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Old 06-02-2010, 12:59 AM   #1
RdRx02
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Default How to Clean MAF 02 WRX

How do you clean the MAF without causing any harm to sensor? I have never cleaned mine and am getting both P0172 and P1131 popping up (after installing a catless TBE). Only other mod is a short ram intake. Hoping that this cleaning will get rid of this code. Still gotta do a few other checks for leaks. Never had these codes before the exhuast was swapped out.
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Old 06-02-2010, 01:01 AM   #2
ShaneInHisRoom
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brake cleaner is what i've always used.
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Old 06-02-2010, 01:07 AM   #3
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This stuff FTW... spray the sensor on both sides as well as slightly down in the tube, let air dry. done.
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Old 06-02-2010, 02:14 AM   #4
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http://www.obd-codes.com/p0172
P0172 System too Rich (Bank 1)
http://www.obd-codes.com/trouble_cod...obd2-codes.php
P1131 Front oxygen sensor circuit malfunction (short circuit)

i'd say its an o2 sensor or wiring
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Old 06-02-2010, 02:55 AM   #5
flukewrx
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Use the CRC MAF Sensor Cleaner. However it sounds like you might be looking to get some type of CEL Fix (either Mechanical or Electrical) as that might solve the problems that you are now seeing after recently swapping in a new exhaust setup.
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Old 06-02-2010, 07:42 AM   #6
prometheum
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Quote:
Originally Posted by flukewrx View Post
Use the CRC MAF Sensor Cleaner. However it sounds like you might be looking to get some type of CEL Fix (either Mechanical or Electrical) as that might solve the problems that you are now seeing after recently swapping in a new exhaust setup.
no this is the front O2 sensor...you do not want to put a mechanical cel fix on the front O2 sensor
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Old 06-02-2010, 07:53 AM   #7
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The Maintenance FAQ in the maintenance forum has the correct answer.
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Old 06-02-2010, 09:22 PM   #8
RdRx02
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Thanks for the help! Only my P1131 has come back on abruptly the other code has disappeared. One of my buddies said that doing a tune should rid that code from my car.

Have yet to do that but my ECU was replaced last year with a newer version by dealer under warranty. My buddy and I tried to do a ECU Flash with his Tactrix setup but it kept timing out (when trying to write / communicate to ECU in my car). He programmed his WRX and another guys WRX ok but with mine (the newer ECU) it wouldn't do anything. He had heard in the past that some ign. switches are more finicky than others and that could be part of the issue. Is there something that the dealers can do to lock out a ecu flash?? Has anyone ever heard of this happening before?
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Old 06-02-2010, 09:30 PM   #9
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A dealer cannot lock it out as that's against federal law.
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Old 06-02-2010, 09:46 PM   #10
Cornercarver82
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Also when you clean your MAF with the CRC(I use it too) it's a good measure to put a little dab of dialectric grease on the plug contacts. It keeps moisture out and promotes elecritcal continuity.
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Old 06-02-2010, 11:05 PM   #11
prometheum
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Quote:
Originally Posted by Cornercarver82 View Post
Also when you clean your MAF with the CRC(I use it too) it's a good measure to put a little dab of dialectric grease on the plug contacts. It keeps moisture out and promotes elecritcal continuity.
dielectric grease doesn't not promote continuity.

anyway its a bad o2 sensor no amount of tuning its going to magically fix it . you've got a short circuit somewhere disconnect it and shoot the 2 pins to ground from the probe side to find out where your short is from; make sure its not the car.
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