P2E51

Battery Charger Coupler Temperature Sensor D Circuit Low

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

Charging system warning on dashboard
Reduced battery charging efficiency
The battery does not charge or charges slowly
Charger overheating in some cases

Causes

Open or short circuit in the temperature sensor circuit
Malfunction of the temperature sensor itself
Poor contact in the sensor connector
Wiring harness damage
Problems with the charging system control unit

How to Fix

Check the continuity of the temperature sensor circuit
Inspect connectors and contacts for corrosion or damage
Check the resistance of the temperature sensor
Replace temperature sensor if necessary
Scan the system for other errors

Related codes