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headlight adjustment faulty error


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My new 4s (2005) has been standing still for a couple of months with a dead battery. Now that I have new battery I keep getting the message: headlight adjustment faulty. When I powerstarted the car I immediately got the message. After 10 minutes, the warning disappeared. When the new battery got installed I did not see the message anymore for 8 starts. Now it is back again and quite consistent (started the car 15 times and everytime the message appeared. Sometimes the message goes away after 10 minutes or so, but most of the time it stays on.

When I start the car, I see the lights go down first before getting to the correct level, so the adjustment motors work fine. What could be causing this error message? I am also puzzled that I do not get the message everytime. Could there be a programming issue or a loose cable? Any ideas??

Thanks, frank

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  • 6 months later...
My new 4s (2005) has been standing still for a couple of months with a dead battery. Now that I have new battery I keep getting the message: headlight adjustment faulty. When I powerstarted the car I immediately got the message. After 10 minutes, the warning disappeared. When the new battery got installed I did not see the message anymore for 8 starts. Now it is back again and quite consistent (started the car 15 times and everytime the message appeared. Sometimes the message goes away after 10 minutes or so, but most of the time it stays on.

When I start the car, I see the lights go down first before getting to the correct level, so the adjustment motors work fine. What could be causing this error message? I am also puzzled that I do not get the message everytime. Could there be a programming issue or a loose cable? Any ideas??

Thanks, frank

hi frank, know it's been a while, but my 06 c4s has recently developed very similar symptons to your car last year "headlight beam adjustment faulty". just wondered how you fixed the problem.

many thanks lensta

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  • 3 years later...

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