Sensor has completely failed and produces no output signal. Disconnected or severely corroded electrical connector. Broken wire in the signal path between sensor and 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 P0A04. Check coolant level, coolant flow, and cooling fan operation.

Is it safe to drive with P0A04?

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

Ford F-150 Lightning

P0A04

Warning

Motor Electronics Coolant Temperature Sensor Circuit Intermittent

Severity

Warning

What does P0A04 mean?

P-code P0A04 means "Motor Electronics Coolant Temperature Sensor Circuit Intermittent". It is a EV-specific diagnostic trouble code (DTC) in the electric motor / drive system. The motor electronics coolant temperature sensor circuit intermittent signal is absent or intermittent, preventing the control module from monitoring this parameter. 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 has completely failed and produces no output signal
Disconnected or severely corroded electrical connector
Broken wire in the signal path between sensor and module
Control module failure unable to process the incoming signal

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 P0A04
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 P0A04 information →