('98-'00) Check engine light - Subaru Forester Owners Forum
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post #1 of 9 (permalink) Old 06-20-2019, 04:18 PM Thread Starter
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Check engine light

Had the Check Engine light on my 99 SF5 model S and was told I need to replace the MAF sensor; I replaced the sensor and the car drivers better but the Check Engine light is still on. Do I need to clear the sensor? Instructions and help on how to clear is appreciated before I bring it back to the parts store for another reading.

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post #2 of 9 (permalink) Old 06-20-2019, 04:55 PM
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you will need a scan tool with the delete cel codes function , almost all cheap scan tools will do that

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post #3 of 9 (permalink) Old 06-20-2019, 05:11 PM
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Some CELs will clear after a number of start cycles.

Alternatively reset the ECU: How To: Reset ECU (Engine Control Unit)

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post #4 of 9 (permalink) Old 06-20-2019, 06:07 PM
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@Jvanhoe most auto parts stores will read the CEL codes stored, but won't clear the codes. Some will allow "you" the option to clear the code, but they're not allowed to clear it for you.

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post #5 of 9 (permalink) Old 06-21-2019, 04:27 AM
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On a 99 model I thought disconnecting the battery for 10 minutes would reset or "clear" codes.

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post #6 of 9 (permalink) Old 06-21-2019, 05:42 AM
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@Jvanhoe -
It is pretty handy to have a scan tool.
I bought one from OBDCOM Diagnostic Systems for ALL vehicles quite a while back (laptop version) which now sells for $88, but for a couple of bucks more, they have a stand alone device.
I can't tell you how many friends I've saved from a dealer visit, just because they forgot to close their gas cap and got a CEL.
You can see any stored codes and clear them, as well as look at a lot of diagnostic displays in real time on the car. (Not while you are driving, of course)
It's well worth the money.
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post #7 of 9 (permalink) Old 06-21-2019, 07:58 AM Thread Starter
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Thanks everyone for your help. I'll go to the parts store and pick up a scan tool and check the ECU instructions.
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post #8 of 9 (permalink) Old 06-27-2019, 08:36 AM
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Basic OBD2 that reads and clears is $20 @ Wally'smart.
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post #9 of 9 (permalink) Old 06-27-2019, 09:19 AM
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Quote:
Originally Posted by wtdash View Post
Basic OBD2 that reads and clears is $20 @ Wally'smart.
Yup this. One of the best $20 (or less, i think mine was) i ever spent, seriously.


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  Subaru Forester Owners Forum > Technical Forums and Vehicle Assistance > Engine and Exhaust > EJ25 - 2.5L Non-Turbo (1998-2010)

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