P238EWater in Fuel Sensor B Circuit Intermittent
- Generic OBD-II code · Powertrain
- How the car detects it
- P238E is meant for a water-in-fuel sensor B circuit whose signal flickers or drops out for short periods instead of staying at one fault level. No manufacturer documents P238E publicly. The one published case for the same sensor explains well why such faults come and go: on 2022 Ram heavy-duty trucks Stellantis found water from road spray or pressure washing inside the plug of the frame-mounted filter, logged there as P238D. Moisture that evaporates, terminals that lose contact on rough roads and fuel sloshing over the probe can all produce brief changes. Since the sensor is a plain pair of electrodes, connector, pins and harness clips along the frame rail come first. P238C and P238D are the steady low and high faults.
- What you may notice
- Water-in-fuel lamp flickering or coming and going
- Fault not present when tested at the workshop
- Likely causes
- LikelyMoisture entering and drying out in the connector
- PossibleLoose terminals losing contact on rough roads
- RareBroken harness clips letting the wire rub on the frame
- Repair
- Easy · Often possible to do yourself.Typical cost: €0 – €250
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.