What does the 97+15 fault code mean?
2 Answers
97+15 is not a fault code, it indicates the exhaust brake valve is open and can be manually closed. Here are specific details about the exhaust brake valve: 1. Introduction: The exhaust brake valve is an auxiliary brake and a necessary supplement to the vehicle's service brake. It uses the engine as an air compressor to generate braking torque, thereby slowing the vehicle down. 2. Application: Generally installed in the exhaust pipe, it closes the valve when deceleration is needed to block the exhaust channel and achieve braking effect. It is mainly used in vehicles that operate in mining or mountainous areas or frequently drive in complex urban traffic conditions.
As an auto repair technician, I've dealt with many such trouble codes. For example, P0097 indicates low input from the intake air temperature sensor, which usually occurs due to sensor failure, wiring short circuits, or connection issues. This means the engine management system receives inaccurate temperature readings, potentially causing fuel mixture imbalance, increased fuel consumption, rough idling, or sluggish acceleration. When troubleshooting, it's recommended to start by inspecting connectors and wiring for wear, corrosion, or looseness. If you're technically capable, you can use a multimeter to check for abnormal sensor voltage. Replacing the sensor is often the most straightforward solution, but don't overlook wiring integrity tests. Regular cleaning around the sensor during maintenance can help prevent such issues. If the code appears, address it promptly to avoid developing into more serious engine problems. If you notice engine weakness while driving, pull over immediately for safety checks.
