What it means
Clutch pedal switch B input reads stuck high. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
At a glance
- Usually lights the check-engine light
How it works
Clutch pedal switch B reports pedal position to the vehicle’s control module, which uses that input for functions such as shift control or starting logic. This code sets when the B circuit signal is higher than expected, often because the signal wire is shorted to battery voltage or a connector has a poor contact.
Common causes
Most likely first.
- Switch wire shorted to battery voltage
- Connector pins corroded - high contact resistance
- Supply wire pinched against B+ source
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
How to diagnose it
- Save the code and freeze-frame data, then watch clutch switch B status while pressing and releasing the pedal to see whether the input stays high.
- Inspect switch B and its connector for moisture, corrosion, backed-out pins, or a loose fit.
- Follow the B signal wire and harness, looking for chafing, pinching, or contact with a power feed; gently move the harness while monitoring the signal.
- Use the wiring diagram to check the B circuit for an unintended connection to battery voltage and test continuity with the circuit isolated as specified by the manufacturer.
- If wiring and connections are sound, test switch B operation against the manufacturer's procedure and check for related control-module codes before considering a module fault.
Common fixes
- Repair a chafed or pinched B signal wire that is contacting a power feed.
- Clean and secure the switch B connector, repairing corroded or pushed-back terminals.
- Replace a faulty clutch pedal switch B after confirming the circuit wiring is sound.
- Repair a confirmed control-module circuit fault using the manufacturer's procedure.
Can I keep driving?
If shifts are harsh, delayed, or slipping, avoid heavy traffic and long trips; stop driving if the vehicle loses reliable gear engagement. Continued operation can worsen transmission damage, so arrange diagnosis promptly.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.