Powertrain, generic · Transmission

P08B8 Clutch Pedal Position Sensor B Circuit Intermittent/Erratic

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

P08B8 is intended for a second clutch pedal sensor whose signal drops out briefly or jumps without staying out of range. No manufacturer documents this code publicly. Ford, the only maker found to publish sensor B codes, lists just low (P08B6), high (P08B7) and the A/B comparison (P08B9) for its dual PWM pedal sensors, so short glitches there would most likely surface as a correlation fault; GM covers sensor A only. CARB requires circuit and plausibility monitoring of such inputs. Likely culprits are worn connector terminals or a wire fatiguing where the harness moves with the pedal. Sensor A's counterpart is P08AB. Drivers may see start-stop drop out now and then.

Likely causes

Loose or worn terminals in the sensor B connector
Wire fatiguing where the harness flexes with pedal movement
Sensor B producing glitches internally

Symptoms

  • Start-stop dropping out intermittently
  • Warning lamp that comes and goes

Repair estimate

DifficultyMediumDIY possible
Parts and labour€50–300
Time0.5–2 h

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

Parts involved

clutch pedal position sensor bwiring harnessecm

Related codes

P08B4P08B6P08B7P08B9P08AB

References: law.cornell.edu, fordservicecontent.com.