Talk Morgan Forums Morgan Sports Cars Morgan Three Wheeler & Super 3 Help Finding Location of USB Connection on ECU???

Just google p0170 bad site front = fuel trim malfunction bank 1

P0173 = bank 2

P0170 - Fuel Trim Malfunction Bank 1 Possible causes Intake air leaks Faulty front heated oxygen sensor Ignition misfiring Faulty fuel injectors Exhaust gas leaks Incorrect fuel pressure Lack of fuel Faulty Mass Air Flow (MAF) sensor Incorrect Positive Crankcase Ventilation (PCV) hose connection What does this mean? Tech notes Dirty air filter, air filter housing or Mass Air Flow (MAF) sensor, or faulty MAF sensor are common causes for the P0170 code. What does this mean? When is the code detected? Fuel injection system does not operate properly or the amount of mixture ratio compensation is not correct Possible symptoms Engine Light ON (or Service Engine Soon Warning Light) Excessive Fuel Consumption P0170 Description With the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture ratio can be brought closely to the theoretical mixture ratio based on the mixture ratio feedback signal from the heated oxygen sensors 1. The Engine Control Module (ECM) calculates the necessary compensation to correct the offset between the actual and the theoretical ratios. In case the amount of the compensation value is extremely large (The actual mixture ratio is too lean.), the ECM judges the condition as the fuel injection system malfunction and light up the Malfunction Indicator Light (MIL) (2 trip detection logic).

Read more: https://www.engine-codes.com/p0170.html

Read this might help

http://www.talkmorgan.com/ubbthreads.php/topics/395341/Re:_Ugh...check_engine_light_i

Thanks guys for your input.

So it looks like my fuel mixture may be too lean. I am not really sure what I can do about this. My ProTune access is "read only", and I cannot make any fuel mapping changes myself. Looks like I may need to take it to the dealership for service.

As I mentioned at the start of this thread, the car seems to be running well. It idles smoothly, fires up on the first crank, and even power distribution.

Any advice???

Out of interest (and apologies if you said earlier in the thread) but what year is your M3W?

It's a December production 2016.

Mmmm, interesting. The early cars seem to be more susceptible to this than newer ones (looks like there have been map changes, either to base map or range of adjustment before error flagging). Good luck in sorting it out!