Hi,
I am new to this forum, but I searched a lot of the Honda forums. I have an Accord 2.2 litre diesel engine from 2005. I bought it used 5 years ago. Needless to say, I had no significant problems other than an alternator failure in the first year of having it. Until last year when suddenly the motor got to limp mode and had Map sensor issues, losing power and having trouble accelerating. After getting the battery off and replacing the battery the issue went off, and could drive for quite a while until it reappeared.
But last year it was more frequent than any other time so I bought an OBD scanner from ZUS. And replaced the MAP sensor, but with no success. After going to HONDA authorised service and Honda reseller where they cleaned the intake manifold and tested the EGR valve(according to them it functioned correctly and they also made a test to see if it stays open)I started to have random engine stalls and P0193 error codes. These stalls occurred especially in the cold times (spring, fall, winter) and after having run the motor for a while, not on cold starts.
The stalls got so bad and so frequent that I replaced the fuel rail pressure sensor in February (all was good, had some 300+ km runs with it without a problem since).
In the last couple of weeks, I started having again the same error code P0193 on random occasions, under load, or just by staying at a traffic light at idle, etc. So I replaced the Fuel rail pump altogether with a new one from Bosch. I went 100+ km all good but after leaving the car for a while in a parking slot, 5hrs+, when I came back, put the ignition on and voila error code( not even started the motor) P0069, P1069, P2199, P0193. Reset the codes, started the motor and it went to limp mode with the P0069 code on. I reseated the map sensor connection then it went away. I managed to drive back home another 100+ km without any problems.
A couple of days later (as in today) in the morning got to the car put the ignition on, and the same codes as before, reset, limp mode sustained and P0069, P1069 remained. And tried to reset it but it remained. Went to a service to replace the (fuel relief valve) cuz that was the next best thing to do but the service was not open, so I got back with no error.
Will do the test for the valve today and get back to you.
P.S.: could it be that these errors are from a faulty alternator? From when I replaced it, the voltage never got higher than 13.7 volts. Should I also check the alternator?
The fuel filter was changed in February. Also the air filter.
Any other suggestion after checking the Fuel relief valve? What can I do to get the car to be more reliable?
Thanks,
Alex.