Why does the ABS, Brake and Check Engine light all stay on and the Speedometer doesn't register till 25 mph.

Asked by lkitty May 22, 2013 at 01:16 PM about the Dodge RAM 1500

Question type: Maintenance & Repair

This is a 1999 Dodge Ram 1500 SLT, 5.9 engine. The ABS, Brake and Check Engine
light all stay on and the speedometer doesn't register till you get around 25mph and also
drops out when approaching a stop. All was fine until I shifted from 2 wheel to 4 wheel
and also fueled up. The check engine code was P0138, O2 sensor down stream. Any
suggestions?

5 Answers

Could be an unreliable ground...trace the black battery cable to where it attaches to the chassis/frame disconnect and wirebrush the lug and chassis clean and re-attach it...this action will reset the codes...with any luck~

1 people found this helpful.

hate to suggest this, just try a "global reset" if it fails pick up another ECM---your speedo troubles and dash complications should vanish...if the reset ain't doin' it~

1 people found this helpful.

After replacing the battery because of age, I am seeing this same condition. I will check ground wires and reset. Any other suggestions?

15

I have the same issue with my 1999 Ram 1500 5.2L. ABS & Brake light stay on but it's sporadic. Check engine light goes on and off from time to time. Both puzzled me for awhile. Codes were saying O2 sensors and Cat. But then the abs issue came up and the speedometer would stop working sometimes. Came across a few videos on YouTube that say it's a either a bad abs sensor on top of the differential or there's metal shavings in the gear oil causing it to not read properly. Changed the senor and drained the diff.

1 people found this helpful.

Your Answer:

RAM 1500

Looking for a Used RAM 1500 in your area?

CarGurus has 81 nationwide RAM 1500 listings starting at $4,000.

Postal Code:

CarGurus Experts

  • #1
    Dan Connell
    Reputation
    20,230
  • #2
    dandyoun
    Reputation
    15,280
  • #3
    Gene Arnett
    Reputation
    11,760
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used RAM 1500
528 Great Deals out of 15,394 listings starting at $5,000
Used Ford F-150
289 Great Deals out of 15,384 listings starting at $1,712
Used Chevrolet Silverado 1500
211 Great Deals out of 5,943 listings starting at $3,995
Used GMC Sierra 1500
127 Great Deals out of 6,857 listings starting at $3,975
Used Dodge RAM 2500
27 listings starting at $4,000
Used Toyota Tundra
50 Great Deals out of 1,126 listings starting at $5,999
Used Dodge Charger
43 Great Deals out of 606 listings starting at $4,888
Used Toyota Tacoma
55 Great Deals out of 1,032 listings starting at $8,708
Used Dodge Durango
51 Great Deals out of 2,276 listings starting at $5,500
Used Dodge Challenger
24 Great Deals out of 473 listings starting at $7,999
Used Jeep Grand Cherokee
113 Great Deals out of 3,274 listings starting at $4,995
Used Chevrolet Silverado 2500HD
12 Great Deals out of 1,160 listings starting at $8,999
Used RAM 2500
47 Great Deals out of 2,175 listings starting at $14,998
Used Jeep Wrangler
147 Great Deals out of 5,072 listings starting at $6,995
Used Ford F-250 Super Duty
29 Great Deals out of 1,154 listings starting at $8,995

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. Content will be removed if CarGurus becomes aware that it violates our policies.