P2CAC DC/DC Converter Temperature Sensor F Circuit Range/Performance

P2CAC flags DC/DC converter temperature sensor F as implausible although its signal is electrically valid. With six sensors in one converter the controller has plenty of reference values: after a cold soak all should read close to ambient, and during operation sensor F should rise and fall in step with the load on the part it watches. The Hyundai patent shows that converter software already evaluates temperature differences between sensors, there to tune the switching frequency. No manufacturer documents P2CAC publicly; FCA's Ram 1500 eTorque bulletin 08-037-21 only covers performance codes up to sensor D. CARB requires rationality checks for hybrid component temperature sensors. A sensor detached from its heat sink, drift or outdated software are typical. Sensor E uses P2CA8.

Likely causes

Symptoms

• MIL on, sometimes after a single drive
• Sensor F reading out of line with the other converter temperatures

Repair estimate

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

Parts involved

Related codes

References: law.cornell.edu, patents.google.com, static.nhtsa.gov.