Having problems with your 1986 Ford Bronco II ?
Emmissions light came on during cold snap - 1986 Ford Bronco II
Bad or weak o2 sensors will do this. check the codes with a scanner. replace o2 sensors that say they caused the codes
Repair Help & Product Troubleshooting for 1986 Ford Bronco II
Tips for a great answer:- Provide details, support with references or personal experience .
- If you need clarification, ask it in the comment box .
- It's 100% free, no registration required.