Engine light on, black smoke coming out exhaust on acceleration and fault codes

Hi there, I recently purchased a 2009 Land Rover freelander 2 td4 hse with 130000kms on the clock.. Now the engine light has come on and stayed on, there's black smoke coming out the exhaust when I accelerate and I've checked the fault codes and they are as follows: 1/ P0380 glow plug/ heater circuit A. 2/ P068b ECM/PCM power relay de energised too late. 3/ P0299 turbocharger/supercharger A underboost condition.. Car is driving fine but is making a humming almost rattling sound and just isn't sounding the healthiest.. Any ideas what could be the problem? Does it sound major/expensi
Experienced mechanics share their insights in answering this question :
The glow plug faults are most likely going to cause a hard start condition, which will be most noticeable when the engine is cold. The colder the engine, the more difficult it would be to start usually. Often times, glow plug failures aren’t noticed until it winter time. The relay fault is saying that there is a problem with the ECM relay, likely that the relay is staying on too long, which will need to be diagnosed. As far as your black smoke and bad noises, the underboost fault is the most likely cause of these issues. It could simply be a boost leak, which would cause a rich fuel mixture, resulting in black smoke and low power, or it could be a failing turbocharger, which would result in low power and black smoke as well. These are not the only two possibilities, simply the most likely. To find out for sure, you would need to have a qualified technician, such as one from YourMechanic, come to you and diagnose the check engine light and the smoke from tailpipe, after which they will be able to suggest an appropriate repair.

How to Identify and Fix Common car Problems ?

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Billowing black smoke is generally a sign that the fuel-air ratio in your engine is too rich. This means that the fuel injectors are either adding too much fuel or that the intake valves aren`t letting enough air in. This could be caused by a leaking fuel injector, a faulty fuel pressure regulator, or a bad air filter.
When this happens, this can be the result of many things such as faulty fuel injectors, a failing mass air flow sensor or a faulty fuel pressure regulator allowing too much fuel to be supplied to the combustion chamber to be burnt.
Can a faulty throttle body cause white smoke? No It can cause black smoke , White smoke is caused by coolant in the combustion chamber often caused by a blown head gasket or cracked cylinder head .
The carbon chucks could clog your EGR valve, which will result in loss of power, fuel inefficiency and emission of black smoke from your exhaust.
One of the telltale symptoms of a blown head gasket is white smoke from the exhaust. It`s important that the smoke is white because blue or black smoke can indicate a rich running engine or an engine that is burning oil.
Black exhaust smoke

When your exhaust pipe gives off black smoke, one of the things to get worried about are bad or worn out spark plugs. It means fuel burning in the combustion chamber is not being done 100 percent or burnt fully. It also means that air is not being well mixed with fuel to burn effectively.

The most common answer to, “Why is my car smoking but not overheating?” is that there`s a type of fluid that`s landed on the engine. This can be motor oil, fuel, transmission fluid, coolant, or even condensation. It can cause your engine to smoke because it`s burning off that fluid from the engine.
Black exhaust is a typically an indication of excessively burning fuel. This is often caused by an issue with your fuel injectors. If the injectors are clogged, it`s likely that the amount of air is insufficient for the combustion of fuel.
A worn fuel pump can cause the engine to receive an insufficient amount of fuel, leading to incomplete combustion and black smoke. Replace the fuel pump as necessary.
White or Gray Smoke from Exhaust – Just like if you see white smoke from under the hood, persistent white smoke usually indicates a coolant leak. If there`s only a little bit, it`s probably condensation. Blue Smoke from Exhaust – If you see blue or dark gray smoke, that`s an indication of burning oil.
Dirty EGR valve

Some of its gets put back to the combustion chambers. A dirty EGR valve won`t function as intended and black smoke will come out of the exhaust due to an imbalance of gas circulation.

You get black smoke from incomplete combustion because the excess fuel in the engine causes the black smoke. Deleting the EGR system does not cause incomplete combustion. Therefore, it will not change the color of the exhaust.
Black exhaust is a typically an indication of excessively burning fuel. This is often caused by an issue with your fuel injectors. If the injectors are clogged, it`s likely that the amount of air is insufficient for the combustion of fuel.
Dirty EGR valve

Some of its gets put back to the combustion chambers. A dirty EGR valve won`t function as intended and black smoke will come out of the exhaust due to an imbalance of gas circulation.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Engine light on, black smoke coming out exhaust on acceleration and fault codes
ANSWER : The glow plug faults are most likely going to cause a hard start condition, which will be most noticeable when the engine is cold. The colder the engine, the more difficult it would be to start usually. Often times, glow plug failures aren’t noticed until it winter time. The relay fault is saying that there is a problem with the ECM relay, likely that the relay is staying on too long, which will need to be diagnosed. As far as your black smoke and bad noises, the underboost fault is the most likely cause of these issues. It could simply be a boost leak, which would cause a rich fuel mixture, resulting in black smoke and low power, or it could be a failing turbocharger, which would result in low power and black smoke as well. These are not the only two possibilities, simply the most likely. To find out for sure, you would need to have a qualified technician, such as one from YourMechanic, come to you and diagnose the check engine light and the smoke from tailpipe, after which they will be able to suggest an appropriate repair.

Why can’t my check engine light come on after starting the car?
ANSWER : Hi there:

It’s nearly impossible to tamper with the ECU to disable error codes without having multiple mechanical issues exist. However, it is possible that there is a communications issue from the ECU to the dashboard or other electrical monitoring systems. The best way to know for sure is to have a professional mobile mechanic complete an electrical problems inspection first.

Traction light/reduced engine power and check engine light coming on
ANSWER : Hello. From what you describe, it would appear that your vehicle may be experiencing some sort of intermittent wiring or sensor issue. If the problem occurred again after driving over a bump, then it may be possible that a damaged or loose wire is shorting or having contact issues. A common issue that can cause stalling is a faulty crank position sensor or wiring. I would carefully examine the engine for any loose or damaged wires. If the Check Engine Light comes back on, I would recommend having the trouble codes scanned before resetting the computer.

Check Engine Light comes on after starting pickup
ANSWER : Hello there, thank you for asking about your 1992 Isuzu Pickup. A professional will have the correct equipment to read OBD1 codes. Retrieving the diagnostic trouble code(s) is the first place to start when diagnosing your vehicle. Increasing RPMs changes engine load, which can in turn affect many different sensors and components, causing the Check Engine Light to illuminate. The only way to narrow down the options and find the culprit is through in person diagnosis with an OEM compatible scan tool. A certified technician from YourMechanic can retrieve the OBD codes at your home or office.

Engine Light and AT light. Car goes into limp mode
ANSWER : Hello. Most of the time this is the result of a transmission failure. It is common for this transmission to have internal pressure problem which will cause these codes. It can also be a voltage problem so I always check that first. I check the voltage going to the transmission and if it is too low I repair that issue which is commonly the ignition switch. If the voltage is fine, then the transmission pressures need to be checked and it will more than likely need to be replaced. I would have a transmission specialist look into this.

Battery light goes on when I start car then turns off, if I rev engine light comes back until rpms go down. Abs goes comes on/off
ANSWER : Batteries can die due to faults in the charging system so ideally a suspected "faulty" battery should be load tested before a decision is made to condemn it. The only exception to this rule is if the battery is already clearly "old" (greater than 5 years) but even then once you put a new battery in, as a replacement for a "dead" battery, you have to comprehensively check out the charging system. Diagnostic Trouble Code P0460 will result in disruption of the dashboard fuel gauge’s ability to accurately report your tank’s fuel levels. The fuel gauge readings may be erratic, or read somewhere off scale. Vehicles equipped with a low fuel warning light feature may also suffer from erratic low fuel warnings in the event of a code P0460. Unless the P0460 code has been reported alongside other trouble code, all of the vehicle’s essential systems should otherwise function normally. I would recommend that you request a check engine light diagnostic to first resolve the fault causing the P0460 code to set. The check gas cap light warning light could be due a faulty gas cap and/or small leaks in the EVAP system.

My engine coolant light is coming on and after hitting a pot hole my thermostat light pops on, and after a few miles car run hot
ANSWER : Hi there. It is quite possible that you may have damaged the radiator when hitting the pot hole. Although there are protective shields located under the radiator itself, they are typically very thin and made of plastic in most cases. Sometimes the quick impact can cause cracking along the base of the radiator. When this happens, coolant will leak rather quickly. I would recommend two things, first, stop driving the vehicle until this issue is repaired. Second, contact a professional mobile mechanic to complete a coolant leak inspection so they can pinpoint precisely what is causing the leak and what repairs will be needed. This will allow you to have an accurate estimate for repairs.

on starting engine light & throttle control and traction control light comes on and car idols hard no codes when scanned
ANSWER : Hello, and thank you for writing in. Unfortunately the first technician is correct in that this can be cause by a wide variety of issues. Considering that it is intermittent, we can assume that there is either an electrical issue (sensor or bad connection), or that there is a particular part which is dirty or failing. There are a couple of ways you can approach this. One being that you attempt to clean, repair, and replace the many number of components that can cause this. A second being that you attempt to replicate the issue by unplugging sensors and trying various tests to try and narrow down what system is being effected. When dealing with a misfiring situation, you need to look into the air intake, ignition (spark), and the fuel systems first. One last consideration is to have the vehicle scanned by another type of code reader. They vary in brand, manufacture compatibility, and software. For more diagnostic help, contact our service department to schedule an appointment, or to obtain a quote once the issue is diagnosed.