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AC fail and Fuel consumption

Tiny
OASOYIN
  • MEMBER
  • 2000 TOYOTA SIENNA
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
Hi, I have 2000 Toyota Sienna, after using the AC for some minutes its cut off and never cool again till I switch it off and on it later.
I just replace the condenser and re-fill the gas. What could be the problem?

Also the car consumes fuel, what could be the cause.

Meanwhile, the AC technician ask me to change the catalyst can this be the fault?
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Friday, January 7th, 2011 AT 9:07 AM

15 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,867 POSTS
The catalytic converter would cause the engine to run poorly, loss of power, lower fuel economy. However, you will notice a power loss. As far as the AC, have him check the cycle switch.
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Wednesday, January 12th, 2011 AT 11:17 PM
Tiny
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Thanks are you of the opinion that I change the catalyst because the AC technician says this must be change for the Engine heat to reduce, so that the Ac will work.
For the loss of power I really do not notice that but the fuel consumption is very high. I finish full tank in just four days, while I don’t go more than 40mph in a day.
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Thursday, January 13th, 2011 AT 6:37 PM
Tiny
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Before replacing the converter, they can check to make sure it is bad. One thing you can do is this. Drive the vehicle, park and let it running. With the vehicle still running, in park, and the parking brake on, look at the converter. If it is plugged, often times it will get so hot it will glow red hot. Other than that, the converter should be checked for back pressure. A good mechanic (won't guess) but rather check to make sure there is a restriction in the converter before replacing it. They check the back pressure by removing the O2 sensors and checking from there.
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Thursday, January 13th, 2011 AT 6:51 PM
Tiny
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Thanks, I will have them check it before they do anything on it.
Another thing I notice now is when I put the car on Drive the car jeck forward, what can be the cause.
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Friday, January 14th, 2011 AT 11:44 AM
Tiny
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Thanks,
Another thing I notice now is when I put the car on Drive the car jeck forward, what can be the cause.
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Friday, January 14th, 2011 AT 11:48 AM
Tiny
OASOYIN
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  • 9 POSTS
Thanks,
I also notice when I put the car on drive it jeck before moving what can be the cause of this.
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Friday, January 14th, 2011 AT 2:18 PM
Tiny
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  • MECHANIC
  • 109,867 POSTS
It could be a TCC solenoid, shift solenoid, engine idle speed.
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Friday, January 14th, 2011 AT 4:05 PM
Tiny
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Pls what is the solution to this.
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Monday, January 17th, 2011 AT 7:29 AM
Tiny
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You need have the computer scanned to identify if there are codes
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Monday, January 17th, 2011 AT 3:18 PM
Tiny
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I have scan the car here are the codes I got:
p0773
p1130
p1135

what next.
Please
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Wednesday, January 19th, 2011 AT 6:11 PM
Tiny
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PO1130 Air fuel sensor circuit bank 1
Po1135 Air heater sensor circuit bank 1

You have a sensor issue involving the fuel sensor on bank 1
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Thursday, January 20th, 2011 AT 4:30 PM
Tiny
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  • 9 POSTS
Does this means I should change it or the Mechanic should check.
Please advice.
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Friday, January 21st, 2011 AT 9:52 AM
Tiny
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I would recommend a mechanic check the sensor before throwing money at it. That seems to be where the problem is coming from.
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Friday, January 21st, 2011 AT 8:12 PM
Tiny
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What are the steps to check this. I want to have an Idea so as to be on top of things when the mechanic is running the Test.

Meanwhile, the AC issue is been rectified. The Radiator was cleaned up (coolant removed and new one added, the pipe checked to detected leakages, Gas refill) and is working fine.

I will be going back for the fuel issue this weekend.I will be expecting your response on the initial questions.
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Monday, January 24th, 2011 AT 10:25 AM
Tiny
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They need to check the sensor's resistance.
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Monday, January 24th, 2011 AT 7:00 PM

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