Question about 2001 Honda Accord

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Problema con el codigo p0420

Motor 2.3lt ulev v-tec

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P0420 - Catalyst System Low Efficiency

Posted on Oct 29, 2008

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What is a AF Sensor on a 2008 Honda odyssey ?

AIR/FUEL Ratio Sensor is just another name for oxygen sensor and is common for ULEV emission. and is twice the price of O2 sensor,Sadly the regular won't work and you will lose money if you go different rout.Buy the right sensor the first time and you will be good for a long time. Honda uses DENSO and is the one your computer will read the best.
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What is a v tec solenoid

Hi ,V TEC is a motor type used in Honda model cars,the solenoid is on the side of your starter motor and it causes the start gear to push out and line up to the main flywheel to turn your engine over ,the solenoid can sometimes repeatedly "click" when it malfunctions ,this can be very intermittant and embarrassing to say the least. when it starts doing this i strongly suggest you simply get the model engine it has (from the ID plate under the bonnet ) and phone your closest Honda car dismantler or wrecker or junkyard and ask them for a replacement starter motor,they dont sell solenoids seperately unless you buy brand new which may be an extreme price.the second hand starter motor will usually come with a 3 month warranty and are not too expensive.Have it fitted by an auto electrician or a good mechanic and you'll be fine .THANK YOU for using FixYa

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Check engine light is on took to auto zone they gave me a code that said P1166

Hello there:
P1167 and P1166 codes relate to the primary O2 sensor heater malfunction.
there are two different O2 sensors, a "universal" sensor from Autozone and a supposedly OEM sensor from O'Reilly's. Both of them may cause the car to throw a p1166 or P1167 code and run rough. so i highly recommend getting a O2 sensor from Honda, and this will fix the problem .
It turns out that none of the aftermarket probes from Bosch or Denso will work on a ULEV (F23A4) 4 cyl. engine. Honda had different part number probes for the normal VTEC 4 cyl. and the ULEV Vtec engine and the probes look different and have different length cables. The computers at O'Reilly's, Autozone, or NAPA made no distinction between these two engine types.

Dec 27, 2010 | 2003 Honda CR-V

1 Answer

Mauricio Vasquez

Here are some possible causes.

Air leaks at the exhaust manifold or in the exhaust pipes.
Catalytic converter damaged or has failed (deteriorated).
Front O2 Sensor older (aged) than the rear O2 Sensor (O2 is lazy).
Front O2 or rear O2 is contaminated with fuel or moisture.

Jul 18, 2008 | 2001 Honda Accord

4 Answers

92 honda civic wire 4 vtec

hi, i am sorry to tell you that your motor can't support v tec , and i advise you not to try , and thank you for using fixya

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