Speedo Shows ~6km/h too little? - Civinfo
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post #1 of 18 (permalink) Old 5th February 2019, 08:32 Thread Starter
 
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Shows ~6km/h too little?

Hi!

2006 Civic FK3 2.2CDTI Hatchback showing too little on the speedo; We have to drive in ~56km/h in the 50-zone to go 50km/h.
Is there a way to adjust this anywhere? I haven't seen anything in the menu about this, only the +/- 6C on the outside temperature adjustment :b


Kind regards
// Chris-Mario
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post #2 of 18 (permalink) Old 5th February 2019, 08:58
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All vehicle speedo's should over read, not under read vs the actual speed of the vehicle.

Are you running stock wheels and tyres?
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post #3 of 18 (permalink) Old 5th February 2019, 12:22
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Sounds like it is regular overreading; The easiest way to get an idea of true speed is with a GPS.

If you drive at a steady speed, see what the GPS gives you and you can work out a slight offset.

An over read is normal, as it's not permitted for the speedo to under read at all, manufacturers tend to err on the safe side and under read. with option wheels etc. this can be amplified.

Unfortunately, there isn't really an option for getting the speedometer calibrated - I did have a look in the UK to see if I could get the speedometer calibrated similarly to Police speedometers, but there isn't a service accessible to the general public that I've found.
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post #4 of 18 (permalink) Old 5th February 2019, 12:31
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The pre-facelift 8G Civics did over read by quite a margin. The post-facelift were better.
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post #5 of 18 (permalink) Old 5th February 2019, 14:19
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Put smaller wheels on it?
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post #6 of 18 (permalink) Old 5th February 2019, 18:14
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Quote:
Originally Posted by Kremmen View Post
The pre-facelift 8G Civics did over read by quite a margin. The post-facelift were better.
How bad were the pre faces? My facelift reads 3MPH over against a GPS reading.
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post #7 of 18 (permalink) Old 5th February 2019, 18:36
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I think it was 10%

One answer is to fit and configure a 'speedo healer'

Pottsy did post about that ages ago - if you search.
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post #8 of 18 (permalink) Old 5th February 2019, 22:58
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Quote:
Originally Posted by Kremmen View Post
I think it was 10%
That's about the error on OP's car. Normal?
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post #9 of 18 (permalink) Old 6th February 2019, 05:24
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That was how the 2006 - 2008 Civics were configured.
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post #10 of 18 (permalink) Old 12th February 2019, 21:15 Thread Starter
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Thank you all for your answers

I've checked vs. GPS, and in 50km/h (car speedo) I drive 56km/h steady (on the GPS)

The wheels on now are standard winter-rims/tyres; 205/50-16 (I think..? Or maybe around 205/55-16)
- but that's besides the point; Yes, they are the standard rated winter-size atleast. I drove it home on summer-rims/tyres when I got it and it showed the same on the 17" standards/OEMs
So it's kinda odd :b

But, I see the point of manufacturers "safeing" themselves against tons of lawsuits because "well my car said I only did x-amount of speed not my fault"

If it's normal and not to worry about, then alright

Thanks for the replies. Y'all amazing on here <3
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post #11 of 18 (permalink) Old 12th February 2019, 23:14
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If the car speedo reads less than the GPS speed, that's deffo wrong.
The car speedo, should read a bit higher than your GPS speed so that your actual speed (GPS) is slower than what your speedo says.
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post #12 of 18 (permalink) Old 13th February 2019, 09:25
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Quote:
Originally Posted by Das View Post
How bad were the pre faces? My facelift reads 3MPH over against a GPS reading.


My Type R also appears to read approx 3mph over.
Not sure if a 59 plate is facelift or not?


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post #13 of 18 (permalink) Old 13th February 2019, 09:43
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3mph for the MY09 facelift was normal. Honda did improve it.

Facelift has the sockets in the centre console, USB, etc.
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post #14 of 18 (permalink) Old 13th February 2019, 10:20
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Mine must’ve been an early 09 build then registered in October.
The reason I installed the double din was because it had no USB sockets like my old FN1


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post #15 of 18 (permalink) Old 13th February 2019, 11:18
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Quote:
Originally Posted by Chris-Mario Portale View Post
Thank you all for your answers

I've checked vs. GPS, and in 50km/h (car speedo) I drive 56km/h steady (on the GPS)

The wheels on now are standard winter-rims/tyres; 205/50-16 (I think..? Or maybe around 205/55-16)
- but that's besides the point; Yes, they are the standard rated winter-size atleast. I drove it home on summer-rims/tyres when I got it and it showed the same on the 17" standards/OEMs
So it's kinda odd :b

But, I see the point of manufacturers "safeing" themselves against tons of lawsuits because "well my car said I only did x-amount of speed not my fault"

If it's normal and not to worry about, then alright

Thanks for the replies. Y'all amazing on here <3
My old 2.2 pre-facelift at 61mph on the dash was 56mph on the GPS. I know all cars over read but does this mean that they also add too many miles as well? Maybe there's a boffin out there who can answer. I remember watching a documentary on the Manchester Constabulary traffic workshop and the first thing the do when preparing a police car is to calibrate the speedo to that it reads the actual, so plod's correct
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post #16 of 18 (permalink) Old 13th February 2019, 11:21
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We had a Honda tech on, years ago, who assured us that whilst the speedo was a tad inaccurate, due to legislation, the mileometer was absolutely correct.
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post #17 of 18 (permalink) Old 13th February 2019, 15:16
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Quote:
Originally Posted by nturnb View Post
I know all cars over read
No they don't. It seems that the OP's speedo under reads.
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post #18 of 18 (permalink) Old 13th February 2019, 15:31
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No they don't. It seems that the OP's speedo under reads.
Ok, I stand corrected
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