Powertrain, generic · Computer and auxiliary outputs

P06D7 Sensor Reference Voltage F Circuit Low

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

The engine module feeds sensors from several regulated 5 V reference circuits; a short at one sensor pulls the whole circuit down and all its sensors report at once – unplug them one by one to find the culprit. P06D7 means reference F is too low – typically a short to ground. No manufacturer document available to us names P06D7 itself; Ram's 6.7 L Cummins documents the neighbouring P06D3 for an engine module fault. Sensors on the circuit then read low; starting problems are possible if the rail pressure sensor is affected.

Likely causes

Short in the wire or sensor of a connected sensor
Chafing or water in harness or connector
A connected sensor faulty internally
Module internal voltage regulator or components

Symptoms

  • Check engine light
  • Several sensor codes at once
  • Reduced power or limp mode
  • Possibly starting problems

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€80–600
Time1–3 h

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

Parts involved

sensor reference voltage circuitsensor wiringengine control module

Related codes

P06D6P06D8P06D9P06D3P0192

References: law.cornell.edu, static.nhtsa.gov.