A short to voltage on the battery disable circuit wiring, often from chafed insulation or a pinched harness; A failed battery disable switch or service disconnect plug that remains in the open or high state; Corrosion or water intrusion in the disable circuit connector causing a high-resistance or voltage-fed condition; A faulty hybrid/EV battery control module or interface module that misreads the disable line; A stuck-open relay or contactor in the battery disable path that feeds voltage back to the sense circuit; Poor ground connection for the disable circuit, causing a false high reference; Aftermarket alarm or remote-start wiring improperly tied into the disable circuit

DTC codes / P2Cxx · Hybrid propulsion / P2C98

P2C98Hybrid/EV Battery Disable Circuit High

Q: What does code P2C98 mean?

Hybrid/EV Battery Disable Circuit High. P2C98 indicates that the hybrid or electric vehicle's battery disable circuit is reporting a high voltage condition, meaning the control module sees the disable line stuck at or above the expected supply voltage when it should be low or pulsing. The computer detects this by comparing the disable circuit's voltage to its commanded state and flags the circuit as high when the signal remains outside the normal window.

P2C98 indicates that the hybrid or electric vehicle's battery disable circuit is reporting a high voltage condition, meaning the control module sees the disable line stuck at or above the expected supply voltage when it should be low or pulsing. The computer detects this by comparing the disable circuit's voltage to its commanded state and flags the circuit as high when the signal remains outside the normal window.

SystemPowertrain

Code typeGeneric (all makes)

SeverityHigh

Fix difficultyProfessional

AreaHybrid propulsion

Symptoms you may notice

Illumination of the hybrid system warning light or service vehicle soon message
The vehicle may refuse to start or enter Ready mode, leaving the high-voltage system disabled
Reduced power or a forced limp-home mode if the vehicle does start
No noticeable drivability change in some cases, with only the warning light as evidence
Possible inability to shift out of Park or engage the electric drive
Intermittent warning light that appears after the vehicle sits or during damp weather

Common causes, most likely first

A short to voltage on the battery disable circuit wiring, often from chafed insulation or a pinched harness
A failed battery disable switch or service disconnect plug that remains in the open or high state
Corrosion or water intrusion in the disable circuit connector causing a high-resistance or voltage-fed condition
A faulty hybrid/EV battery control module or interface module that misreads the disable line
A stuck-open relay or contactor in the battery disable path that feeds voltage back to the sense circuit
Poor ground connection for the disable circuit, causing a false high reference
Aftermarket alarm or remote-start wiring improperly tied into the disable circuit

How to diagnose and fix it

Scan all modules for related codes and record freeze-frame data to see when the high condition was set
Inspect the battery disable switch, service disconnect plug, and associated connectors for corrosion, water, or loose pins
Disconnect the battery control module and measure voltage on the disable circuit with a digital multimeter to check for a short to voltage
Perform a wiggle test on the harness while monitoring the disable circuit voltage to reveal intermittent shorts
Check the disable circuit ground and the module's power and ground feeds for voltage drops
If wiring and switches test good, substitute a known-good battery control module or disable relay to confirm the fault
Clear codes and verify the disable circuit voltage returns to the normal low or pulsed state during a road test

What a high disable circuit really means

A high disable circuit code often appears after battery service or disconnect work, when a connector is not fully seated or a service plug is left partially engaged.
Technicians sometimes replace the battery control module when the actual fault is a chafed harness behind the rear seat or near the service disconnect, so always inspect wiring first.
The disable circuit is a safety interlock, and the module may set this code if it sees voltage on the line from a backfeed through a failed relay rather than a direct short.
In some vehicles, a weak 12-volt auxiliary battery can cause the module to misread the disable line, so check system voltage before condemning hybrid components.
This code does not always mean the high-voltage battery is faulty; it specifically points to the disable signal circuit, which is a low-voltage control path.

Can I keep driving with P2C98?

Do not continue driving with this code because the high-voltage system may be disabled or behave unpredictably, and the vehicle could lose power or refuse to restart. Have the vehicle inspected by a qualified hybrid technician before attempting further trips.

Tools that help

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Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.