So I keep getting code 43. Replaced o2 sensor, came back, replaced it with another new o2 sensor, still coming on. Denso O2 sensor btw. I've also replaced the fuel strainer and fuel filter and ran multiple cans of fuel system cleaner through the car in the last few thousand miles. Is there anything else you guys would suggest I try?
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i will start with the most common: have you reset the ecu? pull the neg batt cable off and pull the hazard fuse and wait for 10 min.
if you have done that try replacing your fuel pressure regulator on the fuel rail -
Check the wiring to the sensor, as well as the wiring to all electrical fuel components. Code 43 is USUALLY an o2 sensor code, but occasionally it does indicate a problem with the fuel system itself (I've only seen one confirmed instance of that on here, but one is enough.)
Also, if you can get your hands on another ECU to try, do that. It's not likely, but it's possible that the ECU itself may be malfunctioning.
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alright I will check everything and update backComment
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My money is on the fact that you need to reset the ECU.Comment
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He seems to have done a pretty thorough job of things to this point, so I would think he'd have thought to reset the ECU!
Then again, I was pulling my hair out once when my car wouldn't start... only to find that my ignition switch was unplugged!
Dumb oversights DO occur, I suppose!
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it should go off by itself, even obd2 cel will clear itself after a drive cycle/monitor completionComment
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question....
Hi there, i'm going through this right now..........
there are two 02 sensors, how do you know which one to replace? 2nd quest, does it hurt car to drive like this for a week? It does reset everytime i park, then about 20 mins into drive comes back. This has been going on for the last 2 days......... up to that point it was once in early March, and then started 2 weeks ago....Thanks!Comment
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There is only one o2 sensor.
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