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2001 Ford Expedition COPs Replaced - Now Showing P0182, P07E5, P0530 Error Codes? Help!

Model: 01 Expedition Fault Code: P2177 Posted: 2007-03-29 15:15

I recently replaced the coil-over-plugs (COPs) and spark plugs on my 2001 Ford Expedition. After installation, I tested the vehicle by flooring it from a stop. The SES light came on immediately. Upon arriving home, I connected an OBDII scanner and retrieved the following diagnostic codes: P0182, P07E5, and P0530. Initially, the vehicle displayed P0174 and another P017X code (likely P0171), but now only shows the newer codes. I'm wondering if the engine control module (ECM) has adapted to a new operating condition with the old COPs and needs a reset. I understand that P0182 means 'Fuel Temperature Sensor A Circuit Low Input,' but I have no idea how to diagnose or fix this. Similarly, P07E5 is listed as 'A/C Refrigerant Pressure Sensor Circuit Malfunction' — I can't find any reliable information on what this actually means or how to troubleshoot it. P0530 refers to a 'Crankshaft Position Sensor A Circuit Low Input,' which seems unrelated but may be related to ignition timing or sensor issues. The vehicle runs smoothly, and no performance symptoms are present. I'm seeking clarity on what these codes indicate and where I should start looking for repairs — especially since there's very limited information available online about these specific error codes in the 2001 Expedition model.

Related fault codes

P2177

Comments (4)

Anonymous 2007-03-29 16:27

If you're seeing P0171 and P0174, those are lean mixture codes. I'm not sure what OBDII tool you're using, but is the SES light off? The A/C refrigerant pressure sensor issue is relatively straightforward to check — ensure your AC system is properly charged and the sensor wiring is intact. As for the fuel temperature sensor, it's a bit surprising that Ford includes this sensor; it might indicate an underlying issue or simply be a non-critical warning.

Anonymous 2007-03-29 18:50

**UPDATE** I started the vehicle today and connected my OBDII scanner. Initially, I saw P0171 and P0174 flashing several times before transitioning to the codes listed above (P0182, P07E5, P0530). This cycle repeated a few times, then the codes disappeared entirely. I drove about 10 miles without any recurrence. At this point, I'm still uncertain of the root cause — it may be a temporary glitch or something more persistent.

Anonymous 2007-03-30 06:52

A likely culprit is either a dirty or faulty Mass Airflow (MAF) sensor or a vacuum leak. These are common causes of lean mixture conditions and should be checked first.

Anonymous 2007-03-30 15:13

You're right — Ford vehicles, especially older models like the 2001 Expedition, frequently exhibit lean code issues. Start by checking for vacuum leaks. Intake gaskets (especially lower ones) and upper plenum gaskets are common failure points that aren't always visible during inspection. To test: spray a small amount of carburetor cleaner on a cold manifold while the engine is off — any noticeable drop in short-term fuel trim readings into negative double digits indicates a vacuum leak. If no leaks are found, consider a failing MAF sensor. Cleaned MAFs often don't resolve the issue. A healthy MAF should read approximately 155–160 Hz at sea level (barometric pressure), decreasing slightly with altitude (around 150 Hz at 1200 ft). When dirty, the filament misreads airflow, triggering lean codes like P0171 and P0174.