Question about 2002 Jeep Grand Cherokee
COde PO725 Engine Speed Sensor circuit malfunction. Tach jumps and cover blew off.
Trouble Code: P0725
A/T Engine Speed Sensor Circuit Malfunction
Check for trouble codes related to the CKP Sensor
CKP Sensor signal circuit open, shorted to ground or to power
CKP Sensor is damaged or has failed (open or shorted)
Intermittent wiring or connector problems
PCM has failed
Posted on May 24, 2009
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Posted on Jan 02, 2017
Tips for a great answer:
DTC P0725 - ENGINE SPEED SENSOR CIRCUIT
When Monitored: Continuously after a ignition key is turned from the OFF to RUN
position and/or key is turned from the CRANK to the RUN position.
Set Condition: The code is set when the engine speed sensed by the Transmission Control
Module (TCM) is different than the engine speed reported by the Powertrain Control
Module (PCM) over the Communication Buss.
CHECKING SYMPTOMS AND POSSIBLE CAUSES
LOW BATTERY VOLTAGE
BAD CONNECTIONS AT VARIOUS CONNECTORS
CRANK POSITION SENSOR SIGNAL OPEN
CRANKSHAFT POSITION SENSOR GROUND CIRCUIT OPEN
TCM CRANK POSITION SENSOR MONITORING DEFECTIVE
Hope this helps.
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