![]() ![]() That being so, you replace the sensor only for it to produce another error code. "It might mean ‘faulty sensor’ which might be true but the environment it’s operating in might actually be at fault or it may have a poor connection. "The fault code reflects the symptom but not its cause," he says. In some cases, the codes can reveal a quick fix, but that's not always the case, according to Frank Massey, an expert in vehicle diagnostics whose company, Auto Inform, trains vehicle technicians in their use. Our guide to the most common causes, below, explains what to do next. You can then use online manuals to work out what the codes mean. Particularly popular are Bluetooth readers, which plug into the data port (called OBD-II) and communicate wirelessly with your phone, allowing the codes to be downloaded to your device. These diagnostic readers can be bought by anyone and are often universal, so will work for any make of car. Garages download these using code readers that plug into a data port, fitted to every modern car. When a check engine light illuminates, your car also generates error codes, which indicate the specific problem. Don't drive the car but call your breakdown recovery provider to have the car checked or recovered to a qualified garage that can investigate the issue. If you see this, you should stop when it’s safe to do so, in order to prevent serious damage. Some cars have a red check engine light that illuminates in the case of a serious fault. You should immediately drive to a garage, using the accelerator gently. Continued driving could overheat and damage the expensive catalytic converter, which is part of the exhaust system. Flashing engine management light (amber)Ī flashing check engine light is likely to indicate a misfire in the engine, so the car may judder and could sound rough. It's always best to check your handbook for advice specific to your car. In most cases, you'll be able to continue your journey, but you should get your car examined as soon as possible. This is an advisory warning, which indicates an engine issue that affects emissions. The meanings below are typical: Amber engine management light Check your vehicle handbook for the precise definitions for your specific car. Some cars display the engine warning light in different colours according to how serious the problem is. Read on for more information about the common causes and how to work out what the light means. If you’re on a motorway, pull over safely, stop and call a breakdown rescue company. Depending on the problem, the car may make that decision for you by going into so-called 'limp home mode', where its speed is reduced almost to a crawl. If the car is still driveable and making no obvious noises, reduce your speed and drive it to your local garage. If they report the wrong data, the ECU will trigger the engine warning light. ![]() It takes its information from sensors dotted around the engine and exhaust system. The light is connected to the car's main computer, called the engine control unit (ECU). It could be alerting you to one or more issues, typically linked to exhaust emissions. The engine management light (EML) doesn't indicate a specific fault. What does the engine management light mean? If you're considering changing over to an electric car, you can check out our guide to electric car warning lights. Initial actions can vary from stopping immediately at the side of the road to visiting to a local garage for a diagnosis as soon as you are able to. A red engine management light means it’s time to pull over and call your breakdown service, or at least check the meaning of the light in your vehicle handbook. Sometimes they get locked up.An orange or amber light doesn’t usually mean you should stop immediately, but some cars have a red warning light for more serious issues. First quick thing to do is simply disconnect battery power for 5 mins and allow the body controller to cold boot. Since there are some other issues too you may have a problem with a main firewall connector, or a main connector at the body controller itself. If the air horn works/PDL works then you know at least the ground is ok for the pack. In this pack should also be the air solenoid for the air horn and PDL. The solenoid pack uses the same ground for all solenoids. It will fault the circuit when it detects too much, or not enough electrical current is being used by the circuit, indicating either an open or short. The body controller sends out 12 volts for each individual air solenoid on the solenoid pack. Any time a switch blinks rapidly, there is fault. Basically one solenoid blocks system air, and the other sends signal to the valve to actually dump it, or something like that. They use a goofy two solenoid set up for suspension dump, so it can be tricky to troubleshot. ![]()
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