2000 Alfa Romeo 156 2.5 auto

mike ilaya
4 points

Problem added: May 11, 2011 (9 years ago)
the speedometer only indicates half of the actual speed. So when I am driving of about 80 km/hour the dial only shows 40 km/hour.

Car details
Car: Alfa Romeo 156
Variant: 2.5 auto
Model Year: 2000
Category: Electrics, ECU, Warnings & Lights
Replies and Fixes
Top Fixer
148 points

May 11, 2011 (9 years ago)
Tha sounds typical of a flamboyant alfa, trying to make you drive faster! My alfa 33 used to overtake nearly everything on the motorway when the speedo read 60mph.

I think the first thing would be to check the cable, they tend to fray inside the sheath and then not rotate properly. If the speedo needle is sticking and quivering this would point towards you needing a new speedo cable.
15,271 points

May 11, 2011 (9 years ago)
Could check your VSS ( vehicle speed sensor ) and wiring .
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