Omega Owners Forum

Omega Help Area => Omega Electrical and Audio Help => Topic started by: Johnny English on 22 July 2014, 06:38:44

Title: Knock sensor failure?
Post by: Johnny English on 22 July 2014, 06:38:44

Hi all, sometimes  EML is spontanously on, knock sensor low voltage, the connections seem good though...is there any other way to check them or do I have to swap at once? Really annoying that I cant accelerate usually when I need to do it most. Any advice welcomed!

Laszlo,  Hungary

Title: Re: Knock sensor failure?
Post by: TheBoy on 22 July 2014, 17:37:52

Its usually a damaged wire. Bank 135 is normally snagged the aux belt or alternator, Bank 246 normally seems to be caught under cam cover following a cam cover gasket change.

The wire can be repaired, but a bit awkward as its coax

Title: Re: Knock sensor failure?
Post by: Johnny English on 22 July 2014, 20:43:13

Thx TB !  :y

Title: Re: Knock sensor failure?
Post by: Marks DTM Calib on 23 July 2014, 16:36:01

Also, if the fault code is against the 1-3-5 bank and the wiring check out ok then check the alternator bearings, I have seen the odd occasion where badly worn bearings cause the knock sensor to be incorrectly triggered.

Title: Re: Knock sensor failure?
Post by: Johnny English on 25 July 2014, 15:34:29

Fault code was "knock signal 2" , after an accurate examination I found three (!) wounded points on the cable next the aux belt. Fixed, I'm gonna check it tomorrow during a short, 50 km trip. I would add, that ECU gave a plus code as surprise, it was MAF sensor low voltage.  :-\ Whether it could be triggered by a faulty knock sensor cable?  ::)

Title: Re: Knock sensor failure?
Post by: TheBoy on 26 July 2014, 11:51:43

Ignore the MAF code until all other faults are fixed :y

Title: Re: Knock sensor failure?
Post by: Johnny English on 27 July 2014, 20:56:16

Fixed! No more fault code anymore  :y 

Thank you very much , guys!

Laz