DTC Code P0282 – What does this code mean for Mercedes?

<ul> <li><b>Engine Light ON (or Service Engine Soon Warning Light)</b>: The engine control module (ECM) detects an issue with the injector circuit for cylinder 8, triggering the warning light. This indicates a potential problem with the fuel injection system.</li> <li><b>Engine Misfire</b>: A malfunctioning injector in cylinder 8 can cause the engine to misfire. This is due to improper fuel delivery, which disrupts the combustion process.</li> <li><b>Engine Run Rough</b>: The engine may run rough or exhibit irregular idling due to the injector circuit issue. This is often caused by inconsistent fuel delivery to cylinder 8.</li> <li><b>Low MPG</b>: Fuel efficiency may decrease as the engine compensates for the injector circuit problem. This can lead to increased fuel consumption and lower miles per gallon (MPG).</li> </ul>

<ul><li>Dirty fuel injector 8 can restrict fuel flow, causing improper combustion.</li><li>Faulty fuel injector 8 may fail to deliver the correct amount of fuel.</li><li>Plugged fuel injector 8 can block fuel delivery, leading to misfires.</li><li>An open or shorted fuel injector 8 harness can disrupt the electrical signal needed for proper injector operation.</li><li>Poor electrical connection in the fuel injector 8 circuit can cause intermittent or no injector function.</li></ul>

<ul> <li><b>Initial Scan</b>: Use an OBD-II scanner to confirm the presence of DTC P0282 and check for any additional codes.</li> <li><b>Visual Inspection</b>: Inspect the wiring and connectors for Cylinder 8 injector for any signs of damage, corrosion, or disconnection.</li> <li><b>Injector Flush</b>: Perform an injector flush to clean any potential clogs in the fuel injector for Cylinder 8.</li> <li><b>Resistance Check</b>: Measure the resistance of the Cylinder 8 injector using a multimeter. Compare the reading to the manufacturer's specifications.</li> <li><b>Power Supply Check</b>: Verify that the injector is receiving the correct voltage by checking the power supply to the injector with a multimeter.</li> <li><b>ECU Check</b>: Inspect the Engine Control Unit (ECU) for any faults or issues that could be affecting the injector circuit.</li> <li><b>Injector Replacement</b>: If all previous steps are completed and the issue persists, replace the Cylinder 8 injector.</li> <li><b>Final Test</b>: Clear the DTC code and perform a test drive to ensure the issue is resolved and the code does not reappear.</li></ul>

<p>The DTC code P0282 indicates a 'Cylinder 8 Injector Circuit Low' issue in Mercedes vehicles. This is a critical problem as it affects the fuel injection system, leading to poor engine performance, misfires, and potential engine damage.</p><ul><li><b>Immediate Actions:</b> Inspect the injector wiring and connectors for damage or corrosion.</li><li>Test the injector for proper operation and replace if necessary.</li><li>Check the Engine Control Unit (ECU) for faults.</li></ul><p>Delaying repair can result in severe engine damage and increased repair costs.</p>