P1237 Fuel Pump Secondary Circuit Malfunction - Ford Focus Forum, Ford Focus ST Forum
Ford Focus Forum
HomeContact UsAbout UsGalleryDiscussion ForumsMarketplace


Go Back   Ford Focus Forum, Ford Focus ST Forum > Ford Focus Tech Discussions > General Technical Chat

General Technical Chat This section is for technical discussions relating to general maintenance, electrical issues, engine trouble, and recalls.

Search This Forum | Image Search | Advanced Search    
Ford Focus Tire & Wheels FocusFanatics Merchandise

Reply
 
Thread Tools Display Modes
Old 12-04-2004, 01:15 PM   #1
xn85turbo
Focus Rookie
 
Join Date: Dec 2004
Fan#: 16269
Location: Maryland
Posts: 1
FF Reputation: 1 xn85turbo Good Standing Member
Buy-Sell-Trade Rating: (0)
P1237 Fuel Pump Secondary Circuit Malfunction

P1237 Fuel Pump Secondary Circuit Malfunction


I got this ODBII error on a 2000 focus. Does anyone know where this is so I can fix it. I called Ford and they said it's wiring not a relay, is this correct?


xn85turbo is offline  
    Reply With Quote
Sponsored Links
Advertisement
 
Old 12-05-2004, 07:44 AM   #2
slammedfoci
Focus Addict
 
slammedfoci's Avatar
 
Join Date: Dec 2003
Fan#: 2137
Location: birmingham,AL
What I Drive: 2000 Bright Amber Metallic ZX3

Posts: 1,099
FF Reputation: 1 slammedfoci Good Standing Member
Buy-Sell-Trade Rating: (3)
Yeah, A circuit would be refurring to wires. You may have a wire loose or a ground thats not grounding good. As to were it is, I do not really know. You will have to start looking around the fuel pump and go along those wires looking for cuts or something of that nature.
__________________
PERFORMANCE:Aem cai, Aem air bypass valve, Autolite double platinum plugs,Ford Racing 9mm plug wires, Full magnaflow cat back exhaust, Fc race header, Focus Central Flex Pipe, Fc 65mm throttel body ,Fc strut brace, Prothane lower mount inserts, Prothane front and rear swaybar bushings and rear endlink kit, Fc spark plug cover
EXTERIOR: Aerospeed lowering springs, Sidemarkers, Svt upper grill, 03 Grey Headlights, Flat Black Stock 15s, APC Gen. 2 Mirrors, Euroglow Xenon Headlights
INTERIOR: Fc short shifter, Auto meter duel a-piller guage pod, Auto meter phantom oil pressure and Volt gauges, Ford racing tach w/shift light, SVT alum. pedals, Rear seat removed
slammedfoci is offline  
    Reply With Quote
Old 12-06-2004, 07:42 AM   #3
soffiler
Registered User
 
soffiler's Avatar
 
Join Date: Sep 2003
Fan#: 372
Location: Sterling, CT
What I Drive: '03 ZX3 PZEV 5-spd Twilight Blue; '97 F-250 4x4 w/ 351 V8 & AT

Posts: 1,236
FF Reputation: 1 soffiler Good Standing Member
Buy-Sell-Trade Rating: (0)
Okay, here ya go. This is straight from a web forum for professional technicians called iATN. It is a subscription-only site.

P1237=Fuel Pump Secondary Circuit (Fuel Pump Driver Module)

Electronic Returnless Fuel Systems (ERFS) utilize a Fuel Pump Driver Module (FPDM) to control fuel pressure. The PCM uses a Fuel Rail Pressure Sensor (FRP) for feedback. The PCM outputs a duty cycle to the FPDM to maintain the desired fuel rail pressure. During normal operation, the PCM will output a FP duty cycle from 5% to 51%. The FPDM will run the fuel pump at twice this duty cycle, e.g. if the PCM outputs a 42% duty cycle, the FPDM will run the fuel pump at 84%. If the PCM outputs a 75% duty cycle, the FPDM will turn off the fuel pump.

If the FPDM does not out any diagnostic signal, (0 or 100% duty cycle), the PCM sets a P1233 DTC. This DTC is set if the FPDM loses power. This can also occur if the Inertia Fuel Switch is tripped.

If the FPDM outputs a 25% duty cycle, it means that the fuel pump control duty cycle is out of range. This may occurs if the FPDM does not receive a valid control duty cycle signal from the PCM. The FPDM will default to 100% duty cycle on the fuel pump control output. The PCM sets a P1235 DTC.

If the FPDM outputs a 75% duty cycle, it means that the FPDM has detected an open or short on the fuel pump control circuit. The PCM sets a P1237 DTC.

Last edited by soffiler; 12-06-2004 at 01:48 PM.
soffiler is offline  
    Reply With Quote
Old 12-06-2004, 07:02 PM   #4
ModemJunki
Focus Enthusiast
 
ModemJunki's Avatar
 
Join Date: Jul 2004
Fan#: 10639
Location: Illinois
What I Drive: '02 Red on Black SVTF - tuned by Hypnotic

Posts: 420
FF Reputation: 3 ModemJunki Good Standing Member
Buy-Sell-Trade Rating: (1)
Props to soffiler for the detailed answer. I'm filing that one away.
__________________
Keep the revs up!
ModemJunki is offline  
    Reply With Quote
Old 03-21-2006, 09:59 AM   #5
mdillian3690
Focus Rookie
 
Join Date: Mar 2006
Fan#: 33404
Location: mi
Posts: 1
FF Reputation: 1 mdillian3690 Good Standing Member
Buy-Sell-Trade Rating: (0)
P1237

I have this code on my 1999 Mystique 2.5l build date 7/99. I replace the fuel pump and now even with the key in the on position, the pump runs forever. I will state a guy a work, jump the two ground wires at the connector (to the fuel pump) together. Could this be causing the CEL? Thanks!
mdillian3690 is offline  
    Reply With Quote
Old 03-21-2006, 05:02 PM   #6
ModemJunki
Focus Enthusiast
 
ModemJunki's Avatar
 
Join Date: Jul 2004
Fan#: 10639
Location: Illinois
What I Drive: '02 Red on Black SVTF - tuned by Hypnotic

Posts: 420
FF Reputation: 3 ModemJunki Good Standing Member
Buy-Sell-Trade Rating: (1)
Wow, old thread!

You'll find a lot more experience with the Contour/Mystique here:

http://www.contour.org/

Sorry I can't be more helpful.
__________________
Keep the revs up!
ModemJunki is offline  
    Reply With Quote
Old 08-10-2014, 05:01 PM   #7
700whpfocus
Focus Addict
 
Join Date: Nov 2006
Fan#: 40899
Location: ft laud, FL
What I Drive: 2000 zx3 twillight blue focus

Posts: 1,254
Points 5,338, Level 46
Points: 5,338, Level: 46 Points: 5,338, Level: 46 Points: 5,338, Level: 46
Level Up 94% Completed
Level up: 94% Level up: 94% Level up: 94%
Forum Activity 1%
Activity: 1% Activity: 1% Activity: 1%
FF Reputation: 2 700whpfocus Good Standing Member
Buy-Sell-Trade Rating: (11)
i am having this error code. p1237. wold this also be casing the pump not to turn on
700whpfocus is offline  
    Reply With Quote
Old 08-10-2014, 11:02 PM   #8
sailor
"Elder"
 
sailor's Avatar
 
Join Date: Jun 2008
Fan#: 57268
Location: Williamsville, NY
What I Drive: 2004 Pitch Black ZTS 2.3 5spd.

Posts: 14,423
Points 9,710, Level 66
Points: 9,710, Level: 66 Points: 9,710, Level: 66 Points: 9,710, Level: 66
Level Up 15% Completed
Level up: 15% Level up: 15% Level up: 15%
Forum Activity 99%
Activity: 99% Activity: 99% Activity: 99%
FF Reputation: 70 sailor Excellent Standing Member
Buy-Sell-Trade Rating: (0)
Read the code in this thread & also here:http://www.focusfanatics.com/forum/s...ad.php?t=59286 for more description.

Fuel pump or it's wiring is the fault being reported.
__________________
"Rubber Side Down"

S.R. #275
sailor is online now  
    Reply With Quote
Reply

Bookmarks & Social Networks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 12:41 AM.


Copyright 2002-2014 FocusFanatics.com. All Rights Reserved : Terms of Use : Privacy Policy : Advertise Information

Focus Fanatics Ford Focus Forum offers many fun ways for you to engage with other Ford Focus Owners from across the world. Whether it be about the aftermarket performance modifications, technical how-to's, European tuned suspension or awesome fuel economy similar to the Acura TLX or Fiesta ST. You can find all Ford Focus and Focus ST related information here. Join our Ford Focus discussion forums and chat with local Focus enthusiasts in your area.