One problem related to service engine light on has been reported for the 2017 Ford Focus. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2017 Ford Focus based on all problems reported for the 2017 Focus.
There was a recall 18s32 campaign fuel tank deformation issued late 2018. The pcm system was not adequately detecting a stuck open canister purge value. On August 24th, 2019 I took my vehicle to get the recall repair due to stalling without notice and dangerous in drivability concerns. On August 25th, the following day, I had the very same exact symptoms. I took it to pepboys to diagnose, and the same codes were populating for the recall. Pepboys advised to take it back to a dealer. I then took it to another Ford dealership on October 22nd for a second opinion, and they stated that the canister purge valve was sticking. On October 24th, the vehicle was returned back to me and within a couple of hours same symptoms. On Nov 5th, 2019, I was advised the canister purge valve was replaced after the parts were on bo for 2-3 weeks. However, car started driving the very exact way followed by service engine light and transmission overheating warning. Additionally, the car did not accelerate when attempting to make a left turn and a diesel had to swiftly hit on their breaks to prevent crashing into me. The vehicle was returned back on the 8th of November, however, dealership stated they were unable to duplicate concern. On November 13, the vehicle was picked up and on November 14th I had to take it back due to the same issues. On November 30, I was advised that they notice a clutch slipping, vehicle rev high when trying to reverse or accelerate. However, vehicle operating as design. This is not the case. After 6 attempts in trying to rectify this issue, it is not. My safety is a concern here as the vehicle is not operating as design and currently remains as is.