Toyota iQ Diesel Reduced Power After Chip Tuning

Reduced power on an iQ? Sounds familiar! I had something similar with mine (also diesel). Did you use a scan tool to pull the diagnostic code? What did it say?

Yes, a scan tool was utilized. The fault code indicated irregularities within the engine's fuel delivery system, potentially linked to the aftermarket chip tuning. Did your issue stem from a similar modification?

Bingo! My iQ had the same symptoms after a remap. The tuner messed something up, and the engine started throwing codes. It never ran right until I had it professionally looked at. I'd recommend finding a workshop with experience in this kind of issue.

I appreciate the confirmation. Your experience validates my suspicion. I will consult with a qualified workshop to address the potential complications arising from the chip tuning. Repair costs are estimated around 180€.