P1551
Battery Current Sensor Circuit Low Input
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$17–56 (est.)
Symptoms
- Check Engine Light Is On
- Incorrect voltage readings on the dashboard
- Battery charging problems
- Reduced electrical system performance
- Random electronic malfunctions
Causes
- Battery current sensor malfunction
- Open or short circuit in the sensor circuit
- Poor connection or corrosion of sensor contacts
- Wiring Harness Problems
- Engine ECU malfunction
How to Fix
- Check the integrity of the wiring to the sensor
- Clean the sensor contacts from corrosion
- Check sensor resistance
- Scan sensor operating parameters
- Replace battery current sensor if necessary