Welcome to DF
Here is a tsb that may help, But you should have the cluster checked for codes and calibrate if needed.
DATE: Nov. 2, 2001
Fuel Gauge Indicator Visibly Drops 1/4 To 1/2 Tank While Driving
This bulletin involves inspecting the Leak Detection Pump (LDP) air filter hose
for a kink and repositioning the hose if required.
2001 - 2002 (RS) Town & Country/Caravan/Voyager
NOTE: THIS BULLETIN APPLIES TO RS VEHICLES BUILT BEFORE
SEPTEMBER 30, 2001.
With the fuel tank at 3/4 full or less, and after driving the vehicle for 10 minutes or at
least 6 miles, the fuel gauge indictor may visibly drop 1/4 to 1/2 of a tank providing
an erroneous reading. The fuel gauge indicator returns to a correct reading after the
engine has been shut off and the vehicle has sat for 5 to 8 minutes.
Due to the nature of this issue, perform the Repair Procedure if a vehicle operator
complains that the fuel gauge visibly drops while driving.
THIS REPAIR IS COMPATIBLE WITH DAIMLERCHRYSLER’S MOBILE SERVICE PROGRAM AND
DOES NOT REQUIRE HOISTS OR OTHER FULL SERVICE FACILITY SPECIAL EQUIPMENT.
WARNING: THIS REPAIR INVOLVES WORK NEAR THE EXHAUST MANIFOLD
CROSSOVER TUBE. ON VEHICLES EQUIPPED WITH V-6 ENGINES,
WAIT FOR THE ENGINE TO COOL BEFORE PERFORMING THIS REPAIR
OR PERSONAL INJURY MAY RESULT.
1. Open and support the hood.
2. Use a shop light to inspect the LDP air filter hose for kinks or restrictions
as shown in (Fig. 1). The LDP air filter hose is located underneath and to
the left of the power brake booster. Move aside any wiring or hoses that
prevents a clear view of the entire LDP air filter hose.
Fig. 1 LDP AIR FILTER HOSE
1 - ABS CONTROL MODULE (ABS EQUIPPED VEHICLE)
2 - LDP AIR FILTER
3 - LDP AIR FILTER HOSE - INSPECTION AREAS
3. If the hose is kinked, detach the hose from the filter and reposition it in
a manner that eliminates the restriction.