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P0620

Alternator Control — Circuit Problem

Medium — fix within daysDrive with caution

Severity: Fix within days. Drive with caution and watch for new symptoms.

What P0620 means

The computer found a fault in the circuit that controls the alternator, so the battery may not be charging correctly.

Common causes

How to fix it

Test the alternator output and check the control wiring and fuse.

Can I drive with P0620?

The battery may run down and the car may stall. Turn off extra electrical loads and get the charging system tested soon.

Related codes

Questions, answered

Is it safe to drive with code P0620?

You can drive short distances carefully; watch for worsening symptoms. The battery may run down and the car may stall. Turn off extra electrical loads and get the charging system tested soon.

What causes code P0620?

The most common causes are: Failed alternator; Damaged wiring; Failed voltage regulator; Blown fuse. A scan tool and a visual check of the parts above is where a technician starts.

How do I fix code P0620?

Test the alternator output and check the control wiring and fuse.

Not repair advice. This page gives general information about code P0620 only. Cars differ by make, model and year — confirm the fault with a scan tool and have the repair done by a qualified technician.

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