Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2008 Jeep Wrangler 4WD V6-3.8LFACTORY OEM SERVICE PROCEDURE
Crankshaft Position Sensor
Component ID: 277
Component : SENSOR-CRANKSHAFT POSITION
Connector:
Name : SENSOR-CRANKSHAFT POSITION
Color : BLACK
# of pins : 3
Qualifier : (DIESEL)
Pin Circuit Description
1 K853 18DB/BR CKP 5 VOLT SUPPLY
2 K925 18DB/GY CKP SENSOR GROUND
3 K24 18BR/LB CKP SIGNAL
Connector:
Name : SENSOR-CRANKSHAFT POSITION
Color :
# of pins : 3
Qualifier : (GAS)
Pin Circuit Description
1 F855 18PK/YL 5 VOLT SUPPLY
2 K900 18DB/DG SENSOR GROUND
3 K24 18BR/LB CKP SIGNAL
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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