Max boost pressure code p0238 - MINI Cooper Forum
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post #1 of 4 (permalink) Old Mar 19th, 2019, 11:35 PM Thread Starter
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Max boost pressure code p0238

Hi all, via torque pro my 2008 1.6D is hitting over 21psi peak!
Anyone know what a stock car should be boosting too?
Im getting code p0238, this indicates map sensor, map sensor readings are approx 35psi, so can a faulty map sensor be causing it to boost this high?
My maf readings are 119g/s, this equates to approx 147hp .

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post #2 of 4 (permalink) Old Mar 20th, 2019, 07:46 AM
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Originally Posted by LeeCooperS View Post
Hi all, via torque pro my 2008 1.6D is hitting over 21psi peak!
Anyone know what a stock car should be boosting too?
Im getting code p0238, this indicates map sensor, map sensor readings are approx 35psi, so can a faulty map sensor be causing it to boost this high?
My maf readings are 119g/s, this equates to approx 147hp .
psa 1.6 hdi engine, the turbo is vnt type so has a grub screen on the turbo body that is set when turbo was made if this works its way loose then that will be the issue, worth check first, the vnt vac pressure for the actuator is set 15psi with a vac pump so it rests on the stop at 15psi, thats the turbo end of it,
i would remove the map sensor and clean it with switch cleaner and small modellers paint brush might just be carbon build up stopping it from resetting back to zero as such, if heavy carbon on it would be thinking dpf filter is needing doing at some pint soon,, volvo and ford use same engines and they say 75.000 miles need to replace the dpf filter and 40k for additive tank, you will need a proper diagnostics tool autocom cdp plus is best for value and will do everything,, to be honest you will struggle to find whats really wrong with yours now if its not the map sensors or turbo as need to deep scan it, ie dealer only code s and live data runs,


good tuners/repairs in southwest uk top guys 01579388980
good tuner/ecu body control clones etc lancaster up north uk DALE PHONE NUMBER 07807 222262 top guy.
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post #3 of 4 (permalink) Old Mar 21st, 2019, 09:51 PM Thread Starter
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Thankyou for your detailed reply! Its on 122k now, grub screw stop not moved, map sensor cleaned, ordered new one now!
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post #4 of 4 (permalink) Old Mar 22nd, 2019, 08:20 AM
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Originally Posted by LeeCooperS View Post
Thankyou for your detailed reply! Its on 122k now, grub screw stop not moved, map sensor cleaned, ordered new one now!
122k it will be needing a dpf filter for a start link below,
https://www.ebay.co.uk/itm/Diesel-Pa...cAAOSwrlRZzqcC
also a turbo would be a good move link below , i]ve used the below kit before was ok,
https://www.ebay.co.uk/itm/PEUGEOT-3...UAAOSw8gVYB32y

i suspect the turbo is leaking oil into the inlet side of turbo charger just enough at moment to make engine run on its oil oil as such, very very common when dpf filter is blocked and heat and back pressure destroy the seals in it, does it smoke really bad at same time if then deffo turbo,, if not so bad then still would check for oil leaking from turbo,
if not the above throttle might be faulty need to scan it with something like autocom on live data see whats doing what

good tuners/repairs in southwest uk top guys 01579388980
good tuner/ecu body control clones etc lancaster up north uk DALE PHONE NUMBER 07807 222262 top guy.
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