2000 Ford F-150 Test

Tiny
GC_STYLES
  • MEMBER
  • 2000 FORD F-150
  • 6 CYL
  • 2WD
  • MANUAL
  • 141,000 MILES
I have had my truck fixed for the codes the test said I needed. The mechanic had turned the check engine light off before the problem was fixed. After the repair I drove the truck 35-40 miles and the light went back on. Is it possible that the check engine light went back on because the codes were cleared before the repair and the computer recorded those results in the 35-40 mile road test or should we keep scratching our heads to find whatelse the problem could be?
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Sunday, January 18th, 2009 AT 4:24 AM

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Tiny
DAVE H
  • EXPERT
If the codes are deleted. Then the MIL will only come back ON when the fault re-occurs 2/3 times more depending on the fault. It does not matter when the codes are deleted before or after. When deleting, the faults are wiped from the computer memory ! Could you supply the codes, maybe we can supply a little more information regarding where to look?
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Sunday, January 18th, 2009 AT 6:27 AM
Tiny
GC_STYLES
  • MEMBER
The code is 1309. The code was cleared before I had the missfire fixed and the truck was driven while still in need of repair and after it was fixed I drove it the rest of the 40 miles and the light still came back on. Is it at all possible that the computer recorded this before the repair? I have had the CID censor and synchronizer fixed, the spark plug and wires replaced, and the fuel injector replaced.
If it isn't a coil what else could it possibly be?
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Monday, January 19th, 2009 AT 4:40 AM
Tiny
DAVE H
  • EXPERT
It is possible the PCM stored codes prior to the repair being carried out whilst driving vehicle. Take the vehicle to a good autoparts store (autozone etc.) Ask them to delete the codes for you. Most do this free. Then drive the vehicle again under normal operating conditions for the computer to recheck the systems. Whilst at the autostore write the codes down just incase they are different codes? Let me know.

41) Continuous Memory DTC P1309: Check Variable Reluctance CMP Sensor Output

This fault indicates MISFIRE MONITOR was disabled due to CMP sensor input signal to PCM malfunction. Possible causes for this fault are:
Camshaft Position (CMP) Sensor
CKP, ECT & MAF Sensors
Powertrain Control Module (PCM)
Turn ignition and all accessories off. Ensure PCM is connected. Using a DVOM, backprobe and measure A/C voltage between PCM harness connector CMP and PWR GND terminals. See WIRING DIAGRAMS. See Fig. 11 or Fig. 12. Start engine and vary engine speed. If A/C voltage does not vary more than.1 volt, replace CMP sensor. If A/C voltage varies more than.1 volt, check CMP sensor for correct installation. If CMP sensor is correctly installed, replace PCM. See appropriate REMOVAL, OVERHAUL & INSTALLATION article. Program PCM. See FLASH VEHICLE IDENTIFICATION BLOCK PROCEDURE
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Monday, January 19th, 2009 AT 6:49 AM

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