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What Causes the Exhaust Brake Indicator Light to Illuminate?

1 Answers

LeahRose

07/24/25 5:14pm

If the exhaust brake warning light in your vehicle is illuminated, it may indicate that the exhaust brake is engaged. Check whether the exhaust brake switch is in the up-down or front-back position and turn it off. The exhaust brake, also known as an auxiliary brake, involves installing a pneumatic butterfly valve in the exhaust pipe to control the flow of exhaust gases, thereby limiting engine power to achieve braking effect. Below is an introduction to the exhaust brake: Introduction: Exhaust brakes are widely used in large diesel vehicles. A regulating valve is installed on the engine exhaust pipe, and closing this valve increases the pressure in the exhaust stroke, utilizing the generated negative pressure to obtain braking force. Usage Notes: (1) The engine brake cannot replace the service brake for emergency braking, nor can it be used for parking braking. (2) The engine brake can be used simultaneously with the service brake. (3) The throttle pedal should be at the zero position.

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