Powertrain, generic

P0E58 DC/DC Converter Temperature Sensor C Circuit

Check engine lightOn

EmissionsRelevant

Drive cycleNot required

Limp modePossible

P0E58 stands for a general circuit fault of the third temperature sensor in a DC/DC converter, after sensors A (P0C38 ff.) and B (P0C3D ff.). Which part of the converter sensor C watches is up to the maker. At Ford it is the inductor of the variable voltage converter, the boost stage of its full hybrids, but Ford uses only the plausibility code P0E59 for it. No manufacturer documents P0E58 publicly. The code is meant for a fault the controller can detect without being able to classify it as too low, too high or implausible, for example an unstable reference or supply. CARB requires circuit monitoring of hybrid input components. Without this reading the controller protects the converter by limiting its power, which can cut electric assist.

Likely causes

Sensor connection or wiring damaged or corroded

Temperature sensor in the converter defective

Sensor reference or evaluation circuit in the converter faulty

Symptoms

Hybrid system warning
Reduced electric assist or power

Repair estimate

DifficultyShop_onlyWorkshop job

Parts and labour€100–2,500

Time0.5–5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

dcdc converter temp sensor cwiring harnessdcdc converter

References: law.cornell.edu, fordservicecontent.com.