Post Catalyst Fuel Trim System Too Lean (Bank 2)
What it means
This code is the same as P2096 but on bank 2, the side of a V engine that does not contain cylinder 1. The engine computer has found that the oxygen sensor after the catalytic converter on this bank keeps reading lean until the correction reached its limit.
Symptoms4
- Check engine light on, often with no other symptoms.
- Ticking from the bank 2 side of the exhaust if there is a leak.
- Sometimes a slight increase in fuel consumption.
- Failed emissions test.
Possible causes5
- Exhaust leak at the manifold or pipes ahead of the bank 2 downstream sensor.
- Faulty or slow bank 2 downstream oxygen sensor.
- Aged bank 2 upstream oxygen sensor.
- A real lean condition on bank 2 from an air leak near that bank's intake runners.
- Wiring or connector fault in the downstream sensor circuit.
How to diagnose5
- Read all stored codes; P2096 alongside it points to a shared cause such as low fuel delivery rather than a one-sided leak.
- Inspect the bank 2 exhaust from the manifold to the downstream sensor for leaks.
- Compare bank 2 sensor readings with bank 1 on a scan tool.
- Test both sensors' response to a sudden rich command to find a slow sensor.
- Inspect the downstream sensor wiring and connector.
How to fix5
- Repair the exhaust leak or replace the damaged gasket on bank 2.
- Repair the sensor wiring or connector.
- Replace the bank 2 downstream oxygen sensor if it is slow.
- Replace the bank 2 upstream sensor if its reading is proven biased.
- Clear the codes and confirm the trims return to normal.
Repair cost
In Saudi riyals; the highlighted part is the expected range for this fault.
The cost is low for a simple exhaust leak repair, and rises for a new oxygen sensor or when the bank 2 exhaust manifold is hard to reach.
Prices are rough estimates for common cars at independent workshops and vary with the car and the source of the part.
Prices last updated: September 2026
Frequently asked questions
Where is bank 2 on my engine?
On V engines it is the side that does not contain cylinder 1. Its position varies by vehicle, so check the service information for your car.
What does it mean if P2096 and P2098 appear together?
It usually means the cause is shared by both banks, such as low fuel pressure or a general air leak, rather than an exhaust leak on one side.
This guide is for information only and does not replace an inspection by a qualified technician. If the fault involves brakes, steering, engine temperature, electrics or refrigerant, do not attempt the repair yourself.
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