Rough Idle or Engine Misfire

Expert diagnosis and repair solutions for 2012 Ram 1500 Rough Idle or Engine Misfire. Get step-by-step fixes, cost estimates, and professional advice.

Expert Repair Solutions

medium$150-$300

Replace faulty ignition coils to resolve misfire issues. This is a common fix for rough idle and misfire problems in the 2012 Ram 1500.

Source: https://repairpal.com/ram/1500/2012/rough-idle

Repair Steps:

Identify the misfiring cylinder using an OBD-II scanner
Remove the ignition coil from the affected cylinder
Install a new ignition coil and test for improvement

medium$100-$250

Clean or replace dirty fuel injectors to improve engine performance and resolve rough idle.

Source: https://www.justanswer.com/dodge/ni9d7-i-ve-2012-ram-1500-hemi-135k-experienced-rough.html

Repair Steps:

Use a fuel injector cleaning kit to clean the injectors
If cleaning does not resolve the issue, replace the faulty injectors
Test drive the vehicle to ensure the problem is resolved

easy$50-$150

Inspect and repair vacuum leaks in the engine to address rough idle issues.

Source: https://repairpal.com/ram/1500/2012/rough-idle

Repair Steps:

Perform a visual inspection of vacuum hoses for cracks or disconnections
Use a smoke machine to detect leaks in hard-to-see areas
Repair or replace damaged vacuum hoses

easyFree under warranty

Update PCM software to address misfire issues related to engine warm-up.

Source: https://static.nhtsa.gov/odi/tsbs/2025/MC-11013168-0001.pdf

Repair Steps:

Visit a dealership to have the PCM software updated
Ensure the latest software version is installed
Verify that the update resolves the rough idle issue

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