thanks i aiso have 14 other codes + p0620

Asked by Apr 04, 2017 at 11:01 PM about the 2004 Ford F-250 Super Duty Lariat 4WD Crew Cab SB

Question type: Maintenance & Repair

1 Answer

73,175

P0620 FORD - Generator Control Circuit...Possible causes; Battery charge, Faulty Generator, Generator harness is open or shorted, Generator circuit poor electrical connection, Engine Control Module (ECM) controlled generator, Faulty ECM...The Engine Control Module (ECM) has fault detection circuitry which monitors the state of the generator turn on signal circuit. If the fault detection circuit senses a voltage other than what is expected, this P0620 code will set. The voltage regulator also contains fault detection circuitry. If the regulator detects a problem, the regulator will ground the generator turn on signal circuit, pulling the voltage low. This also causes the ECM to set the P0620 code. Possible symptoms; Engine Light ON (or Service Engine Soon Warning Light) P0620 FORD Description; The Engine Control Module (ECM) uses the generator turn on signal circuit to control the generator. A high side driver within the ECM allows the ECM to turn the generator ON and OFF. When Generator operation is desired, the ECM sends a 5 volt signal to the voltage regulator via the generator turn on signal circuit. This causes the voltage regulator to begin controlling the generator field circuit. Once the Generator is enabled by the ECM, the voltage regulator controls generator output independently of the ECM. Under certain operating conditions, the ECM can turn Off the generator by turning Off the 5 volt signal on the generator, turn on signal circuit.

Your Answer

Ford F-250 Super Duty Experts

  • #1
    Tracy Hooks
    Reputation
    860
  • #2
    kbro
    Reputation
    650
  • #3
    Tom Demyan
    Reputation
    640
View All

Related Models For Sale

Used Ford F-350 Super Duty
349 Great Deals out of 23,406 listings starting at $2,990
Used Ford F-150
2,170 Great Deals out of 181,253 listings starting at $1,000
Used Chevrolet Silverado 2500HD
316 Great Deals out of 29,243 listings starting at $2,650
Used Dodge Ram 2500
151 Great Deals out of 5,052 listings starting at $2,999
Used GMC Sierra 2500HD
112 Great Deals out of 13,132 listings starting at $4,475
Used Chevrolet Silverado 1500
2,166 Great Deals out of 181,094 listings starting at $1,900
Used Toyota Tundra
446 Great Deals out of 33,526 listings starting at $1,999
Used GMC Sierra 1500
796 Great Deals out of 67,430 listings starting at $1,350
Used Dodge Ram 3500
85 Great Deals out of 2,162 listings starting at $4,993
Used Dodge Ram 1500
402 Great Deals out of 10,724 listings starting at $1,500
Used Ford F-450 Super Duty
40 Great Deals out of 2,501 listings starting at $8,481
Used Ford Mustang
760 Great Deals out of 41,952 listings starting at $1,300

Used Cars For Sale

2017 Ford F-250 Super Duty For Sale
10 Great Deals out of 28,243 listings starting at $20,521
2016 Ford F-250 Super Duty For Sale
22 Great Deals out of 2,085 listings starting at $21,967
2015 Ford F-250 Super Duty For Sale
22 Great Deals out of 1,951 listings starting at $12,688
2014 Ford F-250 Super Duty For Sale
14 Great Deals out of 869 listings starting at $12,950
2013 Ford F-250 Super Duty For Sale
22 Great Deals out of 803 listings starting at $9,900

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.