P0651 2016 GMC Sierra Code - 5 Volt Reference 2 Circuit
Quick Answer
The P0651 diagnostic trouble code (DTC) for a 2016 GMC Sierra refers to a malfunction in the 5 Volt Reference 2 Circuit. Common causes include Damaged wiring or connectors in the 5 Volt Reference 2 Circuit, Faulty ECM, Short circuit in the circuit. 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
- P0651 2016 GMC Sierra indicates 5 Volt Reference 2 Circuit.
- Common causes
- Common causes include Damaged wiring or connectors in the 5 Volt Reference 2 Circuit, Faulty ECM, Short circuit in the circuit.
- 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.
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Code P0651 2016 GMC Sierra Description
The P0651 diagnostic trouble code (DTC) for a 2016 GMC Sierra refers to a malfunction in the 5 Volt Reference 2 Circuit. In modern vehicles, the Engine Control Module (ECM) provides a 5-volt reference signal to various sensors and components throughout the vehicle. This signal is crucial for proper operation and communication between different systems. When the ECM detects a fault in the 5 Volt Reference 2 Circuit, it triggers the P0651 code.
Common Causes of P0651 2016 GMC Sierra
- Damaged wiring or connectors in the 5 Volt Reference 2 Circuit
- Faulty ECM
- Short circuit in the circuit
- Malfunctioning sensor drawing excessive current
Symptoms of P0651 2016 GMC Sierra
- Engine misfires
- Rough idling
- Stalling
- Reduced fuel efficiency
- Limp mode activation
How to Fix P0651 2016 GMC Sierra
- Perform a thorough inspection of the wiring and connectors in the 5 Volt Reference 2 Circuit.
- Test the ECM to determine if it is functioning correctly.
- Check for any short circuits in the circuit and repair as necessary.
- Test each sensor connected to the 5 Volt Reference 2 Circuit to identify any malfunctions.
- Replace any damaged components and clear the DTC from the ECM.
Cost to Fix P0651 2016 GMC Sierra
The typical repair costs for addressing a P0651 code in a 2016 GMC Sierra can range from $200 to $500, including parts and labor. However, it's important to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Most auto repair shops charge between $80 and $150 per hour for labor, but rates may be higher in metropolitan areas or at dealerships, while independent shops often offer lower rates. It is advisable to obtain quotes from local shops to get a more accurate estimate for this repair.
Tech Notes for P0651 2016 GMC Sierra
The 5 Volt reference 2 circuit provides 5 Volt to the following sensors: (Some models may have different sensors, please consult the factory service manual for the list of sensors for your model and year)
- Brake pedal position sensor
- Crankshaft position sensor
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