Troubleshooting DPFE values check vacuum lines
Disclaimer. I do not have a set of service manuals for the 95 MY. So, there is a little bit of "faith" going on here. The 2002 reference has the DPFE hot idle values as .95-1.05. So at 1.38 it is slightly out of this range.
Here's my take. DOUBLE CHECK the vacuum lines to/from the DPFE sensor. The exhaust gas is hard on rubber parts. The lines will dry up and leak. When they do, an exhaust leak is the result. More importantly, the DPFE will read incorrectly.
Next there is a LEAN code. Is this from the same bank as the EGR tube is on? Consider that an exhaust leak will cause a lean code due to excessive air entering the exhaust and making the PCM "Think" the bank is lean.
SO....is it possible there is a bad vacuum line to/from the DPFE sensor that is causing BOTH problems?
Next just to be sure, CLEAN the electrical connector to the DPFE sensor. Use electrical contact cleaner (or MAF cleaner). Lightly grease the contacts with silcone di-electric grease (the same kind used for spark plug).
2003 GT Convertible (sold & missed)
2000 GT coupe (Craigslist project. Fixed. Now my DD). Windsor to Romeo swap.