Question about 2003 Honda Accord
Showing- sensor heater circuit bank 1 sensor! Part stores are saying it's the upstream sensor but haynes book says otherwise, downstream sensor; which is the one after the cat! My thought is, on 4 cylender models all sensors will say bank 1; cause it only has one bank! Would be different for V6 models since it comes w/two banks! So, do i change the upstream (before cat) or the downstream (after cat) O2 sensor? Remember getting PO141 code!
Both o2 sensors have been replaced with Bosch sensors and now get P0141 code. What next?? Thanks!
Posted on Aug 22, 2009
Posted on Jun 22, 2009
Testimonial: "Thanks! I figured out po141 is the sensor that goes into the cat after studying few books and trial and error. Part store gave me the wrong info 1st. "
I spoke to a honda tech , and he confirmed code p0141 on the 4cylinder model is the second sensor.
Posted on Aug 28, 2009
Circuit bank,,,, #1 sensor... this is the one before the cat.
Tech note replace both if one is bad the other is just as used.
Posted on Jun 25, 2009
In this case to be honest,I'd replace both. For at the most $60 a piece,just replace them. Use Bosch if available.
Posted on Jun 22, 2009
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
Here's a link to this great service
Posted on Jan 02, 2017
Tips for a great answer:
Jun 24, 2017 | Ford Cars & Trucks
Aug 05, 2015 | 2001 Ford Focus
Feb 27, 2014 | Toyota Sienna Cars & Trucks
HO2S-21 (Bank 1 Sensor 1) Heater Circuit Malfunction
HO2S heater control circuit is open or shorted to ground.
HO2S heater power circuit open between the heater and PCM.HO2S heater is damaged or has failed.PCM has failed (it controls the heater with a duty cycle signal).The sensor is on the passenger side,that is cylinder number one.
Jan 27, 2013 | 2002 Mazda Millenia
Apr 15, 2010 | 1998 Chevrolet S-10 Pickup
Dec 01, 2009 | 2000 Isuzu Rodeo
Nov 15, 2009 | 1998 Pontiac Grand Am
Jun 01, 2009 | 2003 Honda Accord
Nov 15, 2008 | 1997 Mercury Cougar XR7
Jun 09, 2008 | 1997 Pontiac Grand Am
2,282 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: