P123B
BARO Sensor / TC/SC Boost Pressure Sensor 'B' Correlation
P123B is an OBD-II diagnostic trouble code meaning: BARO Sensor / TC/SC Boost Pressure Sensor 'B' Correlation. Common causes: atmospheric pressure sensor (baro) malfunction, boost pressure sensor 'b' faulty. Estimated repair cost: $33–167.
Symptoms
- Check Engine light comes on
- Reduced engine power
- Unstable engine operation
- Increased fuel consumption
- The engine goes into emergency mode
Causes
- Atmospheric pressure sensor (BARO) malfunction
- Boost pressure sensor 'B' faulty
- Problems with sensor wiring or connectors
- Leaks in the boost system
- Problems with the engine ECU
How to Fix
- Check the atmospheric pressure sensor readings
- Check boost pressure sensor 'B'
- Inspect the wiring and sensor connectors
- Check the system for leaks
- If necessary, replace faulty sensors
Related codes
FAQ
What does the P123B code mean?
P123B is an OBD-II diagnostic trouble code that indicates: BARO Sensor / TC/SC Boost Pressure Sensor 'B' Correlation
What causes a P123B error code?
The most common causes of P123B include: Atmospheric pressure sensor (BARO) malfunction; Boost pressure sensor 'B' faulty; Problems with sensor wiring or connectors; Leaks in the boost system.
How do I fix a P123B diagnostic trouble code?
To fix P123B: Check the atmospheric pressure sensor readings. Check boost pressure sensor 'B'. Inspect the wiring and sensor connectors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P123B?
Yes, but get it checked soon
How much does it cost to fix P123B?
The estimated repair cost for P123B is $33–167. Actual cost depends on your vehicle, location, and labor rates.
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