I cant get rid of engine light with O2 sensor codes. Replaced both sensors with Honda parts and still get engine light. Read article that says there is a software update for the PCM. Honda dealer says he never heard of it and could not find any info on that idea. Do I just get a different PCM from a salvage yard and see if that fixes it or can you verify a software update for this problem?????
Honda Q&AAsk Your Question
2004 Honda Civic Question: Article says there is a software update for PCM in a 2004 Honda Civic.
Answer #1gmc4me January 10, 2013, 17:54Journeyman
At times a car line will release what is called a Technical Service Bulletin (T.S.B.) to dealerships that service advisor, service managers, and technician don't know about since there are so many. So there may be a T.S.B. regaurding the problem.
Answer #2ziptie12 January 10, 2013, 18:22Master
post your complete vin# and I can check.Honda techs DO have access to checking VIN status. If you post SPECIFIC DTC I can also check for any service bulletins related to it.....Curious Question , what was the source of the article you read? The other reason they might have said there is no update , is that your car might already have the 'updated' version or the tool they use for updates did not have the appropriate software version itself, which in turn , would say that your vehicle did not have an update available.
Replyscrewcrew, January 10, 2013, 18:30Rookie
Cant seem to locate a T.S.B. for this problem..your help is really appreciated cuz the dealers seem to be clueless. VIN = 2HGES26774H532171. Maybe not an article...it was a posting on Repairpal for this problem. I googled this and Repairpal had some info saying their was a software update...not sure of who posted or the accuracy of the info...just want to run out all leads before I pull PCM and buy a salvage PCM. I am going to chec for any signs of water damage to PCM tomorrow...dealer service said the drain line for evaporator has been know to plug and drip water on PCM...gonna look tommorrow. :/ Not sure what you mean my DTC?
Replyziptie12, January 10, 2013, 18:45Master
According to VIN status your last name starts with BE , if correct , it shows no RECALLS (not the same as service bulletins).For some reason The service bulletins won't come up , but if you know the specific trouble code(s) and post , I can check tomorrow at work. (DTC= Diagnostic Trouble Code)
Replyscrewcrew, January 10, 2013, 20:30Rookie
I believe the codes were p0135 and p0141. The codes correspond to the two O2 sensors on the civic. I am going to scan it again tomorrow and verify these codes. I will also pull the PCM and look at it for the reference number I need to replace it.
Replyziptie12, January 10, 2013, 20:39Master
Don't waste money on an unneeded PCM. IF you change it , you will need to program the immobilizer system to it. Most likely meaning a tow bill to dealership and leaving the original PCM in it for the process. Let me check tomorrow to see what other diagnostics they recommend , before spending more money. The car is running , right?
Replyscrewcrew, January 10, 2013, 20:45Rookie
Yes...just need to get rid of the light so I can get my inspection sticker for the year. I would swap out the PCM at the dealership for the programming. Do not want to do that if there is another answer to this nightmare. Appreciate it ...I like this site!!!
Replyziptie12, January 11, 2013, 20:19Master
///////////////........FOUND IT........P0139(SECONDARY HEATED OXYGEN SENSOR (SENSOR 2) SLOW RESPONSE. SERVICE BULLETIN 07-019. ---"Probable cause is the ECM/PCM misinterprets the secondary heated oxygen sensor output and sets DTC P0139" CORRECTION- UPDATE PGM-FI (PCM). IF THE DEALER HAS ALREADY CHECKED YOUR CAR PROPERLY WITH THEIR SCANNER , AND THEY STILL SAY 'NO UPDATE NEEDED' , THEN REPLY ON THIS POST. BE SURE TO REFERENCE THE SB#07-019. IT IS NOT CONSIDERED WARRANTY. NORMAL CHARGE SHOULD BE .3-.5 Hr LABOR. ALSO BE SURE TO PUT SOME MILES ON CAR(ASSUMING THIS IS FOR EMISSIONS INSPECTION) SO ALL THE REQUIRED READINESS MONITORS WILL 'SET'. GOOD LUCK.