Help: P1870, P1235, P0135
Dec 15, 2008, 03:52 PM
#1
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Help: P1870, P1235, P0135
Can someone help me.
I am popping up some codes. When depress the accelerator with more than 80% thottle the car does not accelerate. The engine rev up to redline and engine light pops up. I have cleared the code many times but they keep poping up. The car runs perfectly fine when it is not at WOT.
I adjusted my wastegate back to stock but the same thing happends. The only mod i have is T1R test pipe. Could the test pipe be the whole issue?? I could take the test pipe off but it is too bloodly cold out to pull it off.
Keep in mind that this is an Evo X MR. And i live in canada. The current temp is -25C(without wind).
P1870 - Transmission slip. Is my transmission really slipping? Or is it just a side effect?
P1235 - Fuel pump out of range. Is this overboost?? I know the cold can effect the how much boost is created but is it enough to cause overboost??
P0135 - 02 sensor. Probaly from my test pipe. It has only popped up once and the other two code has popped up 3 times. I am running an antifouler on it. Any one else who have the T1R test pipe have this code???
I am popping up some codes. When depress the accelerator with more than 80% thottle the car does not accelerate. The engine rev up to redline and engine light pops up. I have cleared the code many times but they keep poping up. The car runs perfectly fine when it is not at WOT.
I adjusted my wastegate back to stock but the same thing happends. The only mod i have is T1R test pipe. Could the test pipe be the whole issue?? I could take the test pipe off but it is too bloodly cold out to pull it off.
Keep in mind that this is an Evo X MR. And i live in canada. The current temp is -25C(without wind).
P1870 - Transmission slip. Is my transmission really slipping? Or is it just a side effect?
P1235 - Fuel pump out of range. Is this overboost?? I know the cold can effect the how much boost is created but is it enough to cause overboost??
P0135 - 02 sensor. Probaly from my test pipe. It has only popped up once and the other two code has popped up 3 times. I am running an antifouler on it. Any one else who have the T1R test pipe have this code???
Dec 15, 2008, 04:14 PM
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I can only help you with the easy question, sorry, if your o2 sensor is giving you issues still, you likely need another antifouler, I am running two on top of each other with no issues. If you fix that and have no other mods, you could probably head to the Mitsu dealer and they would help under warranty...
Dec 15, 2008, 04:46 PM
#4
P1870 - Transmission slip. Is my transmission really slipping? Or is it just a side effect?
P1235 - Fuel pump out of range. Is this overboost?? I know the cold can effect the how much boost is created but is it enough to cause overboost??
P0135 - 02 sensor. Probaly from my test pipe. It has only popped up once and the other two code has popped up 3 times. I am running an antifouler on it. Any one else who have the T1R test pipe have this code???
P1235 - Fuel pump out of range. Is this overboost?? I know the cold can effect the how much boost is created but is it enough to cause overboost??
P0135 - 02 sensor. Probaly from my test pipe. It has only popped up once and the other two code has popped up 3 times. I am running an antifouler on it. Any one else who have the T1R test pipe have this code???
P1235 - I believe that's and overboost, you mess with the stock system it will trip stuff, nothing to help there, but put it back to normal and reset the computer. Check all vacum lines.
P0135 - Yes get another antifouler, or check out tougue factory 90 degree antifouler.
And about the warranty work, everything that the car is telling you, sounds like you caused it to happen. I dont see why the dealer should fix your mistakes or your desired to modify the car. Not hating just telling you what i think, good luck once again.
Dec 16, 2008, 02:57 PM
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I've seen people with P1235 errors and 2 out of 5 had to replace their MAF sensor. For some reason there seems to be a problem with the MAF on these cars....
Dec 16, 2008, 05:26 PM
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1870 and 1235 combi is very likely the airflow limiter kicking in .. I get that all the time 
1235 is MAF plausible code .. not fuel pump ..
BTW .. for JDM cars .. we can get rid of the CEL by turning off and starting the car 5 times ..
Start, idle 5s, Off .. 5 times and the CEL clears
1235 is MAF plausible code .. not fuel pump ..
BTW .. for JDM cars .. we can get rid of the CEL by turning off and starting the car 5 times ..
Start, idle 5s, Off .. 5 times and the CEL clears
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Dec 17, 2008, 06:41 AM
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P1235 is the overboosting code. I used to get this when running the tightened wastegate. You might want to check for boost leaks. You might have knocked a vacuum hose lose. Get a boost gauge if you dont have one already.
Dec 17, 2008, 07:41 AM
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Yea .. its quite confusing .. the ECU measures EVERYTHING with airflow ..
and with MRs it will throw a combination of codes that include P1870 and P1890 (which is trans slippage .. which is NOT TRUE)
MAF failure is P0102 code ..
Limiter / Overboosts are typically P1235 / P1238
And like I mentioned some time ago in a thread that was closed
(I wasn't the cause of the closure !! ) guys with MBC are going to be pissed this winter because they are going to trip the P1235 codes ..
and with MRs it will throw a combination of codes that include P1870 and P1890 (which is trans slippage .. which is NOT TRUE
)MAF failure is P0102 code ..
Limiter / Overboosts are typically P1235 / P1238
And like I mentioned some time ago in a thread that was closed
(I wasn't the cause of the closure !! ) guys with MBC are going to be pissed this winter because they are going to trip the P1235 codes ..
Dec 17, 2008, 08:41 AM
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P1235 shows up as "MAF Plausibility" in the service manual...which is the airflow limiter code.
Overboost is a P2XXX code...can't remember off the top of my head.
Dec 17, 2008, 11:25 AM
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Thanks for the input
Does this mean my Maf sensor is about to fail with P1870 and P1235 code???
Gunzo have you replaced your MAF sensor?? How much did it cost you?
The guys at saskatoon dealership hates me because i bought my car in vancover. So i not sure if i want to go back there and get it warranty
Does this mean my Maf sensor is about to fail with P1870 and P1235 code???
Gunzo have you replaced your MAF sensor?? How much did it cost you?
The guys at saskatoon dealership hates me because i bought my car in vancover. So i not sure if i want to go back there and get it warranty
Last edited by Red Dragon; Dec 17, 2008 at 11:27 AM.