Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer thinks the part that controls how much air goes into the engine is stuck and not moving properly.
This code indicates that the throttle valve, which regulates air intake to the engine, is not moving as expected on Bank 2.
The P16D1 code is set when the Engine Control Module (ECM) detects that the throttle valve on Bank 2 is not responding to commands or is stuck in a certain position. This can affect the air-fuel mixture and engine performance.
• Check Engine Light is on
• Poor engine performance
• Hesitation or stalling
• Dirty or clogged throttle body
• Faulty throttle position sensor
• Wiring issues or poor electrical connections
Throttle Body: A component that controls the amount of air entering the engine.
Throttle Position Sensor: A sensor that monitors the position of the throttle valve.
• Scan the vehicle for codes and freeze frame data.
• Inspect the throttle body and throttle position sensor.
• Check wiring and connections for damage or corrosion.
• Clean the throttle body to remove any carbon buildup.
• Replace the throttle position sensor if faulty.
• Repair or replace damaged wiring or connectors.
• OBD-II scanner
• Multimeter
• Throttle body cleaner
$150 - $500
Moderate
• Chevrolet Silverado
• GMC Sierra
• Cadillac Escalade
• Regularly clean the throttle body.
• Perform routine engine maintenance.
• Check electrical connections periodically.
Engine Performance
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional if unsure.
• Avoid driving the vehicle if it stalls frequently.
Check with the vehicle manufacturer for warranty coverage on throttle body components.
This code has been associated with throttle body issues in vehicles with electronic throttle control systems.
Moderate – Prompt attention is recommended to avoid further engine performance issues.
Driving with a malfunctioning throttle can lead to unsafe driving conditions. Address the issue promptly.
• Engine running
• Vehicle at operating temperature
The throttle body is located between the air filter and the intake manifold on the engine.
Q: Can I drive with a P16D1 code?
A: It's not recommended as it can lead to poor engine performance and unsafe driving conditions.
Q: How do I clear a P16D1 code?
A: After repairs, use an OBD-II scanner to clear the code, but ensure the issue is resolved first.
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