richcoto

Hi Guys, i have a problem with my rx8.

some time ago i have receiving the p0442 and p0443. then i got my car to the garage and i bought the solenoid (KL01-18-741) then the guys changed it. i get my car but the code p0443 is still on. the guy of the garage reset the computer and it's still giving the error, so he told me about another piece that is giving me troubles. it's like another solenoid (K5T48279). so he tried to put another one to see if it works, one from a toyota, then it worked for a ride and then the CEL shows on again.

the day after i turned on my car, went for some miles and then the car doesn't rev more than 4000. i think that this what is known as a limp mode. then my car is giving the p1688 so my mechanic says the code doesn't have to do with the others. he say it has no relation, but i'm wonder if when they changed the solenoid they connect something wrong, or this was a coincidence.

i know the code it's related with the meterin oil pump, but i want to know if the piece is near the other, or if this things has a relation.

by the way the radio of my car doesn't work since a few weeks ago. i read it could be the bose amp.

i read another post of a guy who has the same problem that i'm having right now, and he just umount the oil pump turn the switch to position zero (i don't have an idea of what this means) then mount the oil pump again and the problem was fixed.

i told this to my mechanic and he said that he's concerned about how does this sensor or whatever it's called failed and he's not convinced of doing that, so please any help ?



Original unedited:
Hi Guys, i have a problem with my rx8, some time ago i have receiving the p0442 and p0443, then i got in my car to the garage and i bought the solenoid (KL01-18-741) then the guys changed it, i get my car but the code p0443 is still on, the guy of the garage reset the computer and it's still giving the error, so he told me about another piece that is giving me troubles, it's like another solenoid (K5T48279), so he tried to put another one to see if it works, one from a toyota, then it worked for a ride and then the CEL shows on again, the day after i turned on my car, went for some miles and then the car doesn't rev more than 4000, i think that is what is knows as a limp mode, then my car is giving the p1688, so my mechanic says one code it doesn't has to do with the other, he say it has no relation, but i'm wonder if when they changed the solenoid they connect something wrong, or this was a coincidence, i know the code it's related with the meterin oil pump, but i want to know if the piece is near from the other, or if this things has a relation, by the way the radio of my car doesn't work from some weeks ago, i read it could be the bose amp, i read another post of a guy who has the same problem that i'm having right now, and he just umount the oil pump turn the switch to position zero (i don't have an idea of what this means) then mount the oil pump again and the problem was fixed, i tell this to my mechanic and he said that he's concerned about how does this sensor or whatever it's called failed and he's not convinced of doing that, so please any help ?

RIWWP

iTrader: (2)

Moving this to troubleshooting, and I edited your post so people can read it more clearly.

RIWWP

iTrader: (2)

The 3 codes are: https://www.rx8club.com/showthread.php?t=234241

P0442 EVAP system leak detected (small leak) ON 2 EVAP system ´
P0443 Purge solenoid valve circuit problem ON 2 CCM ´ (See DTC
P1688 Metering oil pump control circuit initial check problem ON 1

The first two are usually just from having a loose gas cap. If tightening it down properly doesn't solve it, then buying a new gas cap is all that was needed. It's incredibly rare to be anything else.

The 3rd is indeed the OMP. Check out this thread: https://www.rx8club.com/series-i-tech-garage-22/help-car-limp-mode-p1688-163019/

Most of the results I have found regarding this code are people posting from places where oil quality might be suspect, so it probably is just an adjustment needed. Your mechanic doesn't know what he is doing with this car.

richcoto

yes i've bought the solenoid already and he changed it, so about the P01688 let me tell you this, since i bought the car i've used 5w50 then my mechanic said that it would be ok if change it for 10w30 cuz the car isn't new anymore, so do you think, this could cause the failure ?

Do you think i need to buy another oil metering pump ?

Razz1

No that is not the cause.

Try checking the connector to the oil metering pump.

Clean it.

If still a problem then check for short or open circuit.

Also check the PCM connector, clean it.

RIWWP

iTrader: (2)

No. The weight of the oil has no bearing on this issue. If the oil itself has contributed at all, then it contributed by being overly contaminated with solid substances.

This^

Add that the OMP might need adjusting (popped up in a few threads I found)

richcoto

Sad, this weekend i have to pay taxis, so the mechanic changed the oil, and the problem is still there, when the car is cold, we turn on and go for a while and the car goes ok, but when we turn off the car and turn on again after, the codes comes on.

So the mechanic says he's not sure, it's a weird problem, then he cold the piece splashing it with water, then it turns on the car and it's ok for a seconds, so he thinks it may be the piece itself, the OMP, if takes just a seconds cuz as the oil is hot when it flows throught the piece the problem comes again.

He said he umounted the piece, and clean it well, then mount it, and the problem persists, so i'm afraid to buy this expensive reaaaaally expensive piece and the problem doesn't solve, my mechanic is afraid too to tell me to buy it and the problem persists, so he said he's going to make more tests, what he's going to try is to use a friend rx8 to umount his OMP and try it in my car to probe if it's the piece it self, but we're not sure my friend is going to accept that, so i have to wait and see what he answered.

So, Raz1 you said to Try checking the connector to the oil metering pump and clean it; are you talking to the connector of the OMP it self ? cuz my mech said he cleaned and nothing happened, and what do you mean for a short or a open circuit ? like in the harness ? do you mean they could let something wrong after they changed the solenoid ? and what about the PCM connector, the mech get the PCM out to see if something is wrong with it but it looks ok, so you mean to clean connectors of the PCM right ? is the OMP connected with cables to the PCM directly ?

I have read a lot of threads, and i couldn't find some of it where changing the OMP was a good idea, the mechanic tried the thing of switching the switch to position zero, and it doesn't work.

I appreciate for your help.

RIWWP

iTrader: (2)

Try the cycle again, only this time, when it's cold and the CEL light is NOT appearing, check to see if there is a pending code. PENDING codes do not trigger the light.

If there is no pending code until the CEL lights up, then yes, I would say that the problem is likely related to the increasing heat. However, it's possible that the code is just in PENDING status on the first cycle, with no light, and then it's confirmed in the 2nd and lights up. If this happens to be the case, then it's NOT heat related, and is electronics related.


And yes, a new OMP will be very expensive, and is very critical to the health of the engine. It's likely not the OMP though, and it's just having problems due to electronics or blockage or something. Failure is exceedingly rare.

richcoto

Hi guys, i think the problem is solved, so i'm telling you what happened in order people who have this issue in the future...

It's important to say that all this was made for my mechanic, i'm just like informing, i research, read threads, and then passed the information to him, so as some threads say this could be fix by extracting the oilpump reseting the switch, clean connectors and put the oil pump again, i tell him that and he said he did it, but i don't know for certainly if he did, but let's believe him, i read that it's important to unplugged the battery, and this is something that he never did, because he said he suppose the people say that to reset the MIL codes, so what happened was, this last friday, he unplugged the computer, to see if everything was ok, but the car still there, when he try tu turn on the car this monday, the battery was uncharged, he didn't give me a reason why.

So what he did is to call a friend of mine who has a rx8 too, then he extract the MOP and set it to my car, and test it, all good, so his conclusion so far was the MOP should be buy it and replaced, but then, when he put my MOP again, he test the car again, and till now the car is good, no limp mode, so what do you think ?

I think, maybe he never extract the MOP, and then when he changed it for my friend's MOP and get it back again, it gets fixed, and that the battery being uncharged served to reset the computer or something, but the thing is the car is good now, i have two days of driving it and so far no limp mode.