A vacuum leak on the bank 2 side of the intake manifold, such as a cracked intake gasket or a deteriorated vacuum hose.; A dirty or failing mass airflow sensor that under-reports airflow, causing the computer to command too little fuel.; A weak or clogged fuel injector on one or more bank 2 cylinders, restricting fuel delivery under load.; A failing fuel pump or restricted fuel filter that cannot maintain pressure during high-demand conditions.; An exhaust leak upstream of the bank 2 oxygen sensor, allowing outside air to skew the sensor reading.; A faulty bank 2 oxygen sensor that is slow to respond or reading incorrectly under load.; A PCV valve or hose that is stuck open or leaking on the bank 2 side, admitting unmetered air.

DTC codes / P21xx · Fuel and air metering / P2193

P2193System Too Lean at Higher Load (Bank 2)

Q: What does code P2193 mean?

System Too Lean at Higher Load (Bank 2). P2193 means the engine computer has detected a lean condition on bank 2 — the side of the engine that does not contain cylinder number one — specifically when the engine is under higher load, such as during acceleration or climbing a hill. The computer compares the oxygen sensor readings against the fuel trims it has commanded and sees that bank 2 is running with too much air or too little fuel for the conditions.

P2193 means the engine computer has detected a lean condition on bank 2 — the side of the engine that does not contain cylinder number one — specifically when the engine is under higher load, such as during acceleration or climbing a hill. The computer compares the oxygen sensor readings against the fuel trims it has commanded and sees that bank 2 is running with too much air or too little fuel for the conditions.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaFuel and air metering

Symptoms you may notice

Often no symptoms besides the warning light, especially if the lean condition is mild or intermittent.
Hesitation or a slight stumble during acceleration or when climbing a grade.
Reduced engine power or a lack of response when the throttle is pressed firmly.
Rough idle or uneven running that may be more noticeable when the engine is cold.
Occasionally a flashing check engine light if the lean condition becomes severe enough to risk misfire.
Poor fuel economy as the computer tries to compensate by adding fuel.

Common causes, most likely first

A vacuum leak on the bank 2 side of the intake manifold, such as a cracked intake gasket or a deteriorated vacuum hose.
A dirty or failing mass airflow sensor that under-reports airflow, causing the computer to command too little fuel.
A weak or clogged fuel injector on one or more bank 2 cylinders, restricting fuel delivery under load.
A failing fuel pump or restricted fuel filter that cannot maintain pressure during high-demand conditions.
An exhaust leak upstream of the bank 2 oxygen sensor, allowing outside air to skew the sensor reading.
A faulty bank 2 oxygen sensor that is slow to respond or reading incorrectly under load.
A PCV valve or hose that is stuck open or leaking on the bank 2 side, admitting unmetered air.

How to diagnose and fix it

Connect a scan tool and record live data for bank 2 short-term and long-term fuel trims at idle and under load to confirm the lean condition.
Visually inspect all intake and vacuum hoses on the bank 2 side for cracks, loose clamps, or disconnected lines, and listen for hissing sounds.
Perform a smoke test on the intake system to pinpoint vacuum leaks that are not visible to the eye.
Check fuel pressure and volume under load using a fuel pressure gauge, comparing against the manufacturer's specification.
Test the bank 2 oxygen sensor response with a scan tool or oscilloscope to see if it switches rapidly and correctly when the mixture is artificially enriched.
Remove and inspect the bank 2 fuel injectors for clogging or poor spray pattern, and clean or replace as needed.
Clean the mass airflow sensor with a dedicated cleaner and verify its readings against expected values under load.

Before you replace the bank 2 oxygen sensor

A lean code at higher load often points to a fuel delivery problem rather than a vacuum leak, because vacuum leaks tend to affect idle more than load.
The bank 2 oxygen sensor is frequently replaced unnecessarily when the real cause is a weak fuel pump or a clogged fuel filter that only shows up under demand.
An exhaust leak between the cylinder head and the upstream oxygen sensor can pull in outside air and create a false lean reading that mimics a fuel problem.
A dirty mass airflow sensor can cause lean codes on both banks, but bank 2 may set first if that side of the intake is slightly more restricted.
Fuel trims that are normal at idle but climb under load are a strong clue that the problem is fuel volume, not unmetered air.

Can I keep driving with P2193?

You can usually drive the vehicle short distances at light throttle to a repair shop, but avoid hard acceleration, towing, or sustained high-speed driving until the fault is fixed. A persistent lean condition under load can raise combustion temperatures and damage the catalytic converter or exhaust valves over time.

Tools that help

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Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.