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2000 Dodge Intrepid 2.7 purchased new has only 114k miles has never failed me once, until now. Had a dead battery and replaced. Ran great until last week when took 50 mi. trip, hot day, ran at 75 mph mostly, all indicators fine. After reaching destination, 1 hr later would not crank. Have done some research and concluded (guessed) PCM. Tested TPS with voltmtr no read out. Tried to crank again and odometer read P 1684, P 320, P 123. Any advice before tow and bend over mechanic? A 2000 Dodge Increpid is not worth major repair $$$.
 

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2000 Dodge Intrepid 2.7 purchased new has only 114k miles has never failed me once, until now. Had a dead battery and replaced. Ran great until last week when took 50 mi. trip, hot day, ran at 75 mph mostly, all indicators fine. After reaching destination, 1 hr later would not crank. Have done some research and concluded (guessed) PCM. Tested TPS with voltmtr no read out. Tried to crank again and odometer read P 1684, P 320, P 123. Any advice before tow and bend over mechanic? A 2000 Dodge Increpid is not worth major repair $$$.
P1684
The battery has been disconnected within the last 50 starts.

Caused by your previously dead battery - no worries.

P0320
No Crank Reference Signal at PCM
No reference signal (crankshaft position sensor) detected during engine cranking.

P0123 (M)
Throttle Position Sensor Voltage High
Throttle position sensor input above the maximum acceptable voltage.

Those two codes are a little contradictory for a common failure, but two things to try:
1) Disconnect the a.c. pressure transducer and see if it will start - they can fail and pull down the reference signals shared with other sensors, and sometimes the codes are not precise descriptions, but are a clue.
2) If no start with a.c. pressure transducer disconnected, you might try replacing the crank sensor - use only ones from a dealer. Aftermarket sensors are not trustworthy for these cars.

Could be a wiring issue or, as you indicated, a bad PCM but assume the latter if other things ruled out. Used PCM's are inexpensive but you will need the help of people here for making sure you buy a year- and feature-compatible one.
 

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Crankshaft sensor would cause no start. Often gives no code, but luckily you got one ;)
Haven't change one on the 2.7 myself, but wasn't hard on 3.5
 

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Discussion Starter #4
P1684
The battery has been disconnected within the last 50 starts.

Caused by your previously dead battery - no worries.

P0320
No Crank Reference Signal at PCM
No reference signal (crankshaft position sensor) detected during engine cranking.

P0123 (M)
Throttle Position Sensor Voltage High
Throttle position sensor input above the maximum acceptable voltage.

Those two codes are a little contradictory for a common failure, but two things to try:
1) Disconnect the a.c. pressure transducer and see if it will start - they can fail and pull down the reference signals shared with other sensors, and sometimes the codes are not precise descriptions, but are a clue.
2) If no start with a.c. pressure transducer disconnected, you might try replacing the crank sensor - use only ones from a dealer. Aftermarket sensors are not trustworthy for these cars.

Could be a wiring issue or, as you indicated, a bad PCM but assume the latter if other things ruled out. Used PCM's are inexpensive but you will need the help of people here for making sure you buy a year- and feature-compatible one.
The Dragonfly lives. Peva was on the money. Replaced crank sensor and runs like a sewing machine. Thanks big time for all the help. I had stopped by bendover repair shop and he said sounds like fuel pressure gauge - $125 tow & $665. to change out fuel pressure gauge. (FYI) Dragonfly: Drags uphill and fly's down them! Have a great day!
 
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