P0651 KIA Code - Sensor Reference Voltage 'B' Circuit Open
Quick Answer
The control module has 2 internal 5-volt reference buses called "5-volt reference 1" and"5-volt reference 2". Common causes include Faulty Engine Control Module (ECM), ECM harness is open or shorted, ECM 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
- P0651 KIA indicates Sensor Reference Voltage 'B' Circuit Open.
- Common causes
- Common causes include Faulty Engine Control Module (ECM), ECM harness is open or shorted, ECM 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 P0651 KIA Description
What are the Possible Causes of the DTC P0651 KIA?
- Faulty Engine Control Module (ECM)
- ECM harness is open or shorted
- ECM circuit poor electrical connection
- Shorted sensor on 5 volt circuit
How to Fix the DTC P0651 KIA?
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 P0651 KIA 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 P0651 KIA Code
1. What does the OBDII code P0651 mean for a Kia vehicle?
P0651 indicates an open circuit in the Sensor Reference Voltage 'B' circuit, meaning the ECU is not detecting the correct voltage from a sensor or group of sensors.
2. What are common symptoms of the P0651 code in a Kia?
Symptoms may include a check engine light, poor engine performance, reduced fuel efficiency, or issues with specific sensors like the throttle position sensor or MAP sensor.
3. What causes the P0651 code to appear on a Kia?
Common causes include damaged wiring, a faulty sensor, a defective powertrain control module (PCM), or poor electrical connections in the Sensor Reference Voltage 'B' circuit.
4. How do I diagnose the P0651 code on my Kia?
Start by inspecting the wiring and connectors associated with the Sensor Reference Voltage 'B' circuit. Use a multimeter to check for continuity and proper voltage. If no issues are found, test the sensors and PCM.
5. Can I drive my Kia with the P0651 code?
Driving with the P0651 code is not recommended, as it may cause performance issues or damage to other components if left unresolved.
6. How much does it cost to repair the P0651 code on a Kia?
Repair costs vary depending on the issue. Fixing wiring or connectors may cost $50-$150, while replacing a faulty sensor or PCM could cost $200-$800 or more.
7. Which sensors are commonly affected by the P0651 code?
Affected sensors may include the throttle position sensor (TPS), manifold absolute pressure (MAP) sensor, or other sensors relying on the Sensor Reference Voltage 'B' circuit.
8. What tools are needed to troubleshoot the P0651 code?
You'll need an OBDII scanner, a multimeter, and a wiring diagram for your Kia's Sensor Reference Voltage 'B' circuit.
9. Can a faulty PCM trigger the P0651 code on a Kia?
Yes, a defective PCM can cause the P0651 code if it fails to provide or monitor the reference voltage correctly.
10. What should I check first when troubleshooting the P0651 code?
Begin by inspecting the wiring and connectors in the Sensor Reference Voltage 'B' circuit for damage, corrosion, or loose connections.
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