Chevrolet P125A: Fuel Pressure Regulator 2 High Control Circuit Low Voltage

Is your scanner showing Chevrolet P125A?
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

$200-$300

Can I Still Drive?

Yes (Short-term only)

What Does The Chevrolet P125A Code Mean?

Engine speed is greater than 600 RPM. Battery voltage is greater than 11 V.

The ECM detects low voltage on the supply voltage circuit of fuel pressure regulator 2 for greater than 1 s.

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!

GM, 2014, Service Bullettin – Instrument Panel Cluster (IPC) Warning Lamps And/Or MIL Are Illuminated Diesel Exhaust Fluid (DEF)
Message Displayed Various DTCs Set (Inspect Wiring Harnesses for Chafing).
GM, 2015, Service Bullettin – Gauge Fluctuation, Various DTCs, Wiring Harness Chafing/Rubbing on A/C Line.
GM, 2016, Service Bullettin – Instrument Panel Cluster (IPC) Warning Lamps And/Or MIL Are Illuminated Diesel Exhaust Fluid (DEF)
Message Displayed Various DTCs Set (Inspect Wiring Harnesses for Chafing).

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