Powertrain, generic (extended)

P2C98 Hybrid/EV Battery Disable Circuit High

Check engine lightOn
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

P2C98 flags a battery disable line whose level is above the permitted range, usually through a short to 12 V or a sender that drives the line too high. Unlike the low case, the risk here can be hidden: if a high level means all clear, a stuck-high line would no longer pass on a real shutdown request. That is the point of such a wire in Volkswagen patent US9586481B2, which lets a crash signal open the contactor within 10–100 ms, and in Coda patent US20110304202A1, which disconnects the battery once airbag deployment is decided. The controller therefore flags the line even while driving seems normal; the CAN path normally remains as a backup. No manufacturer documents P2C98 publicly. CARB requires monitoring of hybrid components. Inspect the line for contact with feed wires.

Likely causes

Disable line shorted to 12 V supply
Sending module driving the line above the valid level
Input stage in the battery controller misreading the level

Symptoms

  • High-voltage system warning, often without noticeable driving fault
  • Ready mode may be blocked after the next restart, depending on maker

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€50–2,000
Time0.5–5 h

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

Parts involved

hybrid battery disable switchwiring harnessbms

Related codes

P2C96P2C97P0A0AP0AA1

References: patents.google.com, patents.google.com, law.cornell.edu.