Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that there's a problem with the part of the car that controls how much air goes into the engine. It's like if the lid on a jar doesn't open and close properly.
The P161E code indicates that the throttle valve actuator spring test has failed on bank 2 of the engine. This is part of the system that controls the air intake into the engine.
The throttle valve actuator is responsible for controlling the throttle plate in the throttle body. The spring test checks the return spring's ability to bring the throttle plate back to its default position when not being electronically controlled. A failure in this test means the spring might be weak or broken, affecting throttle response.
• Check Engine Light is on
• Poor engine performance
• Inconsistent throttle response
• Faulty throttle valve actuator
• Damaged or weak throttle return spring
• Electrical issues in the throttle actuator circuit
Throttle Valve Actuator: A device that controls the position of the throttle plate.
Bank 2: Refers to the side of the engine opposite to bank 1, typically on V-type engines.
• Use an OBD-II scanner to confirm the code.
• Inspect the throttle valve actuator and spring for damage.
• Check the electrical connections and wiring to the actuator.
• Replace the throttle valve actuator if faulty.
• Repair or replace the throttle return spring.
• Fix any electrical issues in the actuator circuit.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $600
Moderate
• BMW 3 Series
• Audi A4
• Mercedes-Benz C-Class
• Regularly inspect the throttle body and actuator.
• Ensure electrical connections are secure.
• Perform routine maintenance checks.
Engine Performance
• If you notice poor acceleration, have your vehicle checked.
• Address any check engine light issues promptly to avoid further damage.
Check with your vehicle manufacturer for warranty coverage on engine components.
This code has been more common in vehicles with electronic throttle control systems introduced in the early 2000s.
Moderate – It should be addressed soon to prevent further engine performance issues.
Ignoring this code may lead to reduced vehicle performance and potential safety risks.
• Engine at operating temperature
• Vehicle in a safe, stationary position
The throttle valve actuator is located on the throttle body, typically near the intake manifold.
Q: What happens if I ignore this code?
A: Ignoring this code can lead to poor engine performance and potential safety issues.
Q: Can I drive with this code?
A: It's possible to drive with this code, but it's not recommended as it can affect engine performance and fuel efficiency.
Specialty · Vacuum pump and bleeder
Useful for vacuum checks, actuator testing, and some brake or emissions diagnostics.
Useful for testing vacuum-operated components and some bleeding procedures.
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Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for verifying supporting electrical signals while testing the system.
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Universal · Socket set
A practical metric and SAE socket set for many diagnostic teardowns and component replacements.
Useful for access and removal work during diagnosis.
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