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 the car's computer found a problem with a part that helps control the engine's air flow on one side of the engine. It's like a spring isn't working right to open a door that lets air in.
The code P16BB is triggered when the Engine Control Module (ECM) detects a failure in the throttle valve actuator spring test for Bank 2. This actuator is responsible for controlling the throttle valve's position.
The throttle valve actuator is an electronic component that controls the opening and closing of the throttle valve, which regulates the amount of air entering the engine. The ECM performs a start test to ensure the spring inside the actuator functions correctly. If the spring fails to operate as expected, the ECM will log the P16BB code for Bank 2, indicating an issue with the throttle valve actuator's ability to return to its default position.
• Check Engine Light is on
• Reduced engine performance
• Engine may stall or hesitate
• Faulty throttle valve actuator
• Wiring issues or poor connections
• ECM/PCM software issues
Throttle Valve: A component that regulates air flow into the engine.
Actuator: A device that moves or controls a mechanism or system.
• Use an OBD-II scanner to confirm the code.
• Inspect the throttle valve actuator and its wiring for damage.
• Test the actuator's functionality with a multimeter.
• Replace the faulty throttle valve actuator.
• Repair or replace damaged wiring or connectors.
• Update the ECM/PCM software if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $600
Moderate
• Chevrolet Silverado
• GMC Sierra
• Cadillac Escalade
• Regular maintenance and inspection of the throttle system
• Ensure all electrical connections are secure
• Keep the throttle body clean
Engine Performance
• Seek professional diagnosis if unsure.
• Avoid driving with reduced performance for long periods.
• Regularly check for updates on vehicle recalls or software updates.
Check with your vehicle manufacturer for warranty coverage on the throttle valve actuator.
This code has been known to appear in vehicles with electronic throttle control systems, especially in models with high mileage.
Moderate – It is advisable to address this issue soon to avoid potential engine performance problems.
Driving with a malfunctioning throttle actuator can lead to reduced engine performance and potential safety hazards.
• Engine at operating temperature
• Vehicle in idle or low-load conditions
The throttle valve actuator is typically located on the throttle body, which is mounted on the intake manifold.
Q: Can I drive with a P16BB code?
A: It's possible to drive short distances, but it's recommended to fix the issue soon to prevent further engine performance problems.
Q: How do I clear a P16BB code?
A: After repairs, use an OBD-II scanner to clear the code. Ensure the issue is resolved to prevent the code from returning.
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Fitment Required · Vehicle-fitment part
Relevant for airflow, fuel-trim, and intake-metering faults after confirming the sensor is actually at fault.
Airflow and fuel-trim codes can involve the mass air flow sensor after proper diagnosis.
Verify the sensor design and fitment for your exact vehicle.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.