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 is having trouble figuring out how fast the engine should be running, which can make the car act funny.
This code indicates a problem with the electronic throttle control system, specifically related to engine speed calculations.
The P1681 code is triggered when the Engine Control Module (ECM) detects an error in the engine speed calculation from the electronic throttle control system. This can affect how the engine responds to throttle inputs, potentially causing performance issues.
• Engine stalling or hesitation
• Reduced engine power
• Check Engine Light illuminated
• Faulty throttle position sensor
• Wiring issues in the throttle control circuit
• Malfunctioning ECM
ECM: Engine Control Module
Throttle Position Sensor: A sensor that monitors the position of the throttle in the engine
• Use an OBD-II scanner to confirm the code.
• Inspect the throttle position sensor and its wiring.
• Test the ECM for proper function.
• Replace the throttle position sensor if faulty.
• Repair or replace damaged wiring in the throttle control circuit.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Screwdriver set
$150 - $600
Moderate
• Chevrolet Silverado
• GMC Sierra
• Cadillac Escalade
• Regular maintenance of the throttle body.
• Ensure proper electrical connections.
• Keep the ECM software updated.
Engine Performance
• Avoid driving the vehicle until repaired to prevent further damage.
• Consult with a professional mechanic for accurate diagnosis.
Check with your vehicle manufacturer for warranty coverage on electronic components.
This code has been associated with throttle control issues in vehicles with electronic throttle systems.
Moderate – It should be addressed soon to prevent potential drivability issues.
Ignoring this code can lead to unsafe driving conditions. Always address engine performance issues promptly.
• Engine running
• Vehicle in park or neutral
The electronic throttle control system is typically located near the engine intake manifold.
Q: Can I drive my car with a P1681 code?
A: It's not recommended as it may lead to reduced engine performance or stalling.
Q: What happens if I ignore the P1681 code?
A: Ignoring the code can lead to further engine performance issues and potential safety hazards.
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