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Discussion Starter · #1 ·
Hi guys,

I have been following these forums for a while now and I finally decided to sign up myself. First of all, I would like to point out that I have read as much as I could from previous topics but I am still stuck with my car going into the dreaded LIMP MODE. I own a 53 reg (2004) Honda Civic 1.7 TDCi, it has around 90000 miles on the clock.

A couple of weeks ago I was on the motorway going about 80 mph and the cars engine started to shake and jerk a little and out of nowhere I have lost all power and the car would not go over 2000 revs (LIMP MODE like so many others have had on this forum).

I decided to take the car to Honda, they took a look at it and told me that the the fuel filter was broken and needed to be replaced. I OK'd it and they charged me £120 including labour. However around a week later on the motorway, the exact same thing happened to the car. This time around Honda looked at the car and told me that they received the following code P1236. They told me that the turbo needed to be replaced and said that it would cost £1200. I refused to pay this and took the car to a garage a friend recommended. The mechanic took a look at the car and called me later on to tell me that he could not find any faults with the turbo (all pipes were good and so on).

I just don't know what to do with the car now. What else could it be? The EGR valve (I asked him to clean it and replace the oil filter as well)? I will also as him to check the air mass meter. From your experiences what else could cause this problem? Has anyone that has had the same problem/s been able to get the car fixed?

Anyway, does P1236 definitely mean that the turbo charger is broke and if so, is it a good idea to buy a reconditioned turbo?

Thank You
 

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2003 honda civic 1.7cdti limp mode

Probably sticky VNT vanes.
Get the turbo VNT vanes cleaned or recon.

The vanes should open to let exhaust by pass the turbo and lower the boost.
If they dont open the turbo provides too much pressure or overboosts.
 

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Yep could be the vnt , you can give it a check by making sure that the actuator arm pulls back when the car starts, should pull on to a bumpstop, they could still be sticky tho and no completely seized yet, defiantly no boost leaks ?
 

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Discussion Starter · #4 · (Edited)
Yep could be the vnt , you can give it a check by making sure that the actuator arm pulls back when the car starts, should pull on to a bumpstop, they could still be sticky tho and no completely seized yet, defiantly no boost leaks ?
According to the garage no. Would I be better off buying a new turbocharger or should I just ask the garage to check the vanes?

Cheers.
 

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This happend to me on my old 2003 civic over a year back. I got same code and I took it to Honda garage and they said it was the turbo. However they quoted me £400 all in for a new turbo which I agreed to. All was replaced and now the car works fine.

Sent from my Nexus 7 using Tapatalk 2
 
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in my experience when the map sensor goes it would not make the car overboost , is the car remapped ?
You're right, a faulty sensor wouldn't necessarily make the car overboost, but if the sensor was faulty and giving a high signal output then the ECU might then wrongly report that the car was over-boosting (even though it wasn't!)... we only know it's 'over-boosting' because the ECU is reporting the DTC P1236. If it's an easy job, it may be worth inspecting/cleaning the MAP sensor before dismantling the turbo?
 

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Discussion Starter · #15 ·
You're right, a faulty sensor wouldn't necessarily make the car overboost, but if the sensor was faulty and giving a high signal output then the ECU might then wrongly report that the car was over-boosting (even though it wasn't!)... we only know it's 'over-boosting' because the ECU is reporting the DTC P1236. If it's an easy job, it may be worth inspecting/cleaning the MAP sensor before dismantling the turbo?
I'll get him to take a look. cheers
 

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P0238 would suggest a MAP sensor issue...especially combined with P1236
 

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any news on this one? just had a same problem with 118milage on 2002 turbo been reconditioned by previous owner 3 years ago
 
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