P16D7 GMC Code - Sensor Supply Voltage Relay Control Circuit
Quick Answer
The Reductant Control Module Relay 1 & 2 supply ignition voltage to the Reductant Control Module. Common causes include Faulty Reductant Control Module Relay, Reductant Control Module Relay harness is open or shorted, Reductant Control Module Relay circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P16D7 GMC indicates Sensor Supply Voltage Relay Control Circuit.
- Common causes
- Common causes include Faulty Reductant Control Module Relay, Reductant Control Module Relay harness is open or shorted, Reductant Control Module Relay circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P16D7 GMC Description
The Diagnostic Trouble Code (DTC) will be set when the ECM detects an open circuit, short to voltage or short to ground on the Reductant Control Module Relay control circuit.
What are the Possible Causes of the DTC P16D7 GMC?
- Faulty Reductant Control Module Relay
- Reductant Control Module Relay harness is open or shorted
- Reductant Control Module Relay circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P16D7 GMC?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P16D7 GMC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P16D7 GMC Code
1. What are the common symptoms of OBDII code P16D7 in a GMC vehicle?
- Common symptoms include rough idling, engine stalling, reduced fuel efficiency, and illumination of the Check Engine Light.
2. What does the OBDII code P16D7 GMC indicate?
- The code P16D7 indicates a malfunction in the Sensor Supply Voltage Relay Control Circuit in a GMC vehicle.
3. What are the possible causes of OBDII code P16D7 in a GMC vehicle?
- Potential causes include a faulty sensor supply voltage relay, damaged wiring or connectors in the circuit, or a malfunctioning sensor.
4. How can I diagnose the Sensor Supply Voltage Relay Control Circuit issue related to code P16D7 in my GMC vehicle?
- You can use a multimeter to test the voltage at the relay, inspect the wiring and connectors for any damage, and check for proper sensor operation.
5. Will driving with the OBDII code P16D7 in a GMC vehicle cause further damage?
- Continuing to drive with this code may lead to poor engine performance and potential damage to other components, so it is recommended to address the issue promptly.
6. How can I repair the Sensor Supply Voltage Relay Control Circuit problem causing code P16D7 in my GMC vehicle?
- Repair involves replacing the faulty sensor supply voltage relay, repairing any damaged wiring or connectors, and ensuring proper sensor functionality.
7. Can the OBDII code P16D7 be triggered by a loose connection in the sensor supply voltage circuit?
- Yes, a loose or poor connection in the circuit can disrupt the supply voltage to the sensor, leading to the triggering of the P16D7 trouble code.
8. Is it safe to reset the Check Engine Light after addressing the OBDII code P16D7 in my GMC vehicle?
- Yes, once the issue causing the code P16D7 is resolved, it is safe to reset the Check Engine Light using an OBDII scanner to clear the error code.
9. Are there any preventive maintenance steps to avoid OBDII code P16D7 in a GMC vehicle?
- Regularly inspecting and maintaining the sensor supply voltage relay, wiring, and connectors can help prevent issues that may trigger the P16D7 trouble code.
10. How long does it typically take to repair the Sensor Supply Voltage Relay Control Circuit problem associated with code P16D7 in a GMC vehicle?
- The repair time can vary depending on the exact cause of the issue, but it may take anywhere from 1 to 3 hours to diagnose and fix the problem.
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