Passat (B5) :: MBC / Limp Mode / Surging In 4th And 5th Gear Under Boost
Aug 25, 2009
I have a 2004 1.8T AWM auto tranny Passat with APR chip. CIA, Bolt down Coil Packs, Bosch F6DTC plugs, OEM cat to straight pipe to magnaflow muffler, N75J, Forge DV (not the 007).
I installed a MBC bypassing the N75 to keep the spike at 16psi and hold (the n75J i spike at 22psi and hold 12~14), When I did that, the car will go in limp mode from 'over boosting'. I have to turn the MBC down to 9 to keep the car limping out. I love the way the MBC have the boost curve (the N75 is too passive for me). would like to fix this issue.
Also, with the N75 and or MBC, while in the APR 93 oct chip mode, I always get surging in 4th and 5th gear. Any time the boost is over 10psi, it is like I have tons of boost, but the engine is not using it. APR said it is the tranny, the tranny shop said it is the engine or computer, the engine shop said it is the tuning.
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so i was driving the vw and the car starts surging like its in limp mode but no cel! so i stopped and checked my engine bay to see if maybe my intercooler piping came loose but nothing! so i shut it off for about 5 seconds and turned it back on and it threw a cel! the whole time i was driving it home felt like it was going in and out of limp mode and would not boost past 4 psi! check the cel and came back as this:
P0238 turbo/supercharger boost sensor a ckt high input
p0106 map/baro ckt rng perform
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Wife's Passat went into "limp mode" and will only give me 4th gear. Check engine light came on when it happened. I had a buddy scan the car with OBD scanner and it is saying Sensor A is bad? Which sensor this is, or thought of writing down the code that it was throwing. My guess is the speed sensor for the transmission.
Luckily the car is a W8 and has enough power to pull the car from stop in 4th gear. There aren't any reputable VW dealerships in my town or any neighboring town. I've decided to take the car to a VW/Audi specialist some 60 miles away. They told me they can take a look and replace if needed. I absolutely do not trust VW dealerships/service around here. I've heard nothing but nightmare stories about them.
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Having trouble with car going into limp mode or just not boosting at all. Tried some basic things to fix it, plugs, coilpacks, tune, none have work.
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Was driving the other day and one of the couplers came loos and I lost boost and went into limp mode. I pulled over, got it reattached, and after that it would only hit 10 lbs. i have a KO4-001 with the GIAC file and it usually hits 20+ and holds 20 lbs. I have a regular code reader and I had a code for the EBC, cleared it, rechecked the hoses, and verified with the flash loader that I was on the correct file, but it is still only hitting 10 lbs. What else I should check.
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There ended up being 6 or 7 codes. Originally the first O2 sensor and wire seemed to go bad, I replaced them and it ran well for a couple days and then started running like ass again...Now there are a few codes, none for the 02 sensor, but for over boost issues...Does this mean my n75J valve is causing the problems? Is it possible that my software is just going bad? ...I bought the car somewhat molested and don't quite know the extent of the parts on it, nor the brands( specifically, the software...).
The current codes being thrown:
P0238 mani pres g31 sig to high
P0234 overboost
P0106mani barometric sensor g31
We replaced the manifold pressure sensor, and am not having the issues but they could and probably will come back after 50 or so miles...Previous code also was P1114 02 sensors and we replaced the front sensor. It may be that the software that is on the car is starting to go..
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Preliminary info:
APR 93 tune
Carbonio Intake
Silicone TIP
I picked up my 20th today and drove it 4 hours home. It has 74k on it, original timing belt. The timing belt kit is in the mail on its way here. Its the first thing I'm doing.
As I was driving it home on the autobahn doing about 150k/hr and I gave it half throttle to pass, I felt the turbo spool and I accelerated past the car. However, when I went to make the next pass, it felt like I had no power. I feathered the throttle a bit and it felt like my car was only getting maybe 3 PSI of boost. Very little actually. I do not have a boost gauge so I can't really say it accurately. As I was driving, i shut the ignition off and turned it back on. After that, I was able to get full pressure back.
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I currently own a 2001 Jetta 1.8t. It is currently tuned for 15 psi supposedly. I have never seen that number been hit and the highest it will go(only in 4th and 5th gear) is 13-14psi on a good day. And even when it does get there it does not hold the boost what so ever. It will start losing boost almost as soon as it reaches those numbers. Another thing is my MAF is currently unplugged and is making my car throw a code. When MAF is plugged in it cuts out boost and goes into "limp" mode.
Here are some engine mods that may be apart of this issue:
- Front mount intercooler, full intercooler pipe kit
- Oem diverter valve
- N75 j valve
- ACHTUNING tune on 15 psi not sure which stage
- Forged turbo inlet pipe
- 032 motorsports crankcase breather hose conversion
- Ecs tuning
- 2.0t coilpacks and mounting plate
- AWP head
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I have been battling a big boost upon acceleration at stoplights for approximately 6 months. Now twice I have gone into limp mode and the tech reads: PO700 (Transmission) and PO731 (Gear 1). I just turned over 190,000 miles but only purchased it a year ago. What is the problem(s)?
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My wife hit a deer going 60MPH 3 hours from home. Go back up and pick up the car, it's down on power, I feel it surging on and off boost, hard to drive smooth. Roughly a half hour later I get a CEL. Don't have the code handy, but Boost limit Maximum exceeded. My local VW dealer says its a normal wear and tear item so Allstate will not cover it. The car had the radiator, radiator support, condenser, hood, bumper, grill, passenger fender, timing belt cover and timing belt replaced.
Allstate says not covered, like a flat tire, once I leave the shop, its like a flat tire on the road, nothing to do with the repair. BTW I had it repaired at an Allstate recommended PRO shop. I get it back tonight after 8 weeks of fooling around. Will need to check the actuator, hopefully it's bad. The turbo itself is good, boost fine, no smoke.
This is an 04 Passat 1.8T. I have had 14 cars with turbos, still have four and have never had a turbo go bad, full synthetic oil every 3K and 60 second cool down in hot weather.
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So yesterday, this had happened for the third time in 3 years owning this car. Unhooking the battery for 20-30 minutes resets the computer and it is ready to go for a while with no issues. This has become annoying though. What is causing the car to enter "limp" mode and stay in third gear? One time it happened, I brought it to AutoZone and they did a scan and came up with the speed sensor. I haven't replaced it because it didn't happen for a while after that.
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Should we go to a transmission specialist or a regular shop for our issue? 2006 Kia Sedona - won't shift into reverse suddenly and is in "limp" mode, only staying in 3rd gear.
My concerns are primarily getting it done correctly and as cheaply as possible. I've read that the issue could be an input or output solenoid or maybe having to get a full on re manufactured transmission instead. But the consensus appears to be having it properly diagnosed.
So my question is, will the local shop around the corner who is pretty good with most repairs be able to properly deal with this? Or am I better off skipping them and going to the specialist?
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I just bought a 98 passat 1.8t manual trans, its has 105k on it now, I am having a problem with the turbo surging. I am running about 17 psi however every now and then i can put it to the floor and my boost gauge will jump from 12-17 just back and forth, I also have a prob every now and then where it will only build 4 psi and stay there i can down shift take my foot on and off the gas and still no change then just all of a sudden 17 again both these probs are intermittent looked briefly at vacuum lines.
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Today I decided to change my rotors and pads out.. Got everything back together and i believe car is in limp mode.. It wont shift out of 3rd.. Abs light on ,check engine light, traction control and stability control light on.. Also my speedometer doesn't work but my rpm"s do...hooked up scan tool and comes back as wheel speed sensors.. I never touched them or removed them....
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I have 1 month left on my AAMCO rebuilt transmission. I took it in a few weeks ago when it went into "limp mode" (Stuck in 1st gear). Eventually, they got an error code of P0730, which I believe is electrical-related. All was pretty good but then today, driving @ high speed on the interstate, I could not get into 4th gear...
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Passat 2008/09 TSI engine 16k miles. APR stage 2+
I was driving normally and suddenly EPC light comes on, and the engine goes to limp mode. I turn the engine off and then turn on again. Everything runs fine. Vag shows N276 intermittent fail. I had already this fail, but always when starting engine, and the engine used to run OK. Is this a "sign" that is time to replace the HPFP? Or can I take the chance and keep running?
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I have the problem of over boosting and hitting limp mode. now does that mean i adjusted the actuator wrong when putting it back on? if so how do i adjust it properly. or is there something else i can do to make the car come out of limp mode? also since it is boosting past a certain psi should i put a mbc on it and adjust it down?
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Nissan XTerra 2005 transmission RE5R05A. Trouble code is p1757 When I go from park to drive it goes out of gear and puts my car in limp mode. I took it to the dealer and they told me that I have to replace a transmission another place told that it could be brake solenoid or oil filter. In third place they told me it could be the TCM problems.
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My friends has an 06 3.6 motion sedan and has a problem. His car went into limp mode with the ECM and traction control light as well as CEL. we took it to the local dealer (45 min away) they scanned it and said that the throttle pedal was the only code that wouldn't clear. He ordered a new pedal from ECS and installed it today. The cars still in limp mode we read about a potential throttle body adjustment procedure (not too sure of the validity) any how followed it open hood open door ignition in the "on" position for a few minutes. After that when he started it every warning light came on. Is there a step in pedal replacement we re missing? On a side note the connector on the pedal end was fairly damaged not sure what from maybe the po had a botched replacement attempt? Not too sure what to try next.
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I got into my car about 5 minutes ago and while driving i noticed a ample amount of power loss. I would go half throttle and my rmp's would go up by my speed seemed lacking even full on it it seemed to be lagging and was a slow climb to 60. Could it be my turbo not putting out or something more serious. Its a 99 1.8t ....
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We have a 2006 Passat, 30K miles, live in northeast on a Great Lake. We bought it used in 5/07 with 11K miles on it. The other day, a whole mess of warning lights came on, and the car went into "limp mode." The dealership diagnosed corroded wires where they connect to the throttle valve controller. We usually keep our cars for years, and we've never had corroded wires before. Is this a typical problem of VW's? The service mgr said he'd seen about 6 come in in the last year, but I don't know if that's a lot or a few compared to other brands. We're getting ready to shop for cars again, and we'd consider a new Jetta, but not if it can't go out in the rain. Also, if the wires corroded once, what will keep them from corroding again? Should we expect this to keep happening?
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