2003 Ford Expedition Check Engine Soon Light

A check engine light can indicate a broad spectrum of problems with your 2004 ford expedition.

2003 ford expedition check engine soon light.

Connect your obd ii scanner into the diagnostics port. The first step in troubleshooting the check engine light is to read the fault codes with an obd ii scanner. Flashing check engine light ford expedition while a majority of the time the flashing check engine light is going to be caused by a misfire related to your expedition s ignition system or fuel system as stated above there are other issues that can cause it. Turn on the ignition by pressing the start button without pressing the brake pedal.

Locate the diagnostics port under the dashboard of your ford. If the light stays on the fault is ongoing. If it goes off the problem is intermittent but the computer will store the code for later diagnostics. Ford expedition check engine light diagnosis.

5 00 hrs 1 40 hrs 2000 ford expedition 5 4l v8 xlt. How to reset a ford expedition s check engine soon light by richard rowe. When i check the codes it says p0171 bank 1 lean and p0174 bank 2 lean it had 2 more codes saying 02sensors stuck lean i replaced all the 02 sensors cleared the codes they all came back i just now checked the codes to get the s and thats when the 02 sensor codes had cleared what else should i check or change. Your timing chain could have jumped.

If anything goes wrong with the engine the computer will illuminate the check engine light cel. I have 2003 ford expedition the service engine soon light is on.