Clearing codes wont correct the problem and limp mode is designed to protect motor and transmission - p0700 is a transmission problem
P0700 Transmission Control System Malfunction p0340 is camshaft position sensor malfunction
https://www.obd-codes.com/p0340 p0344 is also a camshaft position sensor circuit problem
P0344 Camshaft Position Sensor Circuit Intermittent your p430 is a cat converter problem
https://www.obd-codes.com/p0430 and p0888 is transmission relay problem these reasons are limp mode the knock can be fuel not burning correctly or a lower engine knock can mean you damaged a piston
SOURCE: trouble codes P0420 P1681 P0344
No I/P Cluster CCD/J1850 Message No CCD/J1850 messages received from the cluster
Received control module
SOURCE: trouble codes
Trouble Code: P0139
O2 (B1 S2) Slow Response
Trouble
Code Conditions:Engine started; vehicle driven at 20-55 mph with the
throttle open for 2 minutes; ECT at more than 158ºF (70C); catalytic
converter temperature is more than 1112F (600C); and EVAP purge is
active. O2 Sensor signal voltage switches less than 16 times from lean
to rich within 20 seconds during monitoring, or will compare the state
of change between the front and rear O2 Sensors and if the differences
are greater than a calibrated amount, the DTC will set. 3 good trips
are required to turn off the MIL.
Possible Causes:
Trouble Code: P0344
Camshaft Position Sensor Circuit Intermittent
Trouble
Code Conditions:Engine cranking or running; system voltage over 10.5v.
The PCM detected an intermittent loss of the CMP Sensor signal during
the period of 2.5 complete engine revolutions. The failure counter must
reach 20 before this code matures and a code is set.
Possible Causes:
Good luck....
No Camshaft Position Sensor Circuit Failure
Trouble
Code Conditions:Engine cranking or running, system voltage over 10v.
The PCM detected CKP pulses without detecting any CMP Sensor pulses for
5 seconds or 2.5 engine revolutions.
Possible Causes:
SOURCE: My Grand Voyager keeps getting codes P1776 P1784
Code p1776 is solenoid switch valve latched in low/reverse position. Valve is located in valve body not solenoid body. The possibilities are:
the low/reverse pressure switch itself is bad
the transmission control relay output circuit is open
the control circuit (sense) of the l/r switch is open, shorted to ground or shorted to voltage.
The control relay's output is on pin #6 of the 8-pin plug of the
transmission (red wire); you could verify that the wire has 12V on it
when you are idling (and I guess I would put it in gear with the brakes
applied). Also examine/shake the wire for intermittent connection
possibility.
The solenoid sense circuit connects pin # 8 (light blue) to pin #50 of
the transmission control module. You could check that connection and
monitor it for voltage to fluctuate between 0V and some measurable V
when the trans is shifting normally, and to loose that fluctuation when
it is not, which would verify the circuit is OK.
If that proved to be OK, then I would suspect the switch isn't responding and needs to be changed.
The solenoid box is removable after you drop the pan and remove the
valve body, and so it would not seem to be an horrendous expense
(compared to a rebuild). I haven't done this myself so I can't comment
on doing-it-yourself.
I would try to find a competent independent shop that know the Chrysler
trans and discuss it with them as to the cost of replacing the l/r
pressure switch as the alternative
The code p1784 is about the switch that monitors the hydraulic pressure for
operating the low/reverse clutch of the transmission. That clutch is
called into play for all forward gears as well as reverse, so it seems
reasonable if that clutch were not working that the car wouldn't move
in any gear. I would begin by making sure that there is sufficient
trans fluid by inspecting its dipstick. If needed only use ATF +4 but
don't overfill it. Also, just on a chance, take a look underneath to
see if you see any motion of either the left or right half axles (or
one moving, but one not) which would be another reason for no motion
due to a drive shaft disconnection or some such anomaly. Other than
that, your problem could be with the Low/Reverse solenoid switch in the
solenoid pack portion of the transmission (the box on the driver's side
of the trans) being stuck. That can be repaired without removing and
rebuilding the transmission so let us hope that may be the cause. I
would have the car towed to a good independent trans shop that has a
reputation for knowing how to service the Chrysler electronic
transmission.
DTC code p0700 is a transmission control system (mill light) which is related to the other two codes mentioned above.
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SOURCE: trans in limp mode with codes P0700, P0733 and P0734
1998 dodge caravan code P0700-Transmission Control System (Malfunction Indicator Lamp Request) How do I fix this?
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