Power lose

1,695

Asked by Aug 03, 2015 at 06:28 PM about the 2003 Honda Accord LX

Question type: Maintenance & Repair

2003 LX Driving at high way speed tach and speedo drop to zero charge light comes on
trip indicator flashes .Retrieved code P0 685. Has anyone seen this. Could a dieing
battery cause this .Alternator out put 14 volts.

10 Answers

1,695

Also when the above take place engine is not affected at first only after the check engine light comes on.

20,745

P0685 ECM/PCM Power Relay Control Circuit Malfunction - ECM power control circuit is open or shorted - Failed ECM power relay - Failed ECM If its not the ecu, as it's been replaced, it's likely the relay where the issue lies. also, check your battery terminals and connections. a lose feed line could cause power issues.

1,695

Is the relay replaceable if so where is it.

1 out of 1 people think this is helpful.
1,695

If the ECM/PCM malfunctions or becomes shorted. That would be constant and not intermittent problem. After clearing the code it didn't reappear after starting the engine.

1 out of 1 people think this is helpful.
20,745

trebor66 ...and what..is the problem fixed..still have code???

1,695

Kelly here is what I have done. After having the problem this morning. I charged battery installed back in car started it up checked voltage at terminals (14 volts at idle).My drive to and from work 20 miles +/- at about 5 miles to battery light comes on again and the tack and speedo drop to 0 for a moment no affecting engine speed doing 70 on free way.After a few get off freeway and now the check engine light is on and off with a little hesitation. Made it home access the code as stated earlier cleared it and checked the connections behind the radio(it had issues of not turning on no volume).Checked the system voltage with scan tool it showed about 8 volts +/- .Charged battery checked the battery connection found negative side clamp tight but could still turn it scraped clean and made it tight so it could not turn. Started right up turned on the A/C and headlights shut it off restarted no problem and no code .Your thoughts.

20,745

at this point drive it again... short maybe when driving have to see..ill think on it.. i get so many questions...

1 out of 1 people think this is helpful.
Best Answer
3,125

Honda's can be very temperamental when it comes to voltage. Having had similar problems but different codes over the years, my advice would be to change the battery, and then if still problems, the alternator . I have seen many alternators test out as good when in fact they are not.

1 out of 1 people think this is helpful.
1,695

Update Kelly and JP1956. Drove it this morning did fine till about a mile to same issue, but no code.Read JP's comment about battery. Replaced battery drove home with A/C going ......NO ISSUES!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! I hope that fixed it thanks for all your help. Bottom line is a battery that is dieing could cause a lot of issues.The battery I replaced wasc 3 years old.

3,125

LOL hope you got a better grade of battery!

Your Answer

Add photo

Related Questions

Accord

Looking for a Used Accord in your area?

CarGurus has 82,781 nationwide Accord listings starting at $500.

ZIP:

Search Honda Accord Questions

Honda Accord Experts

#1 Tom Demyan
Tom Demyan
Reputation 2,010
#2 FordNut
FordNut
Reputation 1,600
#3 JP1956
JP1956
Reputation 1,440
View All

Related Models For Sale

Used Honda Civic
510 Great Deals out of 81,592 listings starting at $558
Used Toyota Camry
881 Great Deals out of 92,136 listings starting at $1,300
Used Nissan Altima
808 Great Deals out of 78,287 listings starting at $470
Used Honda Accord Coupe
129 Great Deals out of 10,277 listings starting at $1,100
Used Nissan Maxima
275 Great Deals out of 26,140 listings starting at $2,545
Used Toyota Corolla
762 Great Deals out of 75,282 listings starting at $1,790
Used Honda CR-V
698 Great Deals out of 57,125 listings starting at $1,600
Used Acura TL
267 Great Deals out of 7,182 listings starting at $2,200
Used Hyundai Sonata
519 Great Deals out of 50,230 listings starting at $1,300
Used BMW 3 Series
1,113 Great Deals out of 35,574 listings starting at $900
Used Kia Optima
409 Great Deals out of 30,098 listings starting at $1,700
Used Chevrolet Malibu
813 Great Deals out of 88,735 listings starting at $1,900
Used Toyota Avalon
223 Great Deals out of 13,770 listings starting at $1,475
Used Chevrolet Impala
595 Great Deals out of 29,137 listings starting at $1,300

Used Cars For Sale

2017 Honda Accord LX For Sale
10,311 listings starting at $18,973
2016 Honda Accord LX For Sale
18 Great Deals out of 969 listings starting at $14,895
2015 Honda Accord LX For Sale
30 Great Deals out of 960 listings starting at $12,863
2014 Honda Accord LX For Sale
102 Great Deals out of 2,632 listings starting at $5,890
2013 Honda Accord LX For Sale
14 Great Deals out of 681 listings starting at $9,900