Here is a video on how to fix engine code p0449
ECM/PCM Power Relay Sense Circuit /Open
To test a P0688 OBD code, start by checking the vehicle’s battery and ensuring it has a proper charge, as low voltage can trigger this code. Next, inspect the engine control module (ECM) and its connectors for any signs of damage or corrosion. Use a multimeter to test the power and ground circuits to the ECM, ensuring they are functioning correctly. If these checks don't reveal issues, consider testing the ECM itself, as it may be malfunctioning.
Diagnose the problem and fix it
PO196 mercedes
How to fix Dodge grand engine code P1391
How to fix dodge grand engine code P1391
The engine code P0355 is for a malfunctioning ignition coil. This can be fixed by replacing the coil. It can be purchased at any auto parts store.
You do not need to fix the check engine light you need to fix the problem that is causing the check engine light to come on. Most auto parts will scan your ECU for free and tell you the code that has been set. This code will tell you what parts are being effected.
check your engine
I have a 2004 Acura rsx type s check engine light is on has code po172 how do I fix it n what r the possible causes
Trouble code P0171 means: Fuel System Too Lean - Bank 1