P0647 2016 Chevrolet Silverado Code - Air Conditioning Compressor Clutch Relay Control Circuit High Voltage
Quick Answer
When the Air Conditioning (A/C) switch is pressed, the Heating, Ventilation, and Air Conditioning (HVAC) control module sends an A/C request message to the Engine Control Module (ECM) via serial data. Common causes include Faulty Air Conditioning (A/C) Compressor Clutch Relay, Air Conditioning Compressor Clutch Relay harness is open or shorted, Air Conditioning Compressor Clutch Relay circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
- What it means
- P0647 2016 Chevrolet Silverado indicates Air Conditioning Compressor Clutch Relay Control Circuit High Voltage.
- Common causes
- Common causes include Faulty Air Conditioning (A/C) Compressor Clutch Relay, Air Conditioning Compressor Clutch Relay harness is open or shorted, Air Conditioning Compressor Clutch Relay circuit poor electrical connection.
- Severity
- Low - monitor the vehicle and repair when practical.
- Can I drive?
- The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
Code P0647 2016 Chevrolet Silverado Description
What are the Possible Causes of the DTC P0647 2016 Chevrolet Silverado?
- Faulty Air Conditioning (A/C) Compressor Clutch Relay
- Air Conditioning Compressor Clutch Relay harness is open or shorted
- Air Conditioning Compressor Clutch Relay circuit poor electrical connection
- Faulty Air Conditioning Compressor Clutch
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0647 2016 Chevrolet Silverado?
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 P0647 2016 Chevrolet Silverado 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.
Need more information about the P0647 2016 Chevrolet Silverado code?
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Frequently Asked Questions about P0647 2016 Chevrolet Silverado Code
1. What does the OBDII code P0647 mean on a 2016 Chevrolet Silverado?
P0647 indicates a high voltage issue in the air conditioning compressor clutch relay control circuit, which may affect the AC system's operation.
2. What are the common symptoms of code P0647 on a 2016 Silverado?
Symptoms may include the air conditioning not working, the AC compressor not engaging, or an illuminated Check Engine Light.
3. What causes the P0647 code to appear on a 2016 Chevrolet Silverado?
Common causes include a faulty AC compressor clutch relay, damaged wiring or connectors in the circuit, or a malfunctioning powertrain control module (PCM).
4. How can I diagnose the P0647 code on my 2016 Silverado?
Start by inspecting the AC compressor clutch relay, wiring, and connectors for damage or corrosion. Use a multimeter to check for excessive voltage in the circuit.
5. Can I still drive my 2016 Silverado with a P0647 code?
Yes, you can drive the vehicle, but the air conditioning system may not function properly, which can be uncomfortable in hot weather.
6. How do I fix the P0647 code on a 2016 Chevrolet Silverado?
Repairs may involve replacing the AC compressor clutch relay, repairing damaged wiring or connectors, or, in rare cases, reprogramming or replacing the PCM.
7. How much does it cost to fix the P0647 code on a 2016 Silverado?
Repair costs can vary, ranging from $50–$200 for relay or wiring repairs, and up to $1,000 or more if the PCM needs replacement.
8. Can a blown fuse cause a P0647 code on a Chevrolet Silverado?
Yes, a blown fuse in the AC compressor clutch circuit can lead to high voltage and trigger the P0647 code.
9. Will clearing the P0647 code fix my AC system on a 2016 Silverado?
Clearing the code without addressing the root cause is only a temporary solution. The issue will likely return until proper repairs are made.
10. Is the P0647 code specific to Chevrolet Silverados?
No, P0647 is a generic OBDII code that can appear on various vehicles, but its specific causes and symptoms may vary by make and model.
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