2002 Civic SI P0134 P0420 codes The engine light is on and I scanned both the P0134 P0420 codes. Under P0134 the scanner reads: 'O2 sensor circuit no activity detected Bank 1 Sensor 1. Is most likely a sensor issue or a catalytic converter issue? Thanks |
Re: 2002 Civic SI P0134 P0420 codes
Originally Posted by Philip54
(Post 4733281)
The engine light is on and I scanned both the P0134 P0420 codes. Under P0134 the scanner reads: 'O2 sensor circuit no activity detected Bank 1 Sensor 1. Is most likely a sensor issue or a catalytic converter issue? https://www.autocodes.com/p0134_honda.html Check for manifold and other exhaust leaks. Any idle or performance issue? |
Re: 2002 Civic SI P0134 P0420 codes Fix the O2 sensor code first. Then drive it and see if the cat code returns, and deal with it then. |
Re: 2002 Civic SI P0134 P0420 codes
Originally Posted by Megalodong
(Post 4733282)
https://www.obd-codes.com/p0420 https://www.autocodes.com/p0134_honda.html Check for manifold and other exhaust leaks. Any idle or performance issue? |
Re: 2002 Civic SI P0134 P0420 codes
Originally Posted by ezone
(Post 4733286)
Fix the O2 sensor code first. Then drive it and see if the cat code returns, and deal with it then. |
Re: 2002 Civic SI P0134 P0420 codes Both my sensors and catalytic converters are relatively low time It's set fault codes now. Find and fix code P0134 first. (It may or may not be a failed O2 sensor, but it's usually a failed O2 sensor) |
Re: 2002 Civic SI P0134 P0420 codes
Originally Posted by ezone
(Post 4733294)
Doesn't matter. It's set fault codes now. Find and fix code P0134 first. (It may or may not be a failed O2 sensor, but it's usually a failed O2 sensor) Thanks. We'll try the sensor first. |
Re: 2002 Civic SI P0134 P0420 codes If you are going to replace it, get a DENSO or NTK sensor. Whichever brand the factory installed....I think it was denso but not positive. |
Re: 2002 Civic SI P0134 P0420 codes For 02 Si with K20 engine....It's an A/F sensor, not a regular oxygen sensor. OEM was indeed Denso. HONDA part # 36531-PND-A11 DENSO website, look up your own part#: http://densoautoparts.com/find-my-part.aspx Denso # 234-9004 ....now search for that at your local parts stores or online? |
Re: 2002 Civic SI P0134 P0420 codes
Originally Posted by ezone
(Post 4733308)
For 02 Si with K20 engine....It's an A/F sensor, not a regular oxygen sensor. OEM was indeed Denso. HONDA part # 36531-PND-A11 DENSO website, look up your own part#: http://densoautoparts.com/find-my-part.aspx Denso # 234-9004 ....now search for that at your local parts stores or online? |
Re: 2002 Civic SI P0134 P0420 codes I replaced the A/F sensor with a new Denso sensor. The engine light stayed off for about 1,500 miles, but now it is back on. Is there any way that the new Denso sensor can be tested out of the car? Also, assuming that the sensor is good, what should be the next step to troubleshoot the engine light on (the error is still the same: P042). Thanks |
Re: 2002 Civic SI P0134 P0420 codes
Originally Posted by Philip54
(Post 4736344)
I replaced the A/F sensor with a new Denso sensor. The engine light stayed off for about 1,500 miles, but now it is back on. Is there any way that the new Denso sensor can be tested out of the car? Also, assuming that the sensor is good, what should be the next step to troubleshoot the engine light on (the error is still the same: P042). Thanks
Originally Posted by ezone
(Post 4733286)
Fix the O2 sensor code first. Then drive it and see if the cat code returns, and deal with it then. Probably needs a cat. If it doesn't have to pass an emissions test anytime soon, I might erase the cat code and then see how long (miles) it takes to reset it. PS, in your first post you listed both codes were found......That means it already had set the cat code before it set the sensor code. |
Re: 2002 Civic SI P0134 P0420 codes Yes, only one code this time. I also think that a new cat may be needed. But the strange thing is that the people that replaced the AF sensor said that the sensor was shot (it was not providing heat, perhaps the wires that provide the heat were broken). That is why I would be interested in removing the sensor and test it, if that is possible). Also, is there any risk of damaging the engine driving the car with the light on for a while? Thanks |
Re: 2002 Civic SI P0134 P0420 codes (it was not providing heat, perhaps the Google search P0134, read the DEFINITION of that code..... that tells you how the sensor failed. That is why I would be interested in removing the sensor and test it, if that is possible) It's working fine according to the computer. DFWI I hope you meant checking the old bad failed AF sensor. Forget it. You can't check for P0134 off the car. If you had a P0135 code you could check heater circuit resistance off the car, that's about all you can check. |
Re: 2002 Civic SI P0134 P0420 codes
Originally Posted by ezone
(Post 4736377)
No. Google search P0134, read the DEFINITION of that code..... that tells you how the sensor failed. You want to pull out the brand new working AF sensor? NO!!!! It's working fine according to the computer. DFWI I hope you meant checking the old bad failed AF sensor. Forget it. You can't check for P0134 off the car. If you had a P0135 code you could check heater circuit resistance off the car, that's about all you can check. |
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