Chassis, generic

C061A Brake Pedal Position Sensor B Offset Exceeded Learning Limit

Check engine lightUsually off
EmissionsNot relevant
Drive cycleRequired
Limp modeNo

C061A is the same learn-limit check for the second channel, B. Many pedal sensors hold two independent elements; on GM trucks since 2012 one potentiometer feeds the ECM and the other the BCM, each with its own 5 V reference, ground and signal. Each controller keeps its own released-position value and updates it whenever it sees a lower voltage, so a short dropout on one channel can leave B with a skewed zero while A stays correct. The Hitachi patent rejects a learned zero outside its prescribed range as a sensor fault. Snap-on and GM's 16-NA-155 stress relearning in both modules without touching the pedal. Which physical channel a maker calls B is not public, and no maker documents C061A; channel A is C0619.

Likely causes

Dropout or fretting corrosion on the channel B reference, ground or signal pin
Learn done in only one module, or the pedal moved during the learn
Pedal rest position changed by a mat, bracket damage or adjustment
Drifting second element inside the pedal sensor

Symptoms

  • Brake system warning or message
  • Mismatch between modules about pedal state, e.g. brake lights versus cruise control
  • Shift interlock or start function may act up

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€0–400
Time0.3–1.5 h

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

Parts involved

brake pedal sensor bbrake control module

Related codes

C0619C05C1C0277

References: static.nhtsa.gov, gearsmagazine.com, patents.google.com, snapon.com.