2014 Peterbilt 388 Engine Problems
- Complaints
- 1about this part
- Share
- 6%of 17 total for the year
- Median mileage
- 390,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 1 complaints about the engine of the 2014 Peterbilt 388, 6% of the 17 complaints for this model year. Where a mileage was given, the median is 390,000 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“Problems with (after treatment)codes flashing, check engine, immediately went to stop engine immediately and truck shut off at 70mph. Fortunately not on incline or decline and was able to pull to safety. This happened on two separate occasions. Peterbilt nor cummins has not been able to diagnose the problem until the fuel pump completely failed and took out the engine. Manufacturer knows this is a design and engineering flaw and refuses to take responsibility for these older trucks that still have low miles but are out of warranty. …”
NHTSA complaint #11265786, filed 2019-10, 390,000 milesRelated service bulletins
- 11037541Sep 11, 2026"Kenworth: Dealers should check the chassis list and SIR weekly for VIN changes. 2 chassis added to the chassis list. Peterbilt: Dealers should check the chassis list and SIR…
- 11010926Nov 22, 2024Info Only Unnecessary starter replacements can result from customer complaints regarding engine starting issues. A new Starter Troubleshooting Guide has been created to provide a…
- 10056025Jun 27, 2014Peterbilt: the malfunction indicator lamp (mil) illuminates due to an engine control unit (ecu) software issue, rear nox sensor, operating correctly.
Engine: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2014 | 1 | 6% |
Other parts of the 2014 Peterbilt 388
12 complaintsWheels
8 complaintsBody and structure
2 complaintsElectrical system
1 complaintsEngine cooling
1 complaintsFuel system
1 complaintsOther or unknown
1 complaints
← All problems reported for the 2014 Peterbilt 388
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 28, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology