P08B8 code meaning
Clutch Pedal Position Sensor B Circuit Intermittent/Erratic
Powertrain system Generic code P08xx codes Check engine light
What P08B8 means
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.
P08B8 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 2 hours
- Clears after repairAfter a drive cycle
Symptoms of P08B8
- Start-stop dropping out intermittently
- Warning lamp that comes and goes
Common causes of P08B8
- Most likelyLoose or worn terminals in the sensor B connector
- PossibleWire fatiguing where the harness flexes with pedal movement
- PossibleSensor B producing glitches internally
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Clutch pedal position sensor bWiring harnessECM
What each part of P08B8 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 8 | Area: transmission. |
| B8 | The exact fault in that area. |
What to do next
- Note P08B8 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P08B8
What does P08B8 mean?
P08B8 means "Clutch Pedal Position Sensor B Circuit Intermittent/Erratic". P08B8 is intended for a second clutch pedal sensor whose signal drops out briefly or jumps without staying out of range. It is a generic code, so it means the same on every make.
Is it safe to drive with P08B8?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P08B8 fail an emissions test?
Yes, it can. P08B8 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P08B8 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P08B8 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.