o2 sensor code
Senior Member
Joined: Sep 2015
Posts: 1,419
From: Albany/NY/USA
What was the code?
Elantra with the 4 cylinder in line engine only has bank 1
But, it has two O2 sensors. One upstream and one down stream
Which one did you replace?
Suggestion is to be a little more precise in the details.
This would help us understand your situation
And better provide you with answers.
What should you do now?
Clear code and wait to see if it comes back.
Elantra with the 4 cylinder in line engine only has bank 1
But, it has two O2 sensors. One upstream and one down stream
Which one did you replace?
Suggestion is to be a little more precise in the details.
This would help us understand your situation
And better provide you with answers.
What should you do now?
Clear code and wait to see if it comes back.
Thread Starter
|
Junior Member
Joined: Jan 2021
Posts: 2
Hello and thanks for the reply. This vehicle is a friends and i just got involved with it. Prior shops could not fix the problem and that has been over 2 years ago. I have replaced the upstream o2 sensor on the online 4 cyl engine. the code are as follows P2626 P0420 P0455 P0171 P0131. I have also sealed an exhaust leak at the muffler flange connection and replaced the MAF sensor since the owner had a new one . Reset codes and tested thermostat for proper operation. Currently running car for test cycle to complete. IS THAT 100 MILES? I'm not sure. Also inspected EVAP system and found no visible problems, also checked PCV valve and hose. DOES ANY ONE HAVE A ELECTRICAL SCHEMATIC FOR A A 2005 ELANTRA WITH 4CYL. ? WOULD APPRECIATE IT IF YOU COULD SEND IT.
Last edited by MIke Popko; Jan 26, 2021 at 09:19 AM.
Senior Member
Joined: Sep 2015
Posts: 1,419
From: Albany/NY/USA
I don't remember a 2005 Elantra having a MAF sensor??
P2626 is associated with an open circuit from the bank 1 sensor 1 (upstream) O2 sensor to the ECM
P0420 is cat efficiency is below threshold. Bank 1 sensor 2 (downstream) O2 sensor
Could be a sensor issue or bad gas issue??
P0455 is an Evap emissions large leak
P0171 is system too lean
Could also be due to O2 sensor or (sticky or clogged) fuel injector or vacuum leak
P0131 is just saying there is a faulty O2 sensor Bank 1 sensor 1 (upstream)
Common is the ones pointing at a circuit problem with upstream O2 sensor.
I don't have the schematics so could not tell you which pins to check on the ECM connector.
Looking for that open wire from O2 to ECM.
The other codes on the O2 sensor could be related.
Evap needs to have smoke test done to see where leak is coming from.
To complete readiness monitors, will need to complete drive cycles.
How to drive to complete drive cycles can be found by googling it.
Well, good luck finding the information you need
And on going ahead and troubleshoot these issues.
P2626 is associated with an open circuit from the bank 1 sensor 1 (upstream) O2 sensor to the ECM
P0420 is cat efficiency is below threshold. Bank 1 sensor 2 (downstream) O2 sensor
Could be a sensor issue or bad gas issue??
P0455 is an Evap emissions large leak
P0171 is system too lean
Could also be due to O2 sensor or (sticky or clogged) fuel injector or vacuum leak
P0131 is just saying there is a faulty O2 sensor Bank 1 sensor 1 (upstream)
Common is the ones pointing at a circuit problem with upstream O2 sensor.
I don't have the schematics so could not tell you which pins to check on the ECM connector.
Looking for that open wire from O2 to ECM.
The other codes on the O2 sensor could be related.
Evap needs to have smoke test done to see where leak is coming from.
To complete readiness monitors, will need to complete drive cycles.
How to drive to complete drive cycles can be found by googling it.
Well, good luck finding the information you need
And on going ahead and troubleshoot these issues.
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