Subaru P1840: Transmission Fluid Pressure Sensor Switch A Circuit

Is your scanner showing Subaru P1840?
No worries. We'll show you what it means and how to deal with it.

Presented by

Randy Worner

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OVERVIEW

Severity

High

DIY Difficulty Level

Intermediate

Repair Cost

$170-$300

Can I Still Drive?

What Does The Subaru P1840 Code Mean?

Front brake oil pressure switch malfunction. Excessive shift shock felt.

Open or shorted Fr/B fluid pressure switch or switch malfunction

Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:

Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!

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