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Check engine light is on. my OBDII will not diagnose.
Check engine light is on. my OBDII will not diagnose. AutoZone gives 4 possiblities-O2 sensor or cat converter … read more
HDGENE
HDGENE
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2004 Toyota sienna xle got a code p0420, read a lot of
2004 Toyota sienna xle got a code p0420 , read a lot of information stating o2 sensors need replacement, any idea which o2 and if that will solve issue of cel. thank you… read more
Randall C
Randall C
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Vocational, Technical or Trade Scho
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Toyota corolla 1.6 2003 hatchback: Hi, My daughter has a 2003
Hi, My daughter has a 2003 Toyota Corolla 1.6 Hatchback. Model ZZe121L-DWMDKW. ECU 3ZZ-FE. MIL light went on. Garage switched it off and told her there were pending codes. CAT and ECU replacement need… read more
Randall C
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Toyota RAV4: I have a 2002 Toyota RAV 4 with 120,000 miles,
I have a 2002 Toyota RAV 4 with 120,000 miles, and it is registering the P0420 and P0430 codes. Is this for sure the catalytic converter or could it be something else such as the 02 sensors, MAF? It d… read more
Skyvisions
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2006 Toyota Sienna Limited: Check engine light..Trac Off light came on
2006 Toyota Sienna Limited Van: Check engine light, VSC, & Trac Off light came on. This also cancels my lazer cruise control and shows E3 Code on the lazer cruise control. Annalyzer showed Bank 2 cata… read more
Genchi Genbutsu
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2001 Toyota Sienna CE: chain..Check engine light comes..o2 sensors
So I've got another issue I could use your input on. I think it's best explained by chain of events (2001 Toyota Sienna CE): 1. Check engine light comes on 2 months ago, checked the computer with a ha… read more
lexpert
lexpert
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Vocational, Technical or Trade Scho
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My 2001 Toyota Sienna has a MIL code P0420. Have ScanTool readouts
My 2001 Toyota Sienna has a MIL code P0420. Have ScanTool readouts available. I understand Toyota admits a mfg defect in 2001-03 Sienna ECMs (computer) that causes a false P0420 MIL. How can I tell fo… read more
kalamykid
kalamykid
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01 Tacoma: cyl..w/ p0420 cat eff below thold bank 1 code.
'01 Tacoma 6 cyl. w/ P0420 cat eff below t'hold bank 1 code. removed, came back 2 days later . Had o2 sensor aft. cat. replaced 1 year ago. Truck runs good. Both cats and both sensor wires look ok, no… read more
Amedee
Amedee
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The Check Engine light came..Heater Control..Control Circuit
The Check Engine light came on a few days ago, and the code that it generated was P0057, HO2S Heater Control Circuit Low Bank 2, Sensor 2. What am I in for to repair this?… read more
jazzmaster
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2003 Toyota Sienna CE: check engine..catalytic converter..My mechanic
I have a 2003 Toyota Sienna CE and am getting a P0420 check engine code. How can I tell whether it's a faulty O2 sensor or a faulty catalytic converter and in either case which particular O2 sensor or… read more
JOHN aka Eauto
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self employed
High School or GED
10,913 satisfied customers
2001 Toyota sienna ce: Trouble codes p0420..heated circuit
I have a 2001 Toyota sienna ce with the check eng. light on. Trouble codes p0420/ catalyst efficiency below threshold, and p1135/ air/ fuel sensor heated circuit response (bank1 sensor 1). did trouble… read more
lexpert
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Vocational, Technical or Trade Scho
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local mechanic..my old catalytic converter..check engine light..p0420
I had a couple of months ago went to a local mechanic to have my old catalytic converter replaced with a newer one (Magnaflo) when the check engine light had come on. They did a diagnostic test and th… read more
George H.
George H.
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Associate Degree
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Below threshold..start looking..the EVAP, and what about the P0430
I have a 3 EVAP codes P2401, 2402, 2419 reading and a P0430 Cat Eff below threshold bank 2. Where is the best place to start looking for the fix on the EVAP, and what about the P0430?… read more
lexpert
lexpert
Technician
Vocational, Technical or Trade Scho
2,100 satisfied customers
Tacoma: 000 miles..First code was P0136 O2 sensor,changed..P0420
@001 Tacoma, 2.7, auto, 145,000 miles. First code was P0136 O2 sensor,changed. Then P0420, cat. effic. below threshold. Cats replaced. Still had code P0420. Then the MAF sensor was changed. Still have… read more
Skyvisions
Skyvisions
ASE Certified Technician
High School or GED
13,102 satisfied customers
2004 toyota corolla: the check engine light was..O2 sensor
Bought a 2004 toyota corolla. the check engine light was on, but down stream O2 sensor was broken. the code confrimed there was a problem with it. Replaced with a bosch and now has 0420 code. replace … read more
Skyvisions
Skyvisions
ASE Certified Technician
High School or GED
13,102 satisfied customers
1998 Toyota Corolla: check engine light..p0420..problem please
the check engine light is on on my 1998 Toyota Corolla and the code reading is p0420 I have no idea what this means this is my first car I've only had it 2 months and I'm worried that this is going to… read more
Lamp
Lamp
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Vocational, Technical or Trade Scho
114 satisfied customers
corolla: I troubleshoot the downstream o2 sensor..my 2003
How can I troubleshoot the downstream O2 sensor on my corolla. I have a single code of P0430 on my 2003 CE… read more
Skyvisions
Skyvisions
ASE Certified Technician
High School or GED
13,102 satisfied customers
2001 Toyota Sienna: van..dealership..oxygen sensors..Bank 2 Sensor
Hello, We have a 2001 Toyota Sienna van with a check egine light, I have scan and came up with the code P1175. The dealership came up with the oxygen sensors on Bank 1 Sensor 1 and Bank 2 Sensor 1. I … read more
Virtual Wrench
Virtual Wrench
Owner of LJ Auto Repair 37 years
Associate Degree
14,398 satisfied customers
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