P123A
BARO Sensor / TC/SC Boost Pressure Sensor 'A' Correlation
P123A is an OBD-II diagnostic trouble code meaning: BARO Sensor / TC/SC Boost Pressure Sensor 'A' Correlation. Common causes: atmospheric pressure sensor (baro) malfunction, problems with the boost pressure sensor (tc/sc). Estimated repair cost: $22–89.
Symptoms
- Loss of engine power
- Uneven engine operation
- Increased fuel consumption
- Check Engine light comes on
- Jerking during acceleration
Causes
- Atmospheric pressure sensor (BARO) malfunction
- Problems with the boost pressure sensor (TC/SC)
- Open or short circuit in sensor wiring
- Mechanical problems in the boost system (leaks, turbine failure)
- Moisture getting into sensor contacts
How to Fix
- Check the readings of the BARO and TC/SC sensors with a scanner
- Inspect the wiring and sensor connectors for damage
- Check the charging system for air leaks
- If necessary, replace the faulty sensor
- Clear error codes and test drive
Related codes
FAQ
What does the P123A code mean?
P123A is an OBD-II diagnostic trouble code that indicates: BARO Sensor / TC/SC Boost Pressure Sensor 'A' Correlation
What causes a P123A error code?
The most common causes of P123A include: Atmospheric pressure sensor (BARO) malfunction; Problems with the boost pressure sensor (TC/SC); Open or short circuit in sensor wiring; Mechanical problems in the boost system (leaks, turbine failure).
How do I fix a P123A diagnostic trouble code?
To fix P123A: Check the readings of the BARO and TC/SC sensors with a scanner. Inspect the wiring and sensor connectors for damage. Check the charging system for air leaks. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P123A?
Yes, but get it checked soon
How much does it cost to fix P123A?
The estimated repair cost for P123A is $22–89. Actual cost depends on your vehicle, location, and labor rates.
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