What to Do When the Exhaust Temperature of a China VI Vehicle is Too High?
2 Answers
China VI vehicle exhaust temperature is too high should check the oxygen sensor. The following is a partial introduction about the high exhaust temperature of China VI vehicles: 1. Combustible mixture: If the concentration is too high, when this problem occurs, it is necessary to check whether there is a fault phenomenon in the oxygen sensor and fuel injection system. If the oxygen sensor fails, the vehicle cannot automatically control the amount of fuel injection. 2. Cylinder pressure: Abnormal ignition timing, you can use a decoder to read the data stream of the knock sensor, and then adjust the fuel injection amount and ignition timing according to the information of the data stream. It is normal for the exhaust temperature to rise when the vehicle is at high RPM. Generally speaking, when the vehicle is idling, the exhaust temperature is usually 30-50 degrees, and when the RPM is high, the exhaust temperature is around 60-70 degrees.
I previously encountered high exhaust temperature issues with my China VI diesel vehicle as well. It wasn't until the dashboard warning light came on during a long-distance trip that I noticed the problem. This is usually caused by a clogged DPF filter - China VI vehicles are equipped with this device to meet emission standards. When too much carbon accumulates, it automatically burns for cleaning, but if ineffective, the temperature spikes dramatically. I recommend checking the DPF status indicator. If clogged, try maintaining speeds above 80 km/h for about half an hour to allow system regeneration cleaning, or park and initiate manual regeneration mode following the manual instructions. Never ignore this issue - high temperatures can damage the exhaust system and may even cause spontaneous combustion. If unresolved, immediately visit a 4S shop to check sensors or fuel quality. Using premium diesel and regular highway driving for prevention is better practice.
