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Trouble Code P0174

I have a bmw 325i my service lite came on after i put in premium gas after using 87 for a year would that cause the code to come up i reset the lite and drove the car to boston and back and the lite did not come back on i was also down a quart of oil witch i put in . the car runs great did not use any more gas than i normaly do . can u help me

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  • 19 Answers

That code is for mixture adaptation lean. That means that the computer is getting the air fuel mix sorted out. Which could be partially attributed to the higher octane fuel. Typically it means there is an air leak in the induction system (intake manifold, air pipe after the Mass air flow sensor, or a vacuum hose or system) Check all connections on hoses and things under the hood. Make sure your gas cap is on tight. Take the car somewhere like Autozone and have the code deleted and see if it comes back. If it does, take it to the shop and have it checked out.

Posted on Nov 18, 2013

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Posted on Jan 02, 2017

SOURCE: 1987 bmw 325i

Give your vin number to a BMW mechanic and they can get the code from their database.

Posted on Sep 03, 2008

SOURCE: BMW radio code

take it to a dealer. I'm told they may not charge you for this.

Posted on Oct 21, 2008

LT1Rob
  • 55 Answers

SOURCE: check engine light comes on but car runs great 2002 bmw 325i and

The check engine light could be any number of things and the only way to find out is have the codes scanned. The brake light issue is common on E46 3 series. It is an issue were the brown ground wire that goes into the lamp housing melts at the connector causing a loose ground connection. The connector needs to be replaced and also add additional grounding wires to prevent further issues. And for fuel additives either use the cheveron techron, or the bmw fuel additive(the bmw stuff is the exact same thing, so just use which ever is cheaper).

Posted on Mar 12, 2009

SOURCE: i need code radio for my bmw 325i 1992

The only way to obtain a code is to call BMW with the serial number which is located on a stick at the back of the radio

Posted on May 20, 2009

  • 2841 Answers

SOURCE: check engine light bmw 325i code 340

Code PO340 "Camshaft Position Sensor Circuit Malfunction". Now that does not mean that if you simply replace the sensor your problem will be solved. It can be simply loose, cut, or corroded wiring. It can also be something entirely different. This is where diagnostic skills come in.

Posted on May 01, 2010

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Failed emissions with 2001 BMW 325i. Codes given were P0313, P0171 System too lean Bank 1, and P0174 System too lean bank 2. What do these codes mean?


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You can't use a tool to pull codes from an '87 BMW 325(e). You have the 2.7 liter and your DME, or computer is a Motronic. If you had a 325i, then a tool could read the codes because the computer was upgraded that year to a Motronic 1.1 system with a round plug in under the screw cap on the driver's side under the hood. The only tool you can buy is the one for resetting the service interval light and resetting the oil change light. To answer your question about going about finding your driveability problem would be to get a BMW Bentley Manual. This manual shows you how to use a standard voltmeter to check everything from your computer plug in. Your computer is located above the glovebox.

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Hello There

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Hope this helps. Pleas don't forget to rate me.

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