1998 Chrysler Town and Country P1788 MOD 41 Code

DONLIVA

MEMBER
1998 CHRYSLER TOWN AND COUNTRY

Transmission problem
1998 Chrysler Town and Country 6 cyl Automatic 87000 miles

My 1998 T&C was converted to a wheelchair accessible van (electric side entry ramp, etc. Etc.). Recently I had trouble putting it in parking and took it to my neighborhood garage where they replaed the shifting cable; it works but still have some play on it.

I took it to a car shop where they diagnosed via a computer "P1788 Mod 41" and "P0700 Mod 40". What does this mean? Should I get rid of the van?

2 Replies

OBXAUTOMEDIC

MECHANIC
3,711 POSTS

Code - P1788:

P1788-2/4 HYDRAULIC PRESSURE TEST FAILURE
When Monitored and Set Condition:
P1788-2/4 HYDRAULIC PRESSURE TEST FAILURE
When Monitored: In any forward gear with engine speed above 1000 RPM shortly after
a shift and every minute thereafter.
Set Condition: After a shift into a forward gear, with engine speed > 1000 RPM, the TCM
momentarily turns on element pressure to the clutch ckts that don't have pressure to
identify the correct pressure sw closes. If the pressure sw does not close 2 times the code
sets.
POSSIBLE CAUSES
LOSS OF PRIME P1791 PRESENT
RELATED DTC'S PRESENT
TRANSMISSION FLUID LEVEL
INTERMITTENT WIRING AND CONNECTORS
TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT OPEN
2/4 PRESSURE SWITCH SENSE CIRCUIT OPEN
2/4 PRESSURE SWITCH SENSE CIRCUIT SHORT TO GROUND
2/4 PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE
INTERNAL TRANSMISSION
TCM - 2/4 HYDRAULIC PRESSURE

Code P0700:

Transmission Control System Malfunction(Tranny Computer)

Before doing anything I would have the Shift Cable readjusted.