# Service bulletin S2525000002 REV.B

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 11031236
- Published by NHTSA: 2026\-04\-10
- Manufacturer's number: S2525000002 REV.B
- Manufacturer's date: 2026\-03\-31
- NHTSA component: UNKNOWN OR OTHER

## NHTSA's summary

Diesel Exhaust Fluid \(DEF\) Gauge Fluctuates Or Is Erratic. Diagnostic Trouble Code \(DTC\) P203F – Reductant Level Too Low.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11031236-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11031236-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Trouble codes named

P203F

## Vehicles listed

- 2025 to 2026 RAM 2500
- 2025 to 2026 RAM 3500
- 2025 to 2026 RAM 4500
- 2025 to 2026 RAM 5500

JSON: [/v1/bulletins/11031236](/v1/bulletins/11031236)

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