sentence... I wasn't specific. Just told him to check the state of it. That would tell what's up. Y'all assumed I said something else lol

radautoworks:


This is the first time I've been stunned negatively by something you said...

radautoworks:


Catalytic converter messed with?

HeavenlyBang:


Except that it doesn't.

I've taken off the cats on both my Lexus ES330 and Infiniti G35 without any hit to fuel economy. I'm not just talking.

Smartchoiice:

You should be arrested for environmental irresponsibility.

HeavenlyBang:


Can't hear you over the sound of this loud catless exhaust.

radautoworks:


A very useful list of other things to trouble shoot. My money is still on cat or the air filter. I'm sure you've seen some like we have that boggle the mind. I actually think his cat has been "packed"

thebigkendo:


What I disagreed is the "Jon Snow" part..
If his catalyst is clogged he would know from the performance.. Not just fuel economy



My bet is on Sensor or electronic related... Most probably 02 sensor

TRYGO:
That's a huge money been spent son fuel consumption here.

Here's a brief.

That sensor, measures the volume of oxygen in the system, and converts that in some sort of voltage values for the ECU to use in order to attained a set air/fuel ratio balance. If the ECU sees less oxygen in the system from the O2S, it would command an increase in the injector pulse width(prolonged fuel supply):rich system.

This code tells you the ECU isn't seeing the right air/fuel ratios for it to correctly operate the car.

So replacing that sensor didn't work, because, either you got the FAKE PARTS, OR THERE'S ABSOLUTELY A SHORT OR AN OPEN CIRCUIT PROBLEM WITH THE oxygen sensor wiring harnesses to the ECU itself.

NOTE: I have had issues like this too. Only replaced that sensor with a DENSO MADE. Any other one, would trigger that code.

Asks your electrician to look at those probable causes first! At least sensor replacement has being eliminated.

Trace those wires from the sensor to the ECU. It could be that the wire from the sensor close to the exhaust manifold has chamfered, and failed.

If all the above fails, then its time to do the following:

1. There could be other things causing the fuel consumption issues, apart from the O2S.
How's your air filter quality like? Terribly dirty, or...?Have you had it replaced since you owned that car?

A clogged filter is like when one's nostrils are blocked. The volume of oxygen you inhale/exhale, becomes insufficient, and that leads to problems (heart beat increases, since it tries to supply enough oxygen to cope with the demands ).

2. Removed your spark plugs and inspect. If they are worn out, replaced them all!

3. Is/are your radiator fans connected directly with the ignition system's circuitry? Does it come on immediately the ignition is turned ON?

4. Any signs of fuel leaks on the car? Sometimes, leaks do happens, that you may not be aware of. Any petrol smell?

5. How's your cars engine temperature? Late OCI on cars would increased friction on internal engine parts, which leads to increased engine loads, and then an increased in fuel consumption.
Any problems you've observed with your accessory pulleys? Any of them sticking or making awful noises(compressor, etc).?





PS: Here's an appeal to car owners with code readers.
Having a code reader read for trouble codes, does not equate to fixing a problem by replacing parts.
Code readers are there to narrow down the likely areas where you need to troubleshoot.


Hope this gives you some succour.


Regards,
Joseph

thebigkendo:


What I disagreed is the "Jon Snow" part..
If his catalyst is clogged he would know from the performance.. Not just fuel economy



My bet is on Sensor or electronic related... Most probably 02 sensor