# Engine light keeps coming on **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** 330, engines, bmw, lights\ **Created:** [August 23, 2009, 3:16pm UTC](https://community.cartalk.com/t/engine-light-keeps-coming-on/35468 "2009-08-23T15:16:42Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![Wilbur](https://avatars.discourse-cdn.com/v4/letter/w/94ad74/32.png) [@Wilbur](https://community.cartalk.com/u/Wilbur)\ **Post date:** [August 23, 2009, 3:16pm UTC](https://community.cartalk.com/t/engine-light-keeps-coming-on/35468/1 "2009-08-23T15:16:42Z")
light keeps coming on. computer clears codes but cannot keep the light off. any suggestions or does anyone else have this problem? ---
**Author:** ![Caddyman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/caddyman/32/23_2.png) [@Caddyman](https://community.cartalk.com/u/Caddyman)\ **Post date:** [August 23, 2009, 3:58pm UTC](https://community.cartalk.com/t/engine-light-keeps-coming-on/35468/2 "2009-08-23T15:58:01Z")
Model year and what are the codes being stored?? Before the light will stay off, you must repair what is wrong… ---
**Author:** ![mcparadise](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mcparadise/32/32_2.png) [@mcparadise](https://community.cartalk.com/u/mcparadise)\ **Post date:** [August 23, 2009, 4:38pm UTC](https://community.cartalk.com/t/engine-light-keeps-coming-on/35468/3 "2009-08-23T16:38:59Z")
The codes indicate a problem. Until you fix whatever is making the light come on it will continue to come on. What are the codes? ---
**Author:** ![Wilbur](https://avatars.discourse-cdn.com/v4/letter/w/94ad74/32.png) [@Wilbur](https://community.cartalk.com/u/Wilbur)\ **Post date:** [August 23, 2009, 10:32pm UTC](https://community.cartalk.com/t/engine-light-keeps-coming-on/35468/4 "2009-08-23T22:32:22Z")
sorry…didn’t really state clearly. the light is SERVICE ENGINE SOON. The codes are E3 & E4. Lean condition on bank 1 & bank 2. No fault codes. Year of car is 2001. ---
**Author:** ![wizard](https://avatars.discourse-cdn.com/v4/letter/w/a87d85/32.png) [@wizard](https://community.cartalk.com/u/wizard)\ **Post date:** [August 23, 2009, 10:34pm UTC](https://community.cartalk.com/t/engine-light-keeps-coming-on/35468/5 "2009-08-23T22:34:19Z")
Great, got the year, what is the make and model now. ---
**Author:** ![Wilbur](https://avatars.discourse-cdn.com/v4/letter/w/94ad74/32.png) [@Wilbur](https://community.cartalk.com/u/Wilbur)\ **Post date:** [August 23, 2009, 11:05pm UTC](https://community.cartalk.com/t/engine-light-keeps-coming-on/35468/6 "2009-08-23T23:05:45Z")
sorry…it was posted in the beginning. BMW 2001 330 CCI ---
**Author:** ![Caddyman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/caddyman/32/23_2.png) [@Caddyman](https://community.cartalk.com/u/Caddyman)\ **Post date:** [August 23, 2009, 11:16pm UTC](https://community.cartalk.com/t/engine-light-keeps-coming-on/35468/7 "2009-08-23T23:16:00Z")
Just a guess…Check for a vacuum leak around the air-flow sensor then try replacing the forward oxygen sensors. Then see a BMW specialist…Nice Ride… ---
**Author:** ![Wilbur](https://avatars.discourse-cdn.com/v4/letter/w/94ad74/32.png) [@Wilbur](https://community.cartalk.com/u/Wilbur)\ **Post date:** [August 23, 2009, 11:21pm UTC](https://community.cartalk.com/t/engine-light-keeps-coming-on/35468/8 "2009-08-23T23:21:56Z")
we’ve already done that. experimenting with reg/premium gas to see. taking it to BMW …may as well buy a new car! it runs perfect by the way. never have any trouble with the operation but that light… ---
**Author:** ![hellokit](https://avatars.discourse-cdn.com/v4/letter/h/6a8cbe/32.png) [@hellokit](https://community.cartalk.com/u/hellokit)\ **Post date:** [August 24, 2009, 12:47am UTC](https://community.cartalk.com/t/engine-light-keeps-coming-on/35468/9 "2009-08-24T00:47:21Z")
It looks like you interpreted a lean engine from codes E3, and E4. Here’s another, but similar, interpretation from BMW forum: Message: I’ve been getting a “service engine soon” light on my '01 330ci and the code reader spit out codes E3 and E4: “Oxygen sensor adaptation limit” for both banks 1-3 and 4-6. As some on this board suggested, the problem was indeed a vacuum leak caused by a cracked rubber intake duct.[http://forums.roadfly.com/forums/bmw/bmw-3-series-e46/8894117-1.html](http://forums.roadfly.com/forums/bmw/bmw-3-series-e46/8894117-1.html) And a photograph of the defective intake duct: [http://forums.roadfly.com/forums/bmw/bmw-3-series-e46/8894122-1.html](http://forums.roadfly.com/forums/bmw/bmw-3-series-e46/8894122-1.html) ---
**Author:** ![DesignLLC](https://avatars.discourse-cdn.com/v4/letter/d/59ef9b/32.png) [@DesignLLC](https://community.cartalk.com/u/DesignLLC)\ **Post date:** [March 18, 2010, 3:14am UTC](https://community.cartalk.com/t/engine-light-keeps-coming-on/35468/10 "2010-03-18T03:14:48Z")
hello – I located small crack in an intake hose - I changed this $ 16.- hose and the light stayed off