What it means
The throttle actuator on bank 2 cannot move because of ice formation - typical for very cold ambient temperature with humid intake. Engine de-ices on warm-up.
At a glance
- Usually lights the check-engine light
- Affects emissions; the car can fail an emissions test
How it works
The throttle actuator controls airflow through the throttle on bank 2 of an engine with separate bank-specific throttle control. The module sets this code when the bank 2 throttle plate cannot move as expected because ice is obstructing the throttle body or intake; it may clear after the engine warms.
Common causes
Most likely first.
- Ice obstructing the throttle bore or plate
- Moisture buildup in the throttle body or intake
Symptoms
- Check engine light on
- Possible reduced throttle response or reduced engine power
How to diagnose it
- Review freeze-frame data for the ambient and intake conditions when the code set, especially very cold, humid conditions that can promote icing.
- Check whether reduced throttle response or power improves as the engine and intake warm, without revving or loading a poorly responding engine.
- With the engine off and cool, inspect the bank 2 throttle bore and plate for visible ice or moisture; do not force the plate.
- Inspect the bank 2 throttle body and nearby intake for moisture accumulation, blocked drainage, or conditions that could direct water into the intake.
- If the fault remains after thawing, check the bank 2 throttle actuator operation and related wiring against the manufacturer's specifications.
Common fixes
- Allow the intake and bank 2 throttle body to thaw safely before restarting or driving.
- Remove the source of moisture entering or collecting in the bank 2 intake.
- Repair a confirmed bank 2 throttle actuator wiring or connector fault.
- Replace or repair the bank 2 throttle body or actuator if testing shows it remains unable to move correctly.
Can I keep driving?
If throttle response or power is reduced, avoid traffic, steep roads, and other situations where sudden acceleration may be needed; stop somewhere safe if control is unreliable. Do not continue driving if the engine cannot respond predictably, since this code can involve a sticking bank 2 throttle.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.