2018 Ram 3500 · symptom sheet

Adaptive cruise or lane keeping misbehaves

90owner reports
34,000median miles
$843median quote
0involved a crash

Newest report Jun 12, 2026 · checked Sep 9, 2026

156 of the 797 complaints on this car are about speed control. 90 of those describe driver assist. Only brake wear is reported more often on this car.

Tick what matches of 90 reports

cruise control shut off on its own

it steered me toward the line

a sensor blocked warning in clear weather

it slowed for nothing

a software update did not fix it

What got replaced

Few of these reports name the part that was replaced.

Recalls and investigations

No recall on speed control covers the 2018 model year as of Sep 9, 2026.

What owners paid

14 of the 90 reports quote a price. Each dot is one quote. The middle half runs $300 to $1,400.

$300$843$1,400

$0k$2k$4k$6k$8k

When it happens

The middle half of failures fell between 15,000 and 50,000 miles, from the 34 reports that gave a mileage.

119

120

121

422

3623

3824

325

626

What owners wrote

“Intermittent loss of anti-lock braking system and cruise control. code C0020-01 ABS pump failure. First occurred at approx. 47,900 miles.”
Filed Oct 7, 2024 · 47,900 miles

“We receive a ABS/ECS, electronic brake control warning intermittently. This also makes the cruise control shutoff. We had the ABS control module replaced once at roughly 12000 miles under warranty but it now is giving the same warnings and the truck currently has 22000 miles on it. My dealer stated this was a known issue and stated itâs fairly common on my model truck”
Filed Jul 28, 2024 · 12,000 miles

“The warning light comes on and then the traction control goes off and the cruise control will disengage all at once. There is also no trailer brake assist. This has been verified by a dealer in Columbus, GA. It is constantly going off and on. The warning light and the warning bell are a constant distraction to the driver. The truck was bought and within 50K miles it started. No warning.”
Filed Apr 3, 2024 · 50,000 miles

“2018 Ram 3500, ABS, Traction Control lights came on 18,000 miles. Issue also renders Cruise Control inoperable.”
Filed Feb 1, 2024 · 18,000 miles

Should you keep driving it?

This page can't tell you that. 0 of 90 reports involved a crash. Owners who file are the ones who had a bad experience, and nobody checks their reports. If the problem affects steering, braking, power or a fire risk, treat it as a safety fault and have it inspected before a long or high-speed drive.

File your own report with NHTSA. Complaint counts are how a problem gets an investigation.