AutoCodes – Volkswagen – P0652 Volkswagen

P0652 Volkswagen Code - Sensor Reference Voltage 'B' Circuit Low

Quick Answer

This fault code is stored in the Engine Control Module (ECM) when a malfunction occurs with the sensor supply voltage circuit. Common causes include Faulty Engine Control Module (ECM), Engine Control Module harness is open or shorted, Engine Control Module 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: P0652 Volkswagen indicates Sensor Reference Voltage 'B' Circuit Low.
Common causes: Common causes include Faulty Engine Control Module (ECM), Engine Control Module harness is open or shorted, Engine Control Module 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 44,176

How popular is this code, among other codes? Medium

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 03, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0652 Volkswagen Description

This fault code is stored in the Engine Control Module (ECM) when a malfunction occurs with the sensor supply voltage circuit. The Engine Control Module outputs a 5-volt supply voltage to certain sensors. Many components share the same 5-volt supply. If fault codes exist for multiple components that operate with a 5-volt supply the wiring from the Engine Control Module and the Engine Control Module itself should be tested. Also, each component should be disconnected in turn to identify a faulty component pulling down the supply circuit. The Diagnostic Trouble Code (DTC) will set when the Engine Control Module has detected the sensor 5-volt reference circuit voltage is lower than expected.

OBDII Code P0652 Volkswagen - Sensor Reference Voltage 'B' Circuit Low - AutoCodes.com — P0652 Volkswagen Code - Sensor Reference Voltage 'B' Circuit Low

What does this mean?

What are the Possible Causes of the DTC P0652 Volkswagen?

Faulty Engine Control Module (ECM)
Engine Control Module harness is open or shorted
Engine Control Module circuit poor electrical connection
Shorted sensor on 5 volt circuit

How to Fix the DTC P0652 Volkswagen?

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 P0652 Volkswagen 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.

Need more information about the P0652 Volkswagen code?

Need more information on how to fix the P0652 Volkswagen code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0652 Volkswagen code diagnosed by a professional: Find a repair shop in your area

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 P0652 Volkswagen Code

1. What are the common symptoms of OBDII code P0652 in a Volkswagen?

- Common symptoms include illuminated Check Engine light, poor engine performance, stalling, and rough idling.

2. What causes the Sensor Reference Voltage 'B' Circuit Low code in a Volkswagen?

- The code P0652 is typically triggered by a fault in the sensor reference voltage circuit, often caused by a short circuit, damaged wiring, or a faulty sensor.

3. Can driving with OBDII code P0652 cause further damage to the vehicle?

- Continuing to drive with the P0652 code may lead to potential damage to other engine components and worsen fuel efficiency.

4. How can I diagnose the Sensor Reference Voltage 'B' Circuit Low issue in my Volkswagen?

- Diagnosing the P0652 code involves using an OBDII scanner to retrieve the code, checking the sensor voltage, inspecting wiring for damage, and testing the sensor for proper functionality.

5. What are the recommended repair tips for fixing OBDII code P0652 in a Volkswagen?

- Repair tips may include repairing or replacing damaged wiring, replacing the faulty sensor, and clearing the code with the OBDII scanner.

6. Is it safe to continue driving my Volkswagen with the Check Engine light on due to code P0652?

- It is not recommended to continue driving with the Check Engine light on, as the underlying issue causing the P0652 code may affect the vehicle's performance and lead to further problems.

7. Can a DIY enthusiast fix OBDII code P0652 in a Volkswagen?

- Depending on the DIY enthusiast's skill level and access to tools, it may be possible to address the P0652 code by following repair guides and tutorials.

8. How much does it typically cost to repair OBDII code P0652 in a Volkswagen?

- Repair costs for the P0652 code can vary based on the extent of the issue, parts needed for replacement, and labor charges, ranging from a few hundred to over a thousand dollars.

9. Will resetting the Check Engine light clear the OBDII code P0652 in a Volkswagen?

- Resetting the Check Engine light may temporarily clear the code, but if the underlying issue causing the P0652 code is not fixed, the light is likely to come back on.

10. Can a faulty battery or alternator cause OBDII code P0652 in a Volkswagen?

- While a faulty battery or alternator can cause voltage-related issues, they are not typically direct causes of the Sensor Reference Voltage 'B' Circuit Low code P0652.