Sensor output is electrically valid but mechanically out of expected range. Mechanical wear or damage in the monitored component. Contamination (fluid, dirt, or debris) affecting sensor accuracy.

Avoid aggressive driving and schedule a diagnostic appointment within the next 1–3 days. Scan for all DTCs with an OBD-II scanner — note any related codes stored alongside P1557. Check coolant level, coolant flow, and cooling fan operation.

Is it safe to drive with P1557?

🟡 Check the vehicle display for drive or charge restrictions and schedule service promptly.

Nissan LEAF

P1557

Warning

Battery Temperature Sensor Circuit Range/Performance

Severity

Warning

What does P1557 mean?

P-code P1557 means "Battery Temperature Sensor Circuit Range/Performance". It is a manufacturer-specific diagnostic trouble code (DTC) in the battery system. The battery temperature sensor circuit range/performance is operating outside its expected performance range, suggesting a mechanical or electrical issue. This warning should be addressed within the next few days to avoid further damage. This code applies to OBD-II compliant electric and hybrid vehicles.

Possible Causes

Sensor output is electrically valid but mechanically out of expected range
Mechanical wear or damage in the monitored component
Contamination (fluid, dirt, or debris) affecting sensor accuracy
Intermittent electrical connection causing fluctuating readings

Recommended Actions

1 Avoid aggressive driving and schedule a diagnostic appointment within the next 1–3 days
2 Scan for all DTCs with an OBD-II scanner — note any related codes stored alongside P1557
3 Check coolant level, coolant flow, and cooling fan operation
4 Inspect the temperature sensor and its wiring for damage or corrosion
5 Clear the DTC, road-test the vehicle, and re-scan to confirm whether the fault returns
6 If the fault persists after inspection and clearing, consult an EV-certified technician for component replacement

This code applies to all vehicles. View generic P1557 information →