Re: Vauxhall Astra 05 coolant level light comes on had it...
Have a coolant system pressure test carried out to find out if there are any leaks in the system also replace the coolant pressure sensor as it may be faulty.
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Your code 21 is just telling you that your left sidelight is out. The shaking and juddering is a different issue and needs a pro grade scan tool computer to see which sensor needs replacing.
21
Failure of left sidelight.
this is normal practice to protect the engine /transmission from costly repairs. Run the fault codes to find which sensor is activated. Check all fluid levels (coolant at the radiator cap). Fix the fault and use a scanner to reset the light.
Assuming coolant level is ok the fault must surely be on the sensor side. Check wiring thoroughly, including cleanliness, terminal connections, continuity, damage, etc.. I would recommend plugging in the OBD 2 code scanner to see if you get a code fault. Also, the new sensor could be faulty (unlikely but possible) or the wiring at the back of the dashboard could be a poor connection (particularly if there is other dashboard issues). In my experience it will be something simple like a bad, dirty or corroded connection in the wiring terminals. As long as the coolant level is ok its just a minor issue!
Finding the fault code will not clear the problem if you reset the system without finding the cause the light will just come on again or the fault code will not clear.
Anything related to brakes should be checked out by a garage/mechanic and not ignored.
Its probably just an abs sensor failed but its better to be safe than sorry.
Sorry for the lecture but I wouldnt like to see anyone hurt due to brake system failure.
Hi can someone point me in the right direction iv got a vauxhall zafire b mkll and my engine management light come on so I went and ad it check and the code was p0171 bank 1 running lean so he sed your oxygen sensor so I got a bran new one and put it on about a month ago and yesterday it's my engine management light back on with same code agen any help would be great thanks
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