Having problems with your 2001 Toyota Corolla ?
2001 Toyota corolla hesitates on acceleration
\015 The check engine light comes on. The code PO171 Lean on bank one\015\012I cleaned the MAF sensor and put injector cleaning fluid in the gas tank to no avail.I am stumped.\015
Basically this means that an oxygen sensor in bank 1 detected a lean condition (too much oxygen in the exhaust).
Also a bad o2 sensor at bank 1 if its running fine that's where id start.
Repair Help & Product Troubleshooting for 2001 Toyota Corolla
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.