Chrysler Error Code P1594: How to Fix It

Q: What causes Chrysler P1594 error code?

P1594 is typically caused by a faulty voltage regulator, defective alternator, damaged wiring in the charging system, or rarely, a PCM software issue. The most common cause is a failing voltage regulator that allows the alternator to overcharge the electrical system.

Q: Can I drive with P1594 code?

You should not drive with P1594 code as the high voltage can damage the battery, electronic modules, and other electrical components. The overcharging condition can also cause the battery to overheat or even explode in extreme cases.

Q: How much does it cost to fix P1594?

Repair costs typically range from $300-$600 for alternator replacement, or $100-$200 for wiring repairs if that's the only issue. Diagnostic time at a shop usually costs $100-$150. DIY repairs can save on labor costs.

Q: Will P1594 cause my battery to die?

P1594 actually indicates overcharging, which can damage the battery by causing it to overheat and boil the electrolyte. While it won't immediately cause the battery to die, it will significantly shorten battery life and can cause permanent damage.

Abstract

Chrysler error code P1594 indicates your vehicle's charging system is producing voltage that's too high, typically above 15.5 volts. This can damage electrical components and the battery if not addressed quickly.