Oct 11, 2020 · Well, P0139 has come back yesterday and remained on today. Original O2 sensor replaced Dec.10/2019 - NGK P0139 code came on/went off about 8 weeks ago. P0139 came on …

Dec 17, 2020 · The code P0139 is a slow response on the secondary O2 sensor, a lot of times the heater is not working properly. It is not getting heated up enough to give a good signal.

Sep 24, 2015 · At 303k miles I had a check engine light and read code P0139: I cleared the codes, and after 3k more miles, I still had no check engine light. However, since I have >300k on the o2 sensor, I …

Oct 11, 2025 · I got a CEL on my 2009 Honda accord manual ex 2 door. About a month ago it came up and it was p0139 for the o2 sensor reading slowly. cleared it then it came back last week and now it …

Feb 24, 2025 · Detailed Description of Error P0139 OBDII error code P0139 is a generic trouble code that indicates a problem with the oxygen sensor circuit in Bank 1, Sensor 2.

Feb 21, 2021 · Hello, I have a 2013 Honda Accord EX-L 2.4 L 4 cylinder CVT with 162,000 miles on it. Recently I am getting the Check Engine/Malfunction Indicator Lamp light with the following code: …

Nov 26, 2023 · I got a CEL on my 2009 Honda accord manual ex 2 door. About a month ago it came up and it was p0139 for the o2 sensor reading slowly. cleared it then it came back last week and now it …

Apr 20, 2006 · P0139 - Oxygen Sensor Circuit Slow Response (Bank1, Sensor2) I am also having this issue. My check engine light comes on sporadically and the code P0139 has been stored in memory …

Jul 10, 2012 · I get it scanned at autozone and it comes up with code P0139 which says "Oxygen Sensor Circuit Slow Response (Bank1, Sensor2)". I search and see that this is the rear, lower o2 …

Mar 29, 2015 · Scenario: 100% city driving. CEL on for 3-4 days (P0139) CEL off for 3-4 days Been going for months, likely since late Oct.2020. Note: downstream O2 sensor replaced Dec.2019 (NGK) …