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Engine limp mode when warm

3K views 10 replies 5 participants last post by  rghavana 
#1 ·
03 dodge cummins, code p0483 , fan clutch replaced and codes cleared but still reads the code, fan is working after replacement, so my problem is when the truck gets up to temp it goes into limp mode runs amazing colder, 35 lbs of boost no problem and egts arent to high, but when warm, it has no power rpms still climb but its not like its doing anything with max 20 lbs boost and egts running over 1000,
 
#2 ·
P0483
Need to properly diagnose, usually wiring issues
Possible causes are
OTHER DTC’S
(Y5) SIGNAL CIRCUIT SHORT TO 5-VOLT SUPPLY (Y3) CIRCUIT
(Y5) SIGNAL CIRCUIT OPEN FROM ECM TO FAN CLUTCH ASSEMBLY
(Y3) SUPPLY CKT OPEN FROM ECM HARNESS CONNECTOR TO FAN CLUTCH HARNESS CONNECTOR
INTERMITTENT CONDITION
(Y5) SIGNAL CIRCUIT SHORTED TO RETURN IN THE HARNESS
(Y5) SIGNAL CIRCUIT SHORTED TO VOLTAGE
(Y5) SIGNAL CIRCUIT IN ECM SHORTED TO GROUND INSIDE ECM
(Y5) SIGNAL CIRCUIT SHORTED TO VOLTAGE IN THE ECM
(Y3) 5-VOLT SUPPLY CIRCUIT IN ECM
 
#3 ·
code p0483 ,
fan clutch replaced and codes cleared but still reads the code,
fan is working after replacement, runs amazing colder,
Is it an OEM fan clutch?

The code came back after warmup?

ECM had issue (didn't like) with the fan speed an hence P0483.:wink2:
 
#6 ·
Hi that maybe true with some aftermarket fans, but i have a aftermarket one and no codes and works fine and its been installed for 1 1/2 years.
 
#8 ·
Hi I bought from a jobber here in Canada, I don’t remember the brand. Sorry not much help!
 
#11 ·
P0483
properly diagnose, usually wiring issues
Possible causes are
OTHER DTC’S
(Y5) SIGNAL CIRCUIT SHORT TO 5-VOLT SUPPLY (Y3) CIRCUIT
(Y5) SIGNAL CIRCUIT OPEN FROM ECM TO FAN CLUTCH ASSEMBLY
(Y3) SUPPLY CKT OPEN FROM ECM HARNESS CONNECTOR TO FAN CLUTCH HARNESS CONNECTOR
INTERMITTENT CONDITION
(Y5) SIGNAL CIRCUIT SHORTED TO RETURN IN THE HARNESS
(Y5) SIGNAL CIRCUIT SHORTED TO VOLTAGE
(Y5) SIGNAL CIRCUIT IN ECM SHORTED TO GROUND INSIDE ECM
(Y5) SIGNAL CIRCUIT SHORTED TO VOLTAGE IN THE ECM
(Y3) 5-VOLT SUPPLY CIRCUIT IN ECM
 
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