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What the code 30 means - 1994 Jeep Grand Cherokee

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P 0030 is Bank 1 Sen 1 Heater Circuit

Posted on Oct 10, 2010

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Posted on Jan 02, 2017

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I've gotten a code 12 on my 95 grand Cherokee orvis. I've read that it means the battery or power to the ECM disconnected in the last 50 key cycles. I don't know what that means exactly. Any help?


It means the Engine Control Module knows that it should contain some history and it doesn't, so it throws up a Code 12 error code to let you know. It should go away after it has been driven a week or so. If it doesn't go away, go to your local friendly garage, smile sweetly and ask them if they wouldn't mind clearing the code. It takes about 30 seconds with a card reader and they will do it for you free of charge.

Jun 12, 2016 | Cars & Trucks

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What does the eror code e30 means


Code 30 means the idle speed control RPM is out of range.
The computer can not keep the idle speed in the correct range.
Could be the control servo, a wiring problem, or something like a vac leak.

Dec 20, 2015 | 1992 Cadillac DeVille

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Car looses power, bogs down check engine flashes rapidly. No acceleration, then 15 - 30 seconds later power comes back and check engine light goes solid and stays on for 2 or 3 days.Anyone with idea?


You should read check engine code.
It tells you more than you can guess.
You can buy quality $1000 snap-on OBD scanner or $30 cheap one.
$30 will do good job. (you need to google after car tells you error code because cheap scanner shows only code but not meanings in plain English)

or you can visit local autozone and ask them read code for free.
unless you ask car itself, nobody will be accurate.

Dec 02, 2015 | 2003 Mazda Protege

1 Answer

Can't find OBD Code meanings for the followinng codes 30, 1721, 521 and 653


It can actually depend on the type of vehicle you drive.

If you Google 'Error code 30 Toyota' (or whatever car you own) you will find them.

Error codes are not the same across different vehicles

Nov 02, 2015 | Cars & Trucks

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I still have a engine light on after resetting it. I changed both sensor after a po30 code. Is there a third sensor?


Code 30 is for a problem with the heater in the O2 sensor bank one sensor one. That is the sensor before the catalytic converter.
The code does not mean you should replace the sensor, it means the sensor is not getting hot as it should. The problem could be in the sensor, or the wiring, or the power source.

Oct 21, 2015 | Cars & Trucks

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Hold light is on 1998 montero sport what does it mean


Hold warning light,what means? - Fixya

www.fixya.com/cars/t6229586-hold_warning_light_means
Sep 30, 2010 - Mitsubishi 1998 Montero Sport question. ... Theres a red light on that looks like the check engine light but it says hold in it, what does it mean. Jan 28, 2011 ' 2001 Kia ... Which O2 sensors relate to error codes PO130 and.

Sep 11, 2015 | Cars & Trucks

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What does code p1000 mean on 97 experdition 4x4 5.4 motor


It means the motor hasn't completed it's drive cycle. If you've had work done and the battery was disconnected it sometimes trips the code. If it doesn't go away by itself after about 30 miles or so you might need to get the computer reset at a shop.

Jul 22, 2014 | 1997 Ford Expedition

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I have a 94 ford f150 i took it by autozone and had them do a code check cause my check engine light was on they said the code was code 98 then the tell me that it means electronic pressure control driver...


You need to replace the transmission shift control solenoid on the transmission, when theres a problem you may experience hard shifts, not shifting into OD. Part cost between $30-70.

Feb 19, 2011 | 1994 Ford F150 Styleside Supercab

1 Answer

What is the meaning of the code (J317) Bordspannung Klemme 30


THAT COULD MEAN J317[IGNITION RELAY OR ECU RELAY TERMINAL 30 HAS OPEN CIRCIUT.COULD BE A FAULTY RELAY,HOPE THIS HELPS.

Oct 21, 2009 | 2006 Volkswagen Passat

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