I have a 2003 civic 1.7 ctdi with 78000 miles and going into limp mode and engine management light on constantly. Computer codes read po238 102 113 and p1236. I have tried cleaning the turbo pressure sensor and replaced the mass air flow sensor but no change. The car isn't smoky and according to the service book it had a new turbo fitted 6000 miles ago. It's been suggested I change the fuel filter and clean the egr valve. Can you help please
Code p0238 refers to manifold absolute pressure (MAP) sensor A TC system --high input===causes --wiring short to positive --MAP sensor---ECM
Replace the sensor (internal fault)
code p0102 refers to mass air flow (MAF) sensor /volume air flow (MAV) sensor --low input ===causes wiring short to ground ---MAF/VAF sensor
again the MAF is implicated as faulty
code po113 refers to intake air temperature (IAT) sensor--circuit malfunction===causes --wiring open circuit/short to positive --wiring short to ground --ground wire defective---IAT sensor---ECM
Now looking at all the codes the most common fault is wiring damaged so pay particular to the condition of the wiring loom --the condition of the connections --clean pins - pins not bent --water in the connections . IT is common that when disconnecting the units that the connection is pulled apart by pulling on the wires .. This check is the cheapest before any money is spent on the rest . Do not clean but replace because if cleaning does not produce a result you still do not know if you cleaned it properly or if it is faulty
Fuel Filter Removal & Installation To Remove:
To Install:
This may work
I found it on fixya.
SOURCE: 1999 pontiac grand prix . will not run
If wiggling the wires cured the code, then one of the wires is broken inside the insulation. Pull on each wire one at a time. look for the colored insulation to stretch, this will be the broken wire. For the other car that wont rev up, this is a common when the catalytic concverter is plugged up. This will also cause MAF codes, and in turn, TRAC OFF light.
See http://www.greatautohelp.com
SOURCE: Audi 2001 A4 (B6)TDI SE 130BHP
you need ot do a tune up, these problems are ussually associated with bad wires and coil packs...
SOURCE: 2005 silverado lt 6.6 duramax diesel turbo..engine
Before we do anything else lets do a fuel pressure check to make sure the pump is a-ok as well as the fuel pressure regulator. Your gonna need shop manual for this as well as a fuel pressure tester. If all checks out then move to the Turbo code.
Turbo code looks like the waste gate is stuck open and your not building the boost. Do a visual inspection look for any signs of overheating and bearing wear. Check or change oil as needed.
With regards to the Mass air flow I believe you have to replace it. Keep in mind this thing might be the root of you whole problem.
I strongly suggest you use the shop manual for the codes you got. it will make this repair a snap.
SOURCE: van sputters whenever you go to take off from a
hi there, i had the same problem with my 98 astro van, and took it to the shop, the computer pumped out a mass airflow sensor, they replaced it at considerable cost lol, but the van now runs good
SOURCE: I have a 2001 Ford Escape xlt V6 3.0L engine.. I
hope this helps,Tim:
http://www.obd-codes.com/p0401
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