Powertrain, generic

P0EA6 DC/DC Converter B Over Temperature

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

P0EA6 means the second DC/DC converter, B, has reached a temperature beyond its permitted limit. Unlike a temperature sensor code, the reading itself is accepted as true; the unit is simply too hot and will normally reduce or stop its output to protect itself. FCA lists it as DC/DC Converter 2 Over Temperature for the 2019 Cherokee (KL) with the 3.2 V6 and stop-start (sales code EHK), in its PCM reflash bulletins (18-077-22, earlier 18-023-19 REV. B), which apply to MIL complaints with a list of start-stop related codes; no threshold is published. Under CARB the function of such parts has to be supervised. Blocked cooling air, high load on the 12 V network or a weak internal power stage are typical causes. Converter A uses P0D32 for the same fault.

Likely causes

Cooling air or heat sink of converter B obstructed
Sustained high load on the 12 V network
Control software misjudging the temperature condition
Weak internal power stage of converter B

Symptoms

  • MIL on
  • Start-stop unavailable while the converter is hot
  • Electrical consumers affected during engine restart

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–1,200
Time0.3–3 h

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

Parts involved

dcdc converter bengine control module

Related codes

P0D32P0EA5P0A94P0D33

References: static.nhtsa.gov, static.nhtsa.gov, law.cornell.edu.