P23E0
Cylinder 4 Fuel Heater Performance
Cylinder 4 fuel heater is electrically intact yet does not deliver the expected heat - aged element or contact resistance high.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Heater element agedCommon
Parts involved
- Fuel Heater Cyl 4
P23E0 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.