P1A4B
Hybrid Battery Current Sensor Performance
P1A4B is an OBD-II diagnostic trouble code meaning: Hybrid Battery Current Sensor Performance. Common causes: hybrid battery current sensor malfunction, open or short circuit in the sensor circuit. Estimated repair cost: $89–278.
Symptoms
- Check engine light comes on
- Reduced hybrid system efficiency
- Incorrect battery level display
- The car goes into emergency mode
- Increased fuel consumption
Causes
- Hybrid battery current sensor malfunction
- Open or short circuit in the sensor circuit
- Poor contact in sensor connectors
- Problems with the hybrid system control unit
- Contact corrosion in a high voltage system
How to Fix
- Checking the status of the hybrid battery current sensor
- Diagnostics of the sensor circuit for open circuit and corrosion
- Checking the High Voltage System Connections
- Replacing the current sensor if necessary
- Reflashing the hybrid system control unit (if required)
- Repair only from an authorized dealer
Related codes
FAQ
What does the P1A4B code mean?
P1A4B is an OBD-II diagnostic trouble code that indicates: Hybrid Battery Current Sensor Performance
What causes a P1A4B error code?
The most common causes of P1A4B include: Hybrid battery current sensor malfunction; Open or short circuit in the sensor circuit; Poor contact in sensor connectors; Problems with the hybrid system control unit.
How do I fix a P1A4B diagnostic trouble code?
To fix P1A4B: Checking the status of the hybrid battery current sensor. Diagnostics of the sensor circuit for open circuit and corrosion. Checking the High Voltage System Connections. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1A4B?
Do not drive — repair immediately
How much does it cost to fix P1A4B?
The estimated repair cost for P1A4B is $89–278. Actual cost depends on your vehicle, location, and labor rates.
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