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Code P0102

Tiny
EJ1096
  • MEMBER
  • SATURN
I have a 2002 saturn lw300, with 90,000. I got the code p0102 mass air flow low input circut. I cleaned the sensor, checked for clogs in the intake system, and reset the code. Code still came on. I replaced the MAF sensor. Code still came on. The car seems to run fine. It might have a little less response to the throttle than it used to, but I know thats because of what ever is making the SES light come on.

So any ideas, the MAF sensor has been replaced. This is driving me crazy.

Thanks for the help.
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Sunday, July 22nd, 2007 AT 2:25 AM

8 Replies

Tiny
CHEVY22
  • MECHANIC
  • 1,375 POSTS
WAS THE PCM RESET AFTER THE REPLACEMENT, ALSO CHECK BATTERY VOLATGE RUNNING AND OFF
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Sunday, July 22nd, 2007 AT 7:33 AM
Tiny
EJ1096
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Ya after replacement the codes where cleared. When the code gets cleared it stays clear untill the car gets turned off. So I clear the code. Drive the car. Get to where I need to go. When I turn the car back on ses light and code return.

So the Batt. Might do that to the MAF sensor?
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Sunday, July 22nd, 2007 AT 2:29 PM
Tiny
CHEVY22
  • MECHANIC
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VERY POSSIBLE. LOW VOLTAGE WILL CAUSE PROBLEMS IN MANY ELECTRONICS IN VEHICLES, AND DO A WIGGLE TEST AT THE MAF CONNECTOR TO SEE IF OT RUNS DIFFERENT
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Sunday, July 22nd, 2007 AT 8:52 PM
Tiny
EJ1096
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I'll check the batt. And do the wiggle test. Thanks for the ideas. I'll post when I do thoes and let ya know
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Monday, July 23rd, 2007 AT 2:18 AM
Tiny
EJ1096
  • MEMBER
  • 5 POSTS
OK, I checked the Batt voltage. Batt is good. Wiggled wires and no change in operation. The old maf sensor when I lightly tapped on it, the car would start to run rough then die. The replaced one I can lightly tap on it and there is no change in operation.

I have cleared the code with a code reader. It goes out till the next time I start the car after being driven. I have disconnected the batt. The code again stays out till the car is restarted after the inital drive

I got a chiltons book for it but that dosent tell ya squat. I was looking for a wireing diagarm and something that says what wires go where and what they should be reading when I put an oham meter on it.

I'm totaly out of ideas.
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Saturday, July 28th, 2007 AT 1:48 AM
Tiny
EJ1096
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  • 5 POSTS
I might just have to break down and take it in. Any body got any more Ideas? I really dont have the money for that.
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Monday, July 30th, 2007 AT 3:07 AM
Tiny
FMTHEFIXER
  • MEMBER
  • 11 POSTS
Check for a vacuumn leak
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Monday, July 30th, 2007 AT 6:48 PM
Tiny
CHEVY22
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The diag sheet is way too long to run down, but if you go onto ondemand. Com and check out diy you can purchase what you need for your can very cheapl and its good for one year and this is the whole car not just the maf circuit
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Tuesday, July 31st, 2007 AT 6:31 AM

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