what causes code p0620?

Asked by Apr 04, 2017 at 10:23 PM about the 2004 Ford F-250 Super Duty Lariat 4WD Extended Cab SB

Question type: Maintenance & Repair

5 Answers

86,685

P0620 - Generator Control Circuit Malfunction ---- Possible causes - Battery charge, Faulty Voltage Regulator, Faulty Generator, Generator harness is open or shorted, Generator circuit, poor electrical connection, Engine Control Module (ECM) controlled generator, Faulty ECM ---- Read more: https://www.autocodes.com/p0620.html

86,685

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.

thanks that's a lot I have 14 other codes +p0620

86,685

All those codes are a bummer but we can't help without knowing what they are.

21,135

Wow just saw this question and did not know when I answered the post with the 14 codes. Like I and F_O_R said you need to check this out first then to the Fuel Injection Control Module if everything else checks out good. You may just need a repair manual to get all the testing procedures and values to be able to test these. Last but not least expensive is the ECM itself. First thing I would do is check all the electrical connections and grounds to frame.

Your Answer

F-250 Super Duty

Looking for a Used F-250 Super Duty in your area?

CarGurus has 49,079 nationwide F-250 Super Duty listings starting at $1,899.

ZIP:

Ford F-250 Super Duty Experts

  • #1
    Tracy Hooks
    Reputation
    910
  • #2
    Tom Demyan
    Reputation
    700
  • #3
    kbro
    Reputation
    670
View All

Related Models For Sale

Used Ford F-350 Super Duty
375 Great Deals out of 27,127 listings starting at $3,000
Used Ford F-150
3,204 Great Deals out of 223,764 listings starting at $1,200
Used Chevrolet Silverado 2500HD
388 Great Deals out of 30,581 listings starting at $2,500
Used Dodge Ram 2500
153 Great Deals out of 5,471 listings starting at $2,661
Used GMC Sierra 2500HD
94 Great Deals out of 14,177 listings starting at $2,995
Used Chevrolet Silverado 1500
2,657 Great Deals out of 174,215 listings starting at $955
Used Ford F-450 Super Duty
43 Great Deals out of 2,768 listings starting at $4,995
Used GMC Sierra 1500
1,167 Great Deals out of 64,516 listings starting at $999
Used Toyota Tundra
668 Great Deals out of 34,023 listings starting at $1,500
Used Dodge Ram 3500
84 Great Deals out of 2,307 listings starting at $5,499
Used Dodge Ram 1500
417 Great Deals out of 11,117 listings starting at $950
Used Toyota Tacoma
682 Great Deals out of 45,330 listings starting at $2,500

Used Cars For Sale

2017 Ford F-250 Super Duty For Sale
23 Great Deals out of 26,916 listings starting at $24,368
2016 Ford F-250 Super Duty For Sale
49 Great Deals out of 2,230 listings starting at $18,700
2015 Ford F-250 Super Duty For Sale
15 Great Deals out of 2,433 listings starting at $11,958
2014 Ford F-250 Super Duty For Sale
5 Great Deals out of 1,016 listings starting at $8,988
2013 Ford F-250 Super Duty For Sale
35 Great Deals out of 991 listings starting at $8,997

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.