Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DTC P1550-P1552; Battery Current Sensor Circuit [12/2012 - ]: Description
The battery current sensor built into the generator control ECU assembly detects the amount of charge/discharge current. The generator control ECU assembly sends voltage generation instructions to the generator assembly based on this signal.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory |
|---|---|---|---|---|---|
| P1550 | Battery Current Sensor Circuit | Difference between the maximum and minimum current values of the battery current sensor is less than 1 A for 10 seconds or more with the ignition switch ON (1 trip detection logic) |
|
Does not come on | DTC stored |
| P1551 | Battery Current Sensor Circuit Low | Battery current sensor output value is abnormally low for 30 seconds or more with the ignition switch ON (1 trip detection logic) |
|
Does not come on | DTC stored |
| P1552 | Battery Current Sensor Circuit High | Battery current sensor output value is abnormally high for 30 seconds or more with the ignition switch ON (1 trip detection logic) |
|
Does not come on | DTC stored |
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.