Thread: Knock Sensor #4
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Old 09-25-2007, 07:41 PM
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sc 540i sc 540i is offline
Location: CT
Join Date: Apr 2006
Posts: 1,343
Mein Auto: 540/6 Sport
Originally Posted by cn90 View Post
Was the knock sensor installed BACKWARD???

1228 Knock Sensor 4 This code is set when Knock Sensor #4 has sent multiple signals or a break or short has occurred in the sensor or its wiring. Check the Knock Sensor and its wiring for defects. Check the grade of fuel being used (RON>91). Increase octane if necessary.
I'm pretty sure it wasn't the guy doing the work has built a couple bmw race cars, and did all the other work performed flawlessly. I run 93 always I might try to find somewhere that has 100 octane or run an octane booster.
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