Fuel Trim
08-12-2003, 03:18 PM
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Location: Texas
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E430
Fuel Trim
I'm trying to chase through a double Fuel Trim fault code (bank 1 & 2) on a '98 E430, with 89k miles.
Have replaced filters (fuel & air) and cleaned off MAF sensor. All hoses look good, and have put injector cleaner through system. Codes can be cleared but re-appear within a day or so.
I would like to do a check on the MAF sensor but have no data on voltage etc. (I'd be using a digital voltmeter capable of mV type readings). Anyone have voltage ranges or similar to use?
Anyone have any further suggestions to check the system out?
The system has had a O2 sensor replaced recently, which had been down for some time - related?
Thanks
Have replaced filters (fuel & air) and cleaned off MAF sensor. All hoses look good, and have put injector cleaner through system. Codes can be cleared but re-appear within a day or so.
I would like to do a check on the MAF sensor but have no data on voltage etc. (I'd be using a digital voltmeter capable of mV type readings). Anyone have voltage ranges or similar to use?
Anyone have any further suggestions to check the system out?
The system has had a O2 sensor replaced recently, which had been down for some time - related?
Thanks
