Powertrain, generic · Fuel and air metering

P01C6 Fuel Pressure Sensor A Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

Fuel pressure sensor A is a fuel pressure sensor without 'rail' in its name and without a bank – unlike the rail pressure sensors P0190–P0194 and P01BE–P01C2; which sensor it is depends on the manufacturer. The only documented case is FCA, where sensor A is the low-pressure sensor in the supply line, read together with the fuel pump control module. GM calls its low-pressure sensor 'sensor B' (P018A–P018E). P01C6 means the signal voltage is above its upper limit – typically an open sensor ground or a short to voltage. FCA documents it together with P025C (fuel pump module control low) and P016F (pressure control at its limit, pressure too low), sometimes with no start or stalling; the checks cover the low-pressure sensor connector, a ground point, the pump control module and the tank pump module for corrosion, water and pin damage.

Likely causes

Corrosion, water or pin damage at sensor, pump module or ground point
Sensor ground open
Signal wire shorted to voltage
Sensor faulty

Symptoms

  • Check engine light on
  • Hard starting or stalling possible
  • Hesitation or lack of power under load

Repair estimate

DifficultyMediumDIY possible
Parts and labour€50–350
Time0.5–2.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

fuel pressure sensor afuel pump control modulesensor wiring

Related codes

P01C3P01C4P01C5P01C7P016FP025C

References: law.cornell.edu, static.nhtsa.gov, gsi.ext.gm.com.