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Greg, Technician
Category: Car
Satisfied Customers: 7347
Experience:  Automotive diagnostic tech
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Change from auto to manual still using the auto ecu , enginecheck

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change from auto to manual still using the auto ecu , enginecheck light came on ,it was asking for inhibitor switch , this a 2005 Isuzu dmax 3.o diesel manual, also I am getting some smoke after rethrottle just a slight burst ,not blue or black smoke ,
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Hi .
Did you check for malfunction codes if yes what where the codes you recorded .
Customer: replied 2 years ago.
p2157 is the code that came up ,I was asking for an inhibitor switch , but from m y knowledge u only require that on a auto transmission ,
Yes correct this code will pop up due to the Inhibitor (PNP) switch now not being connected, as this part is on the side of the transmission automatic.
This you will have to live with or replace the ECU.
But with the check engine light being on could be a MOT issue for a failure ..
Slight burst of smoke is normal nothing much to worry about ,unless it blue or black.. slight white is condensation in the exhaust system d
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Kind regards Greg.
Customer: replied 2 years ago.
would that cause a back fire now and then
Back fire on a diesel is a sign of bad timing ,bad cam or crankshaft sensor . Normally a misfiring engine on diesel will produce smoke so this could be the smoke issue you have now and again . Recheck for codes see if you have any other codes . No codes do a engine compression test . Compression good, then have the fuel tested could be bad ,water etc. Rgds Greg
Customer: replied 2 years ago.
But u still recommend I change the ecu
Yes if you don't want the Check engine light to be ON and fail you on the next MOT..
Greg and other Car Specialists are ready to help you
Customer: replied 2 years ago.
thanks a lot greg you have been tremendous help
Thank you Sir!!