What is the reason why the Changan CS75's one-button start fails to ignite?
3 Answers
The reasons why the Changan CS75's one-button start does not respond include operational errors, such as pressing the button without stepping on the brake, which will power the car but not start the engine; the gear not being in the P position; frequently placing the car key near electronic devices, causing interference with the low-intensity radio waves in the key; the car key running out of battery; or a malfunction in the car. More details are as follows: Solutions: Check the spark plugs. Since the spark plugs are crucial to the car's ignition system, and the ignition system is key to the engine's operation, the performance of the spark plugs affects the overall working performance and efficiency of the vehicle. Place the car in a warm environment, unscrew the spark plugs, clean the oil between the electrodes, and reassemble them before starting the car. A thorough solution is to inspect the ignition system to eliminate low ignition energy. At the same time, drip some engine oil into the combustion chamber to facilitate starting. After starting, take the car to a service station for a no-disassembly cleaning. In severe cases, disassemble and clean the cylinder head. Correct method for one-button start: After getting into the car, there is no need to take out the key; just keep it on your person. Following the traditional method, step on the brake and directly press the start button to start the car. However, after getting into the car, without stepping on the brake, press the start button twice in succession to initiate a full vehicle self-check, which takes a few seconds.
I also experienced the issue with the one-button start not working on my Changan CS75. I was in a hurry to get to work, pressed the button, but the car just wouldn't start. I started sweating from anxiety. Later, I thought it over carefully and found that many owners had similar experiences due to the key fob battery being dead—replacing it with a new one solved the problem immediately. Otherwise, it could be the car's main battery running low, especially on cold winter mornings when low temperatures can cause issues. Another common point is that you need to press the brake pedal firmly to start the car—sometimes I didn’t press it hard enough and ended up struggling for nothing. Occasionally, the anti-theft system misjudges the key signal, so try bringing the key closer to the start area or opening and closing the door to retry. These causes are simple to handle, but if you hear a clicking sound when starting, it might be a motor fault requiring professional repair—don’t delay it to avoid breaking down midway. My friend once suffered from this. In short, checking the battery and operation yourself saves both time and money.
Regarding the issue of one-button start failure, I often discuss it with friends. For the Changan CS75, it's mostly a key sensing problem. If the key battery is weak, the car can't detect the signal, so try replacing the battery. Secondly, if the car's main battery is low on power, the dashboard might show a warning light, especially in older cars or cold weather. Another possibility is improper operation, such as not pressing the brake pedal—you must step on the brake when pressing the start button. Or it could be aging components in the starting system, like a relay, resulting in no sound when trying to start. Simply put: start with the key, then check the car battery voltage with a multimeter if that doesn't work; if it still doesn't start, the circuit fuse might be blown. For prevention, I make it a habit to check the key and main battery condition before every rainy season, which can greatly reduce such troubles and avoid unnecessary hassles.
