Chassis, generic

C0044 Brake Pressure Sensor A

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

Covers brake pressure sensor A (sensor 1) in the ABS/ESC hydraulic unit, which measures master-cylinder or circuit brake pressure. The stability and brake modules use this reading to know how hard the driver is braking and to control traction, stability, brake assist and hill-hold. The module sets the code for a signal outside the valid range, an open or short, or a value that disagrees with pedal demand or a second pressure sensor. RAM assigns code C0044-01 to a general electrical failure of brake pressure sensor 1 on the 2024 2500; because the transducer sits inside the hydraulic control unit, the published repair replaces the whole integrated brake unit. A fault disables stability and assist functions and sets the ABS or brake warning lamp.

Likely causes

Pressure sensor failed or out of range
Fault internal to the integrated brake unit
Harness or connector fault

Symptoms

  • ABS or brake warning lamp on
  • Stability and assist functions disabled
  • Changed brake assist behaviour

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€400–2,200
Time1.5–4 h

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

Parts involved

brake pressure sensor a

Related codes

C0045C0046C0024

References: static.nhtsa.gov, en.wikipedia.org.