No, not all automatic transmission faults will be revealed by diagnostics. Some faults may be misinterpreted or may not be detected due to limitations of diagnostic tools.
Below are some examples of automatic transmission faults that may not be displayed during diagnosis:
* Mechanical Damage: Broken gears, worn bearings or warped shafts may not be detected by the diagnostic scanner.
* Clutch Slippage: Clutch slippage can be difficult to detect, especially in the early stages.
* Valve body problems: Valve body problems, such as stuck valves or leaks, can affect the operation of the automatic transmission, but may not be detected by diagnostics.
* Faulty wiring or sensors: Problems with wiring or faulty sensors can cause problems with the automatic transmission that will not show up during diagnostics.
* Contaminated or worn fluid: Contaminated or worn automatic transmission fluid can reduce performance and service life, but is not always detected during diagnostics.
Therefore, it is important to consider the full picture of symptoms and service history when diagnosing an automatic transmission problem. In addition to diagnostics, the mechanic may use other methods such as fluid pressure testing, valve body health checks, and a thorough inspection to identify hidden problems.