Diesel car OBD light on and lack of power?
2 Answers
Diesel car OBD light on indicates excessive exhaust emissions or engine malfunction. Here are the relevant details: Solutions: Replace the carbon dioxide sensor; Clean the three-way catalytic converter; Repair the three-way catalytic converter; Replace the three-way catalytic converter. Reasons for the fault light: When the vehicle starts for self-inspection, the engine fault indicator light turns on. If the engine fault indicator light stays on, it indicates there may be a mechanical fault in the engine. There are many reasons for this fault light to stay on, and it is generally difficult to self-diagnose and resolve. It is best to stop the vehicle and, if necessary, go to a 4S shop for inspection and repair. When the vehicle starts for self-inspection, the water temperature indicator light turns on, and there are two possible colors for the indicator light: blue light indicates the water temperature is too low, and red light indicates the water temperature is too high.
When driving my diesel pickup, I encountered this issue - the OBD light came on and the truck lost power. Start by checking these key components. Clogged fuel injectors are the most common culprit; diesel impurities can disrupt atomization, causing an immediate power drop. If the EGR valve gets stuck open, excessive exhaust gas recirculation will sap engine performance. Turbocharger failure is equally critical - worn blades or leaking pipes result in insufficient air intake. A completely blocked DPF (diesel particulate filter) can also choke the engine by restricting exhaust flow. I recommend first using a scanner to read the trouble codes - they'll likely be P-codes pointing to specific issues. Don't attempt DIY fixes as diesel systems operate under dangerous high pressure. Take it to a reputable repair shop for proper disassembly and inspection immediately, as prolonged neglect causes greater damage.
