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P1551 Volkswagen Code - Barometric Pressure Sensor Circuit Short to B+

Quick Answer

The P1551 Volkswagen diagnostic trouble code (DTC) indicates a problem with the barometric pressure sensor circuit short to B+ in the vehicle's engine control module (ECM) system. Common causes include Short circuit in the barometric pressure sensor wiring, Faulty barometric pressure sensor, Issues with the ECM. 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
P1551 Volkswagen indicates Barometric Pressure Sensor Circuit Short to B+.
Common causes
Common causes include Short circuit in the barometric pressure sensor wiring, Faulty barometric pressure sensor, Issues with the ECM.
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 10, 2024
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Code P1551 Volkswagen Description

The P1551 Volkswagen diagnostic trouble code (DTC) indicates a problem with the barometric pressure sensor circuit short to B+ in the vehicle's engine control module (ECM) system. The barometric pressure sensor plays a crucial role in measuring the atmospheric pressure outside of the vehicle, which is essential for determining the correct air-fuel mixture for combustion in the engine. When the sensor circuit is shorted to B+ (positive battery voltage), it can lead to inaccurate readings or a complete failure of the sensor, resulting in various performance issues.

OBDII Code P1551 Volkswagen - Barometric Pressure Sensor Circuit Short to B+
P1551 Volkswagen Code - Barometric Pressure Sensor Circuit Short to B+

Common Causes of P1551 Volkswagen

  1. Short circuit in the barometric pressure sensor wiring
  2. Faulty barometric pressure sensor
  3. Issues with the ECM
  4. Corrosion or damage to sensor connectors
  5. Electrical issues in the vehicle's wiring system

Symptoms of P1551 Volkswagen

  1. Erratic idling or engine stalling
  2. Poor acceleration and overall engine performance
  3. Decreased fuel efficiency
  4. Check engine light illuminated on the dashboard

How to Fix P1551 Volkswagen

  1. Diagnostic: Begin by using a scan tool to retrieve the specific DTC and perform a thorough diagnostic to pinpoint the exact cause of the issue.
  2. Visual inspection: Inspect the wiring harness, connectors, and sensor for any visible damage or corrosion.
  3. Replace sensor: If the barometric pressure sensor is faulty, replace it with a new one following the manufacturer's guidelines.
  4. Repair wiring: If a short circuit is detected in the wiring, repair or replace the damaged section to ensure proper connectivity.
  5. Clear codes and test: Clear the DTC from the ECM memory, and test drive the vehicle to ensure that the issue has been resolved.

Cost to Fix P1551 Volkswagen

The typical repair costs for addressing a P1551 Volkswagen code can range from $150 to $400, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's advisable to check local rates for a more precise estimate. Keep in mind that rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less.

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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 P1551 Volkswagen Code

1. What are the common symptoms of OBDII code P1551 in a Volkswagen related to the Barometric Pressure Sensor Circuit Short to B+?

The common symptoms include engine performance issues, rough idle, stalling, poor fuel efficiency, and the illumination of the Check Engine Light.

2. What can cause the Barometric Pressure Sensor Circuit Short to B+ in a Volkswagen?

Possible causes of this issue include a short circuit in the wiring, a faulty barometric pressure sensor, damaged connectors, or a problem with the Engine Control Module (ECM).

3. How can I diagnose the Barometric Pressure Sensor Circuit Short to B+ in my Volkswagen?

Diagnosing this problem usually involves using a scan tool to read the OBDII codes, checking the wiring and connectors for any visible damage, and testing the barometric pressure sensor for proper function.

4. Can I continue driving my Volkswagen with the P1551 code present?

It is not recommended to continue driving with the P1551 code active, as it can lead to further damage to the engine and decrease in performance. It is best to address the issue promptly.

5. How do I repair the Barometric Pressure Sensor Circuit Short to B+ in my Volkswagen?

Repairing this issue may involve repairing or replacing damaged wiring, replacing the barometric pressure sensor, ensuring proper connections, and clearing the OBDII code with a scan tool.

6. Is it possible to reset the OBDII code P1551 in a Volkswagen without fixing the issue?

While you can clear the code temporarily using a scan tool, the underlying issue causing the code will remain unresolved. It is recommended to address the root cause of the problem to prevent it from recurring.

7. Can a DIY enthusiast fix the P1551 code related to the Barometric Pressure Sensor Circuit Short to B+?

If you have experience with automotive diagnostics and repair, you may be able to address the issue yourself by following a repair manual or guide specific to your Volkswagen model.

8. How much does it typically cost to repair the Barometric Pressure Sensor Circuit Short to B+ in a Volkswagen?

The cost of repairing this issue can vary depending on the extent of the damage, the parts needed, and whether you choose to do the repair yourself or take your vehicle to a professional mechanic. It is advisable to get quotes from different sources.

9. Will the Check Engine Light turn off automatically after fixing the P1551 code in a Volkswagen?

After successfully repairing the issue causing the P1551 code and clearing the code with a scan tool, the Check Engine Light should turn off. If it persists, further diagnostics may be needed.

10. Is the P1551 OBDII code specific to Volkswagen vehicles or can it occur in other makes and models?

While the P1551 code is associated with a Barometric Pressure Sensor Circuit Short to B+ in Volkswagen vehicles, similar codes related to barometric pressure sensors may appear in other car makes and models as well.

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