Help, Advice, Owners' Discussion and DIY Tutorials on Volvo XC90s. The XC90 proved to be very popular, and very good for Volvo's sales numbers, since its introduction in model year 2003 (North America).
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- Year and Model: 2006 volvo xc90 v8
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******FIX******** Have a 2006 xc90 v8 with identical condition with code p0506 indicating can't reach target idle. The code after clearing would only return if left in gear with brake held tight. My engine in park was at approx. 700 rpm when in gear with brake tight 500 rpm with the engine trying to drive through the brake. Contacted our local dealer 2 hrs away, asked them to check if the software or transmission are out of wack for this vehicle as it was a recent auction car. 1 week and $250 in diag time the idea was to replace throttle body (est. 900). Due to being used volvo specialized dealer I opted to swap from a known good car. DID NOT CHANGE ANYTHING. I changed out the valve body in the trans due to fact volvos experience heavy wear in the valves of the trans not usually the trans it self. NO CHANGE. Decided to get a used transmission. **********FIXED********** As suspected the problem had nothing to do with the idle condition the problem was with the torque converter of the transmission causing a lower engagement idle (stall speed) than the vehicle was designed for making the engine module think it needed to do all it could to raise the idle. This would be the same as putting in gear, holding the brake and stepping on the gas. Important note:These forums seem to be great at sharing the strange problem modern cars have, yet we have to remember to take as much time sharing the fix as these new vehicles are very difficult to figure out and even the dealers have no idea either. Modern cars are great but we need to have a lot of understanding to survive.
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- Year and Model: S60 2003
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Appreciate the feedback. This topic may go into the repairs section.
2003 2.4i S60 automatic 125k miles
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- Year and Model: 2004 V70R GT, et al
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That sounds like the TCC (torque converter clutch) is being applied to some degree. The TCC solenoid could cause this as could a problem with the TC flow control valve. TCC is applied by reversing fluid flow through converter that is for cooling.
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- Year and Model: 2006 S60 2.5T FWD
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It's approaching levels of skill and understanding that 30 years ago would have rivaled the knowledge of an airline engineer/mechanic (Several technical AS culminating with a Masters degree). A two year ASE 'crash course' simply doesn't cut it anymore unless you mostly aspire to balance tires and perform brake jobs.
Is there a theory as to why this issue seems to affect XC90s and not other models fitted with the TF80-SC? Which is pretty much any Volvo 2005+ equipped with a 6-speed AT.
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