Low or no reference voltage supplied to the sensor. Faulty sensor with a weak or intermittent output signal. High resistance in the signal wire reducing voltage at the module.

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 P155A. Check the sensor reference voltage (should be ~5V) and signal output with a multimeter.

Is it safe to drive with P155A?

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

Nissan LEAF

P155A

Warning

Battery Temperature Sensor Circuit Low Input

Severity

Warning

What does P155A mean?

P-code P155A means "Battery Temperature Sensor Circuit Low Input". It is a manufacturer-specific diagnostic trouble code (DTC) in the battery system. The sensor or circuit is reading a voltage or signal value below its expected minimum range for the battery temperature sensor circuit low input. 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

Low or no reference voltage supplied to the sensor
Faulty sensor with a weak or intermittent output signal
High resistance in the signal wire reducing voltage at the module
Poor ground connection at the sensor or module

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 P155A
3 Check the sensor reference voltage (should be ~5V) and signal output with a multimeter
4 Clean or replace the sensor connector — corrosion is a common cause of out-of-range voltage readings
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 P155A information →