P0D51

What it means

The ECM detects a circuit fault on the battery charger hybrid/ev battery output current sensor circuit. Reading cannot be used reliably for control.

Is it safe to drive?

This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly.

Most likely causes

• Sensor failed

  high

  One of the most commonly reported causes for this code — check this first.

• Wiring or connector fault

  medium

  A plausible cause — test and verify before replacing parts.

• Pack cell imbalance approaching service threshold

  low

  Less common, but worth ruling out after the more likely causes.

Related help

• Full P0D51 diagnosis, causes & costs
• How to read check engine light codes
• Is it safe to drive with the light on?