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Old 02-06-2010, 02:26 PM
ppeterso2 ppeterso2 is offline
Learning to use the forums
Join Date: Jan 2010
Posts: 6
Default Not so Mass Airflow Sensor OBD2 code P0102

Caution Long Post--but most of this info seemed important: One month ago, I bought my cheap 2000 Ford Ranger XLT 3.0L-V6 5 speed to use as a commuter vehicle to work with 99k on the ODO. I hit 100k and had the engine removed to address major leaks: RMS, both valve covers, Oil Pan gasket and the the truck leaks no more oil. Shop somehow ruined PATS system module and had Ford fix it (on them--I didn't pay any extra than what was quoted--because PATS was fine before...).

New Problem: Drove Truck 10 miles from shop, gased up and then Check Engine Light came on (I'm thinking Fuel cap or something). I had the same shop reset it twice (Code P0102 MAF A Ckt Low Input). They said, "Looks like we'll have to put a new MAF on it"--why would I spend more with them when the CE Light was not on before the engine was pulled? As I predicted. the CE Light came on again so I cleaned the MAF (with CFC MAF Cleaner--and probably screwed up b/c I sprayed the wires directly at full blast) and I pulled out my trusty OBD2 reader and got the same code (P0102 and the data stream showed "MAF FLOW 0.00 g/s" !!!!!--and that figure never changed driving around town today). I notice that after cleaning that the idle at ice cold start up was not as high as before and it idles down faster than before cleaning it. I cleared the DTC. Found a used MAF on ebay with only 14k miles on it to see if that works b/c I didn't want to invest the $ into a new one right away because i wonder if it is even bad... (it hasn't arrived yet).

Questions: How can I get a 0.00 g/s reading on the MAF???--I've never seen one fail that bad (had 4 mustang gt's). Anyone here experience this? I'm wondering if something is wrong with my PCM? The truck runs fine and is averaging 18mpg overall with an unusual idle surge at cold startup (like I'm patting the gas pedal slightly). Is this a dangerous situation that could mess up my engine?? or can I live with that P0102 code (if the newsed MAF doesn't work when I get it)? Thanks.
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Old 04-13-2012, 06:37 PM
UnknownSoldier UnknownSoldier is offline
97 Ranger 2.3
Join Date: Apr 2012
Posts: 10
Default Re: Not so Mass Airflow Sensor OBD2 code P0102

Try the idle air control valve, I replaced mine, and the truck runs great, who knew.
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