Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Code P0703, TCC Brake Switch Input: Notes
PCM monitors status of TCC brake switch input. Code P0703 will set when the following conditions are present.
- Code P0501 is not present.
- Vehicle speed has been greater than 35 MPH for 10 seconds and back to zero MPH 5 times.
- TCC brake switch input status has not changed from released to applied, or applied to released as displayed on Tech 1.
When Code P0703 is set, PCM will not allow 4th gear, cruise control or TCC operation. Code P0703 does not illuminate the Malfunction Indicator Light (MIL).
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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