C1002 serious

Brake-Lamp Switch / Brake Switch Stuck High (Dodge/Chrysler)

The C1002 code means the vehicle's onboard diagnostic system has detected: Brake-Lamp Switch / Brake Switch Stuck High (Dodge/Chrysler). This is a serious severity code.

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Keep driving?
Yes, but fix soon
DIY difficulty
hard
Estimated cost
Varies — depends on the specific component this manufacturer-specific code points to on your vehicle. Diagnose before buying parts.

Manufacturer-specific code. C1002 is a manufacturer-specific DTC, so its exact definition can differ by make, model, and year. Use the meaning above as a general guide, and always confirm it against your vehicle manufacturer's official service information (or a make-specific scan tool) before diagnosing or replacing parts.

What Are the Symptoms of C1002?

  • Check Engine or a related warning light on
  • Exact symptoms depend on the specific system this code covers for your make
  • A make-specific scan reveals which subsystem and circuit is involved

What Causes C1002? (Most Likely First)

  • A fault in the specific component or circuit this code monitors (the exact part varies by manufacturer) High
  • Damaged wiring, a corroded connector, or a poor ground in that circuit Moderate
  • A related sensor or control module reporting or causing the fault Moderate

Can I Still Drive with C1002?

Yes, but fix soon. C1002 is rated serious severity. It is not an immediate stop-driving fault, but it will not clear itself — book the repair rather than ignoring the light.

Frequently Asked Questions

Can I keep driving with C1002?

Yes, with the repair booked. A brake switch stuck high usually leaves the brake lights on constantly and disables cruise control and the shift interlock. Following drivers cannot tell when you are actually braking, so fix it promptly - but the brakes themselves still work normally.

Does C1002 mean the same thing on every vehicle?

No. C1002 is a manufacturer-specific diagnostic trouble code, so its exact meaning varies by make, model, and year. Always confirm it against your vehicle manufacturer's service information before diagnosing or replacing parts.

What does C1002 most likely indicate?

Brake-Lamp Switch / Brake Switch Stuck High (Dodge/Chrysler). Treat this as a general guide and verify the specifics for your vehicle.

Mechanics Guide Step-by-step diagnosis

How Do You Diagnose C1002?

  1. Confirm your exact make, model, and year first — C1002 is manufacturer-specific and can mean different things across brands.

  2. Read C1002 with an enhanced/make-specific scan tool and check your manufacturer's official service information for the precise definition and procedure.

  3. Inspect the wiring, connectors, and grounds for the indicated circuit before replacing any part.

C1002 on Diesel, EV & Equipment

The same code ID appears across other engines and platforms. The diagnostic flow varies by manufacturer — these are the platform-specific breakdowns:

Isuzu moderate Right Front Wheel Speed Sensor Signal Erratic

Which Vehicles Commonly Get C1002?

  • 2008-2020 Ford F-150
  • 2010-2022 Toyota Camry
  • 2012-2023 Honda Accord
  • 2009-2021 Chevrolet Silverado

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