What is wrong with my 2002 Dodge Ram 1500 if scanner can't read codes?


Asked by Sep 18, 2014 at 01:10 PM about the 2002 Dodge Ram 1500 SLT Quad Cab SB 4WD

Question type: Maintenance & Repair

My 2002 Dodge Ram 1500 4.7 liter V-8 had an engine replaced with the same size engine
by the previous owner.  The check engine light is on but my mechanic who is specialized
in repairing trucks said his scanner won't give a reading.  It reads fine on his Durango.  All
my fuses are good.  Any advice?

3 Answers


Sounds like the OBD port is not hooked up, or a wire from or to it broken. Even with no power from car, the batteries in the scanner will supply the power to read fault codes from ECU.

1 out of 1 people think this is helpful.

Thank you, I inspected the port and it appears that some of the wires have been jammed into it, however I found a 'cheat', I was able to turn the ignition switch off and on 3 times and the codes were revealed on the odometer. P0202 and P0037. Thanks again for your time.


Cool! Now at least you know what to deal with, if you don't already know this, just Google OBD (the codes) and there are a couple good sites that show cause and solution

3 out of 3 people think this is helpful.

Your Answer

Add photo

Related Questions

Ram 1500

Looking for a Used Ram 1500 in your area?

CarGurus has 13,739 nationwide Ram 1500 listings starting at $995.


Search Dodge Ram 1500 Questions

Dodge Ram 1500 Experts

#1 Dan Connell
Dan Connell
Reputation 5,280
#2 pudgybear
Reputation 5,000
#3 dandyoun
Reputation 4,670
View All

Related Models For Sale

Used Ford F-150"
3,267 Great Deals out of 216,697 listings starting at $1,500
Used Chevrolet Silverado 1500"
2,447 Great Deals out of 144,719 listings starting at $1,995
Used Dodge Ram 2500"
152 Great Deals out of 5,744 listings starting at $2,289
Used GMC Sierra 1500"
1,024 Great Deals out of 56,926 listings starting at $2,300
Used Toyota Tundra"
621 Great Deals out of 26,774 listings starting at $2,500
Used Toyota Tacoma"
617 Great Deals out of 30,502 listings starting at $2,850
Used Dodge Dakota"
161 Great Deals out of 4,800 listings starting at $900
Used Ford F-250 Super Duty"
444 Great Deals out of 43,001 listings starting at $2,250
Used Dodge Ram 3500"
105 Great Deals out of 2,511 listings starting at $4,995
Used Ford Mustang"
733 Great Deals out of 41,077 listings starting at $900
Used Jeep Wrangler"
461 Great Deals out of 16,417 listings starting at $3,400

Used Cars For Sale

2006 Dodge Ram 1500 SLT Quad Cab SB 4WD For Sale
18 Great Deals out of 375 listings starting at $5,900