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 power supply to a sensor in your car. It's like when a toy doesn't work because the batteries are running low.
The P16FD code indicates that the vehicle's computer has detected an issue with the voltage or performance of the power supply to a specific sensor circuit, labeled 'B'.
The P16FD code is triggered when the Engine Control Module (ECM) detects a voltage level outside the expected range for the Sensor Power Supply 'B' circuit. This could be due to a short, open, or high resistance in the circuit, affecting the sensor's ability to function correctly.
• Check Engine Light illuminated
• Poor engine performance
• Unusual sensor readings
• Faulty sensor
• Damaged wiring or connectors
• Failed ECM or power supply module
ECM: Engine Control Module
OBD-II: On-Board Diagnostics, second generation
• Use an OBD-II scanner to confirm the code.
• Inspect wiring and connectors for damage.
• Test the sensor and power supply voltage.
• Replace or repair damaged wiring.
• Replace faulty sensor.
• Repair or replace ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $500
Moderate
• Chevrolet Silverado
• GMC Sierra
• Cadillac Escalade
• Regular maintenance checks
• Inspect wiring for wear and tear
• Ensure sensors are clean and functioning
Sensor Issue
• Address the issue promptly to avoid further damage.
• Consult a professional mechanic if unsure.
Check with your vehicle manufacturer for warranty coverage on sensors and ECM components.
This code has been associated with vehicles that have experienced wiring harness issues, especially in older models.
Moderate – It's important to address this issue to ensure proper sensor function and vehicle performance.
Ignoring this issue could lead to reduced vehicle performance and increased emissions, potentially violating emissions laws.
• Engine running
• Sensor circuit under load
The affected sensor is typically located in the engine bay, connected to the ECM via a wiring harness.
Q: Can I drive with a P16FD code?
A: It's not recommended to drive for extended periods with this code, as it may lead to further issues.
Q: How do I clear the P16FD code?
A: After repairs, use an OBD-II scanner to clear the code from the vehicle's computer.
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