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P0698 Chevrolet Code - 5V Reference 3 Circuit Low Voltage

Quick Answer

The P0698 code for Chevrolet vehicles indicates a 5V Reference 3 Circuit Low Voltage issue. Common causes include Faulty 5V Reference Circuit 3 Sensor: The sensor responsible for monitoring the voltage on the 5V reference circuit 3 may be malfunctioning, Damaged Wiring or Connectors: Any damage to the wiring or connectors in the circuit can cause a drop in voltage, Malfunctioning ECM: The Engine Control Module itself may be faulty and not able to regulate the voltage properly. 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 Chevrolet indicates 5V Reference 3 Circuit Low Voltage.
Common causes
Common causes include Faulty 5V Reference Circuit 3 Sensor: The sensor responsible for monitoring the voltage on the 5V reference circuit 3 may be malfunctioning, Damaged Wiring or Connectors: Any damage to the wiring or connectors in the circuit can cause a drop in voltage, Malfunctioning ECM: The Engine Control Module itself may be faulty and not able to regulate the voltage properly.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code P0698 Chevrolet Description

The P0698 code for Chevrolet vehicles indicates a 5V Reference 3 Circuit Low Voltage issue. This means that the Engine Control Module (ECM) is detecting that the voltage on the 5V reference circuit 3 is lower than the specified range. The 5V reference circuit provides a stable 5-volt power supply to various sensors and components in the vehicle's engine management system. When the voltage on this circuit falls below the expected range, it can lead to erratic sensor readings and potentially affect the performance of the vehicle.

OBDII Code P0698 Chevrolet - 5V Reference 3 Circuit Low Voltage
P0698 Chevrolet Code - 5V Reference 3 Circuit Low Voltage

Common Causes of P0698 Chevrolet

  1. Faulty 5V Reference Circuit 3 Sensor: The sensor responsible for monitoring the voltage on the 5V reference circuit 3 may be malfunctioning.
  2. Damaged Wiring or Connectors: Any damage to the wiring or connectors in the circuit can cause a drop in voltage.
  3. Malfunctioning ECM: The Engine Control Module itself may be faulty and not able to regulate the voltage properly.
  4. Power Supply Issues: Problems with the power supply to the circuit, such as a weak battery or alternator, can lead to low voltage readings.

Symptoms of P0698 Chevrolet

  1. Check Engine Light: The most common symptom associated with the P0698 code is the illumination of the Check Engine Light on the vehicle's dashboard.
  2. Poor Fuel Economy: A malfunctioning 5V reference circuit 3 can lead to incorrect fuel delivery, resulting in decreased fuel efficiency.
  3. Rough Idling: Erratic sensor readings caused by this issue can lead to rough idling or engine hesitation.
  4. Stalling: The engine may stall unexpectedly due to the inaccurate data being received by the ECM.
  5. Reduced Engine Performance: Overall, the vehicle may exhibit reduced engine performance, including a lack of power or responsiveness.

How to Fix P0698 Chevrolet

  1. Diagnose the Issue: Use a diagnostic scanner to retrieve and interpret the trouble codes and perform further testing to pinpoint the exact cause of the low voltage on the 5V reference circuit 3.
  2. Inspect Wiring and Connectors: Check the wiring and connectors in the circuit for any damage, corrosion, or loose connections. Repair or replace as needed.
  3. Test 5V Reference Circuit 3 Sensor: Test the sensor responsible for monitoring the voltage on the circuit to determine if it is functioning correctly. Replace if necessary.
  4. Check ECM Functionality: Test the ECM to ensure it is working properly and regulating the voltage within the specified range. Replace the ECM if it is found to be faulty.
  5. Clear Codes and Test Drive: Once the repairs have been completed, clear the trouble codes from the ECM and test drive the vehicle to verify that the issue has been resolved.

Cost to Fix P0698 Chevrolet

The cost of repairing a P0698 code on a Chevrolet vehicle can vary depending on the specific cause of the issue and the labor rates in your area. Typically, the parts needed for this repair, such as a new sensor or ECM, can range from $100 to $500. Additionally, the labor costs for diagnosing and repairing this issue can be anywhere from $150 to $500, depending on the complexity of the repair and the labor rates at the auto repair shop.

What does this mean?

Tech Notes for P0698 Chevrolet

Disconnecting one component at a time from the affected 5 Volt reference circuit while observing the scan tool 5 Volt Reference Circuit Status parameter may help locate the fault. The scan tool parameter will change from Malfunction to OK when the source of the fault is disconnected. If all 5 Volt reference components have been disconnected and a fault is still indicated, the fault may exist in the wiring harness.



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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Information for Specific Chevrolet Models

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0698 Chevrolet Code

1. What does the OBDII code P0698 mean on a Chevrolet?

P0698 indicates a low voltage issue in the 5V Reference 3 Circuit, which is responsible for providing a steady 5-volt signal to certain sensors in the vehicle.

2. What are the common symptoms of P0698 on a Chevrolet?

Symptoms may include a check engine light, poor engine performance, erratic sensor readings, or difficulty starting the vehicle.

3. What causes the P0698 code to appear on a Chevrolet?

Common causes include a faulty sensor, damaged wiring or connectors in the 5V reference circuit, a short to ground, or a malfunctioning powertrain control module (PCM).

4. Can I drive my Chevrolet with a P0698 code?

Driving with this code is not recommended, as it can lead to erratic engine behavior or further damage to electrical components.

5. How do I diagnose the P0698 code on a Chevrolet?

Start by inspecting the wiring and connectors for damage or corrosion, then use a multimeter to check for proper voltage in the 5V reference circuit. If necessary, test individual sensors or the PCM.

6. Which sensors use the 5V reference circuit in a Chevrolet?

The 5V reference circuit typically powers sensors like the throttle position sensor (TPS), manifold absolute pressure (MAP) sensor, and camshaft position sensor, among others.

7. What tools are needed to troubleshoot the P0698 code?

You’ll need an OBDII scan tool, a multimeter, and possibly a wiring diagram for your specific Chevrolet model.

8. How much does it cost to repair a P0698 code on a Chevrolet?

Costs vary depending on the issue. Replacing a damaged sensor might cost $100-$300, while repairing wiring or connectors could be less. A PCM replacement may cost over $500.

9. Can a failing PCM cause the P0698 code on a Chevrolet?

Yes, a malfunctioning PCM can cause this code, but it’s less common. The PCM should be tested only after ruling out sensors, wiring, and connectors.

10. How can I prevent the P0698 code from reoccurring on my Chevrolet?

Regularly inspect and maintain the vehicle’s wiring and connectors, avoid aftermarket modifications that might interfere with the 5V reference circuit, and promptly address any sensor issues.

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