hannesvogel4
XC60 high fuel consumption starting difficulty
Summary of the thread
A 2014 Volvo XC60 with a gasoline engine is experiencing high fuel consumption and starting difficulties at 223,612 km. Diagnostic scans suggest a defective throttle valve, but the owner suspects the accelerator pedal module might be the issue. After replacing the accelerator pedal module, the problems were resolved, indicating it was the source of the issues.
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4 comment(s)
hannesvogel4 (community.author)
Thanks for the input. I did a quick visual inspection for vacuum leaks, but didn't find anything obvious. The MAF sensor readings seem within normal parameters according to my scanner. The engine idle is somewhat erratic, fluctuating slightly more than usual. Any more details on your Audi experience? Did the diagnostics also point you directly to the throttle valve?
juliuslion1
Yeah, the diagnostics on my Audi initially flagged the throttle position sensor. We even tried cleaning the throttle body thoroughly (which helped marginally for a few days), but the problem kept resurfacing. Eventually, after much head-scratching, the workshop determined it was indeed the throttle valve needing replacement. Considering your erratic idle, fluctuating fuel consumption and error codes pointing that way, I'd suggest getting a professional diagnosis rather than chasing ghosts. Bit the bullet and had it replaced. If that is indeed the source of the issues I'd expect repair cost around 205€ including parts.
hannesvogel4 (community.author)
Appreciate the detailed response. I'll take your advice and schedule a proper inspection at a trusted workshop. Turns out, the accelerator pedal module was indeed defective. Replaced it and everything's running smoothly now.
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VOLVO
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XC60
juliuslion1
Whoa, that sounds eerily familiar. I had nearly identical symptoms on my old 2012 Audi A4. High fuel consumption, rough starts...it was a nightmare! Did you check for any vacuum leaks around the intake manifold or any issues with the MAF sensor? It's a long shot, but sometimes weird readings there can cause the throttle to act up. Is the engine idle stable, or does it fluctuate?