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I have been getting a faulty downstream oxygen sensor code.
I have been getting a faulty downstream oxygen sensor code. My 2009 1.8l 2 wheel manual car has 140,000 miles on it. I did get the code that said my PCM/ECU was not performing optimally just once. Not… read more
Ted Ritter
Ted Ritter
High School or GED
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Car's engine was idling rough, slightly jerking the car back
Hello. Car's engine was idling rough, slightly jerking the car back and forth. Check engine light would blink on and off. At highway speed, didn't notice much of an issue. 25-30 mph occasionally a cou… read more
Ted Ritter
Ted Ritter
High School or GED
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2004: 2014 Highlander, check engine light and vsc light came
2014 Highlander, check engine light and vsc light came on then went off. Repeated a couple times, then stayed on. Checked codes and PO430 came back. Catalytic converter and O2 sensor replaced about a … read more
Ted Ritter
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xB: Hello, I have a 2006 Scion xB with 180,000 miles. Recently
Hello, I have a 2006 Scion xB with 180,000 miles. Recently I replaced two coils and all the spark plugs. The very next day the CEL came on and was showing a PO420 bank 1 code. Could this be from defec… read more
Ted Ritter
Ted Ritter
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Toyota Rav 4: I have 2002 Rav4. Yesterday on the way home during
I have 2002 Rav4. Yesterday on the way home during a 50 mile trip it indicated a check engine light. I have a code reader and it said P0420 and P0430. I was going to take it to a shop this morning but… read more
Skyvisions
Skyvisions
ASE Certified Technician
High School or GED
13,102 satisfied customers
Toyota Sienna: I am replaced the rear downstream O2 sensor
I am replaced the rear downstream O2 sensor on a 2005 Toyota Sienna because iI got a P0430 code when I used the scanner from Autozone. Everything seems to be installed correctly, but the Check Engine,… read more
Skyvisions
Skyvisions
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Toyota landcruiser I own a V8 Petrol Toyota Landcruiser 100
I own a V8 Petrol Toyota Landcruiser 100 series (2006 Model). I have fitted an after market exhaust system which includes high flow catalytic converters, for the last year i have had a engine check li… read more
lexpert
lexpert
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Vocational, Technical or Trade Scho
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97 avalon: catalytic converter..that my check engine light..toyota
I have a 97 avalon --i had a after market catalytic converter put on 3/11 after that my check engine light started coming on with the code 0420 . Is the only solution replacing with a toyota catalytic… read more
George H.
George H.
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2002 toyota sienna: replace ECM, one..Catalytic..o2 sensor..drove
Hi, I'm getting P0420 on my 2002 toyota sienna, one dealer said replace ECM, one said replace both Catalytic convertors. 2 months back my rear o2 sensor had come off the line, drove in that condition … read more
Dave Nova
Dave Nova
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I have a 2003 Toyota Sienna, with code PO420 bank 1- mil, and
I have a 2003 Toyota Sienna, with code PO420 bank 1- mil, and flashing ES, bank 2 is pending- with ES flashing. Pack rats chewed wires, but the van has 122,000 miles so we have replaced most everythin… read more
Skyvisions
Skyvisions
ASE Certified Technician
High School or GED
13,102 satisfied customers
2001 Sienna: 24-25 mpg highway at 65 mph..O2 sensor..bolts
2001 Sienna, 119K miles, runs very nicely, gets 24-25 mpg highway at 65 mph. I recently replaced the downstream O2 sensor for a verified open heater, using a Bosch adapted unit (correct plug and gromm… read more
Dan
Dan
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Vocational, Technical or Trade Scho
23,947 satisfied customers
2002 toyota rav4: ecm reflashed..check engine light..rough shifting/
I have a 2002 Toyota Rav 4. I had the ECM reflashed in 2006 when there was a TSB for the check engine light and some codes. That fixed the light. In 2008 (~90K) I had rough shifting/ jerking/ hesitati… read more
Skyvisions
Skyvisions
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High School or GED
13,102 satisfied customers
2001 Toyota Avalon: Who manufactures the bank one catalytic converter
Who manufactures the bank one catalytic converter for the 2001 Toyota Avalon? Will the Catco Pre-cat 2200 work?… read more
Skyvisions
Skyvisions
ASE Certified Technician
High School or GED
13,102 satisfied customers
2001 Toyota Sienna XLE: 000 miles..lights (check engine, trac, etc)
Have a 2001 Toyota Sienna XLE with 181,000 miles. Started having touble with lights (check engine, trac, etc). Stored code of PO174. Mechanics did not find anything. Next week code PO420 and had the r… read more
Amedee
Amedee
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Vocational, Technical or Trade Scho
1,245 satisfied customers
98 Toyota Tacoma: check engine light..engine light came..P0420
I have a 98 Toyota Tacoma and check engine light came on while I was driving I had it checked and gave me P0420 code how can I repair this?… read more
Eric
Eric
Retired
N/A
33,941 satisfied customers
2003 corolla: mechanic says..tune..an aftermarket catalytic converter
My mechanic says that the "check engine" light on my 2003 corolla is due to a bad catalytic converter. He recommends replacing both O2 sensors, do a tune up on the engine and use an aftermarket cataly… read more
Alan
Alan
Technician
High School or GED
279 satisfied customers
2002 rav4: light came..My mechanic found carbon..spark plugs
Re: 2002 RAV4L: My 'check engine' light came on. My mechanic found carbon between spark plugs and engine. Three days later, the light came on again. The diagnosis was '0420-catalytic converter efficie… read more
Boxer54
Boxer54
Line Technician
2 years university - did not gradua
1,544 satisfied customers
2001 Corolla: check engine light..O2 sensor..catalytic converter
2001 Corolla (150k miles) with check engine light, OBD II Scanner shows code 0420 (catalyitc converter efficiency below threshold bank1). We have first replaced down stream O2 sensor, still have same … read more
Amedee
Amedee
Toyota Technician
Vocational, Technical or Trade Scho
1,245 satisfied customers
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