AutoCodes – Hyundai – P0698 Hyundai

P0698 Hyundai Code - Sensor Reference Voltage 'C' Circuit Low

Quick Answer

The control module has internal 5-volt reference buses called "5-volt reference". 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: P0698 Hyundai indicates Sensor Reference Voltage 'C' Circuit Low.
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.

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Code Popularity 19,988

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on May 06, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0698 Hyundai Description

The control module has internal 5-volt reference buses called "5-volt reference". Each reference bus provided 5-volt reference circuit for more than one sensor. Therefore, a fault condition on one 5-volt reference circuit will affect the other 5-volt reference circuits connected to the reference bus. The control module monitors the voltage on the 5-volt reference buses.

OBDII Code P0698 Hyundai - Sensor Reference Voltage 'C' Circuit Low - AutoCodes.com — P0698 Hyundai Code - Sensor Reference Voltage 'C' Circuit Low

What does this mean?

What are the Possible Causes of the DTC P0698 Hyundai?

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 P0698 Hyundai?

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 P0698 Hyundai 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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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 Hyundai Code

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

P0698 indicates a low voltage issue in the Sensor Reference Voltage 'C' Circuit, which affects the sensors relying on this circuit for proper operation.

2. What are common symptoms of code P0698 on a Hyundai?

Symptoms may include the Check Engine Light turning on, poor engine performance, difficulty starting, and possible communication issues with certain sensors.

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

Potential causes include a damaged or corroded wiring harness, a faulty sensor, a defective Engine Control Module (ECM), or a short circuit in the reference voltage line.

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

While the vehicle may still be drivable, ignoring the issue could lead to worsening performance or damage to related sensors and components. Immediate diagnosis is recommended.

5. How do I diagnose a P0698 code on a Hyundai?

Start by inspecting the wiring and connectors in the 'C' circuit for damage or corrosion, test the reference voltage with a multimeter, and check for sensor malfunctions.

6. Which sensors are affected by the P0698 code on a Hyundai?

The specific sensors affected depend on the 'C' circuit in your vehicle, which can include throttle position sensors, MAP sensors, or other components.

7. Can a faulty ECM cause a P0698 code?

Yes, a malfunctioning Engine Control Module can disrupt the reference voltage and trigger this code, though it's a less common cause.

8. What tools are needed to fix a P0698 code on a Hyundai?

Basic tools include a multimeter for voltage testing, a scan tool for clearing the code, and wiring repair tools if damage is found.

9. How much does it cost to fix a P0698 code on a Hyundai?

Repair costs vary but can range from $50 to $150 for wiring repairs, while replacing a sensor or ECM may cost $200 to $1000 depending on the part and labor.

10. Can clearing the code fix the P0698 issue on a Hyundai?

Simply clearing the code will not fix the underlying issue. Proper diagnosis and repair of the circuit or related components are necessary to resolve the problem.