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

74,715

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
    880
  • #2
    Tom Demyan
    Reputation
    680
  • #3
    kbro
    Reputation
    670
View All

Related Models For Sale

Used Ford F-350 Super Duty
34 Great Deals out of 1,022 listings starting at $7,500
Used Ford F-150
538 Great Deals out of 10,095 listings starting at $1,800
Used Chevrolet Silverado 2500HD
11 Great Deals out of 1,011 listings starting at $4,000
Used Dodge Ram 2500
6 Great Deals out of 81 listings starting at $1,995
Used GMC Sierra 2500HD
21 Great Deals out of 1,040 listings starting at $3,995
Used Chevrolet Silverado 1500
190 Great Deals out of 10,701 listings starting at $399
Used GMC Sierra 1500
265 Great Deals out of 10,613 listings starting at $1,775
Used Toyota Tundra
41 Great Deals out of 1,087 listings starting at $2,140
Used Dodge Ram 3500
3 Great Deals out of 65 listings starting at $11,450
Used Dodge Ram 1500
44 Great Deals out of 520 listings starting at $3,488
Used Ford F-450 Super Duty
61 listings starting at $19,995

Used Cars For Sale

2017 Ford F-250 Super Duty For Sale
5 Great Deals out of 552 listings starting at $30,985
2016 Ford F-250 Super Duty For Sale
78 listings starting at $34,935
2015 Ford F-250 Super Duty For Sale
5 Great Deals out of 52 listings starting at $26,144
2014 Ford F-250 Super Duty For Sale
21 listings starting at $25,900
2013 Ford F-250 Super Duty For Sale
22 listings starting at $13,990

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.