Engine-Codes.com
Engine-Codes – Ford – P123A Ford

P123A Ford Code - BARO Sensor / TC/SC Boost Pressure Sensor 'A' Correlation

Quick Answer

The P123A Ford diagnostic trouble code (DTC) indicates a correlation issue between the BARO (Barometric Pressure) sensor and the TC/SC (Turbocharger/Supercharger) Boost Pressure sensor 'A'. Common causes include Faulty BARO sensor, Faulty TC/SC Boost Pressure sensor 'A', Wiring or connector issues in the sensor circuit. 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
P123A Ford indicates BARO Sensor / TC/SC Boost Pressure Sensor 'A' Correlation.
Common causes
Common causes include Faulty BARO sensor, Faulty TC/SC Boost Pressure sensor 'A', Wiring or connector issues in the sensor circuit.
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 Aug 30, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P123A Ford Description

The P123A Ford diagnostic trouble code (DTC) indicates a correlation issue between the BARO (Barometric Pressure) sensor and the TC/SC (Turbocharger/Supercharger) Boost Pressure sensor 'A'. This code typically means that there is a discrepancy between the expected pressure readings from these sensors, which can impact the engine's performance and efficiency. The BARO sensor measures the atmospheric pressure, while the TC/SC Boost Pressure sensor measures the pressure within the forced induction system. A correlation problem can lead to incorrect air-fuel mixture ratios, reduced engine power, and potential drivability issues.

OBDII Code P123A Ford - BARO Sensor / TC/SC Boost Pressure Sensor 'A' Correlation
P123A Ford Code - BARO Sensor / TC/SC Boost Pressure Sensor 'A' Correlation

Common Causes of P123A Ford

  1. Faulty BARO sensor
  2. Faulty TC/SC Boost Pressure sensor 'A'
  3. Wiring or connector issues in the sensor circuit
  4. Vacuum leaks affecting sensor readings
  5. Software or calibration issues in the engine control module (ECM)

Symptoms of P123A Ford

  1. Check Engine Light illuminated
  2. Reduced engine power or performance
  3. Rough idling or hesitation during acceleration
  4. Decreased fuel efficiency
  5. Turbocharger or supercharger issues (if applicable)

How to Fix P123A Ford

  1. Diagnose the issue using a scan tool to confirm the P123A code and pinpoint the faulty sensor.
  2. Inspect the sensor wiring and connectors for any damage or corrosion, repairing or replacing as needed.
  3. Test the BARO sensor and TC/SC Boost Pressure sensor 'A' for proper functionality, replacing any faulty sensors.
  4. Clear the DTC and perform a test drive to ensure the issue has been resolved.
  5. If necessary, reprogram or recalibrate the ECM to ensure proper sensor readings.

Cost to Fix P123A Ford

The cost of repairing a BARO Sensor / TC/SC Boost Pressure Sensor 'A' Correlation issue can vary depending on the specific cause of the problem and the cost of parts and labor. Generally, replacing a sensor can range from $100 to $300, including parts and labor. However, if wiring repairs or ECM reprogramming are required, the total cost could be higher. It's recommended to consult with a trusted mechanic or repair shop for an accurate estimate based on your vehicle's make and model. Labor rates can vary between $80 and $150 per hour, so it's advisable to inquire about local rates.

Need more information about the P123A Ford code?

Need more information on how to fix the P123A Ford code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P123A Ford 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 P123A Ford Code

1. What are the common symptoms of OBDII code P123A in a Ford?

Symptoms may include reduced engine power, poor acceleration, rough idling, and possible stalling.

2. What does the OBDII code P123A Ford indicate?

This code indicates a correlation error between the Barometric (BARO) sensor and the Turbocharger/Supercharger Boost Pressure Sensor 'A'.

3. What are the possible causes of OBDII code P123A in a Ford?

Possible causes include a faulty BARO sensor, malfunctioning boost pressure sensor, wiring issues, or a problem with the engine control module (ECM).

4. How can I diagnose OBDII code P123A in my Ford?

Diagnosis involves using a scan tool to read the code, checking the sensor readings, inspecting the wiring for damage, and testing the sensor components for proper functionality.

5. Can I continue driving with OBDII code P123A present in my Ford?

It is not recommended to continue driving with this code as it can lead to further engine damage and performance issues. Address the problem promptly.

6. How can I repair OBDII code P123A in my Ford?

Repair may involve replacing the BARO sensor, Turbocharger/Supercharger Boost Pressure Sensor 'A', repairing damaged wiring, or reprogramming the ECM.

7. Are there any DIY tips for fixing OBDII code P123A in a Ford?

While some basic troubleshooting can be done, it is advisable to seek professional help for diagnosing and repairing this code due to the complexity of the sensors involved.

8. Will resetting the fault codes clear OBDII code P123A in my Ford?

Resetting the fault codes may temporarily clear the code, but it will likely return if the underlying issue is not addressed and repaired.

9. How much does it cost to fix OBDII code P123A in a Ford?

The cost of fixing this code can vary depending on the exact cause of the issue, the parts needed for repair, and labor costs. It is recommended to get a diagnosis from a trusted mechanic for an accurate estimate.

10. Can a faulty BARO sensor cause OBDII code P123A in a Ford?

Yes, a faulty BARO sensor can contribute to the triggering of OBDII code P123A in a Ford due to the correlation error with the Turbocharger/Supercharger Boost Pressure Sensor 'A'.

Discuss the causes and fixes for P123A Ford OBDII Code

Submit a New Comment

Code P123A Ford comments

No comments found for this page.