P23BA
NOx Sensor Heater Sense Circuit Intermittent Bank 1 Sensor 3
P23BA is an OBD-II diagnostic trouble code meaning: NOx Sensor Heater Sense Circuit Intermittent Bank 1 Sensor 3. Common causes: open or short circuit in the nox sensor heater circuit, poor contact in the sensor connector. Estimated repair cost: $56–167.
Symptoms
- Check Engine Light Is On
- Reduced engine power
- Increased fuel consumption
- Unstable idling
- Dips during acceleration
Causes
- Open or short circuit in the NOx sensor heater circuit
- Poor contact in the sensor connector
- Malfunction of the NOx sensor itself (bank 1, sensor 3)
- Damage to the wiring harness near the exhaust system
- Problems with the engine control unit
How to Fix
- Check the continuity and voltage in the heater circuit
- Inspect the connectors and contacts of the sensor for corrosion
- Measure the resistance of the sensor heating element
- If necessary, replace the NOx sensor
- Check for ECU firmware updates
Related codes
Error P23BA by Vehicle Brand
FAQ
What does the P23BA code mean?
P23BA is an OBD-II diagnostic trouble code that indicates: NOx Sensor Heater Sense Circuit Intermittent Bank 1 Sensor 3
What causes a P23BA error code?
The most common causes of P23BA include: Open or short circuit in the NOx sensor heater circuit; Poor contact in the sensor connector; Malfunction of the NOx sensor itself (bank 1, sensor 3); Damage to the wiring harness near the exhaust system.
How do I fix a P23BA diagnostic trouble code?
To fix P23BA: Check the continuity and voltage in the heater circuit. Inspect the connectors and contacts of the sensor for corrosion. Measure the resistance of the sensor heating element. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P23BA?
Yes, but get it checked soon
How much does it cost to fix P23BA?
The estimated repair cost for P23BA is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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