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.
Test Procedure
2009 Ford Fusion SEL, 3.0 1, FWDSECTION Test Procedure
WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
- JD1 CHECK THE CKP SENSOR SIGNAL TO THE PCM
- Battery fully charged and starting system functioning properly.
- Ignition ON, engine OFF.
- Access the PCM and monitor the RPM PID.
- Crank the engine using the engine cranking diagnostic mode. Refer to DIAGNOSTIC MODES .
Is the RPM between 900 - 1,200 RPM?
Yes No The CKP, PCM, and harness are working properly.
RETURN to SYMPTOM CHARTS for further direction.For DTCs P0727 and P0C2F, GO to JD2. - JD2 CHECK THE TIMING COVER, CKP SENSOR, AND CRANKSHAFT PULSE WHEEL FOR OBVIOUS PHYSICAL DAMAGE
- Ignition OFF.
- Visually check the timing cover, CKP sensor, and crankshaft pulse wheel (outside the timing cover) for obvious physical damage.
Do any parts appear physically damaged?
Yes No REPAIR or INSTALL a new component as necessary.
CLEAR the DTCs. REPEAT the self-test.GO to JD3. - JD3 CHECK FOR PROPER CKP BIAS VOLTAGES IN THE PCM
- CKP Sensor connector disconnected.
- Ignition ON, engine OFF.
- Measure the voltage between:
(+) CKP Sensor Connector, Harness Side (-) Vehicle Battery CKP+ - Pin 1 Negative terminal CKP- - Pin 2 Negative terminal
Are the voltages between 1 - 3 V?
Yes No GO to JD4. GO to JD6. - JD4 CHECK THE CKP SENSOR RESISTANCE NOTE: The CKP sensor resistance values change significantly with temperature rise.
- Ignition OFF.
- Measure the resistance between:
(+) CKP Sensor Connector, Component Side (-) CKP Sensor Connector, Component Side CKP+ - Pin 1 CKP- - Pin 2
Is the resistance between 0.25K - 1K ohms?
Yes No GO to JD5. INSTALL a new CKP sensor. CLEAR the DTCs. REPEAT the self-test. - JD5 CHECK THE CKP HARNESS SHIELD GROUND NOTE: The harness shield protects the CKP signal from electrical noise and is grounded at one end, typically near the PCM.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.