P1153 Code: Bank 2 Fuel Control Shifted Lean
🟠 Moderate severity · drivable
Drivable, but bank 2 runs lean, which can cause hesitation, rough running, and higher fuel use.
What P1153 means
The computer has pushed the fuel correction on bank 2 as far as it can, but the mixture is still lean — too much air, not enough fuel. Something outside the computer's control, like a leak or a weak fuel supply, is pulling that side of the engine lean.
Symptoms
- Check engine light is on
- Rough idle or hesitation
- Loss of power
- Poor fuel economy
- Failed emissions test
Common causes
- most common: Vacuum leak on the bank 2 side
- common: Exhaust leak before the sensor
- common: Dirty or faulty MAF sensor
- less common: Clogged fuel injector on bank 2
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Find and fix vacuum leaks | Yes | $0–100 |
| Clean the MAF sensor with MAF cleaner | Yes | $8–15 |
| Service or replace fuel injectors | Mechanic | $150–400 |
Frequently asked questions
Can I drive with a P1153 code?
Yes, but the lean mixture on bank 2 can cause hesitation and poor economy. Have it diagnosed soon.
What does "fuel control shifted lean" mean?
It means the computer has added all the fuel it's allowed to, but bank 2 still runs lean, pointing to a mechanical problem like a leak.
How much does it cost to fix P1153?
Leak repairs can be free to $100. Injector service is more, at $150–$400.
Related codes
P0174
P0174 Code: System Too Lean (Bank 2)
P1151P1151 Code: Lack of HO2S21 Switch – Sensor Indicates Lean
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.