P0698 Buick Code - 5V Reference 3 Circuit Low Voltage
Quick Answer
The P0698 Buick diagnostic trouble code (DTC) refers to a 5V Reference 3 Circuit Low Voltage. Common causes include Faulty wiring or connectors in the 5V Reference 3 Circuit, Defective sensors relying on the 5V reference signal, Malfunctioning ECM/PCM. 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
- P0698 Buick indicates 5V Reference 3 Circuit Low Voltage.
- Common causes
- Common causes include Faulty wiring or connectors in the 5V Reference 3 Circuit, Defective sensors relying on the 5V reference signal, Malfunctioning ECM/PCM.
- 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 P0698 Buick Description
The P0698 Buick diagnostic trouble code (DTC) refers to a 5V Reference 3 Circuit Low Voltage. In modern vehicles, the Engine Control Module (ECM) or Powertrain Control Module (PCM) sends out 5-volt reference signals to various sensors and components in the vehicle. These reference signals are used by the sensors to provide feedback to the ECM/PCM, aiding in the management of engine performance, emissions, and other critical functions. When the ECM/PCM detects that the 5V Reference 3 Circuit is operating at a lower voltage than specified, it triggers the P0698 code.
Common Causes of P0698 Buick
- Faulty wiring or connectors in the 5V Reference 3 Circuit
- Defective sensors relying on the 5V reference signal
- Malfunctioning ECM/PCM
- Voltage regulator issues
- Corrosion or damage to electrical components
Symptoms of P0698 Buick
- Rough idling or engine misfires
- Stalling or difficulty starting the engine
- Reduced fuel efficiency
- Illumination of the check engine light
- Loss of power or acceleration
How to Fix P0698 Buick
- Begin by conducting a thorough inspection of the wiring, connectors, and sensors related to the 5V Reference 3 Circuit.
- Test the voltage output of the ECM/PCM and voltage regulator to ensure they are functioning within specifications.
- Replace any faulty wiring, connectors, sensors, or components identified during the inspection.
- Clear the DTC from the ECM/PCM memory using a diagnostic scanner and test drive the vehicle to verify that the issue has been resolved.
- If the problem persists, consult a professional mechanic for further diagnosis and potential ECM/PCM replacement.
Cost to Fix P0698 Buick
The typical repair costs for addressing a P0698 Buick code can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, you can expect to pay anywhere from $100 to $500 for parts and labor. Keep in mind that labor rates at auto repair shops can vary, typically ranging between $80 and $150 per hour. It's advisable to consult with local repair shops to get a more accurate estimate based on your vehicle make and model.
Tech Notes for P0698 Buick
The 5 Volt reference 3 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)
- Accelerator pedal position sensor 2
- Manifold absolute pressure sensor
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