A shorted or partially shorted bypass valve actuator solenoid winding, which draws excessive current and overheats; Chafed, pinched or internally shorted wiring in the bypass valve driver circuit, often near hot exhaust or turbo components; Corroded or loose electrical connector pins at the bypass valve or PCM, raising resistance and heat at the terminal; A failed or sticking bypass valve mechanism that forces the actuator to work harder and draw more current; A faulty PCM driver output stage that can no longer regulate current to the bypass valve; Aftermarket or incorrect bypass valve components with wrong resistance or current draw; Heat soak or debris blocking the bypass valve actuator, causing it to overheat during normal operation

DTC codes / P2Cxx · Hybrid propulsion / P2C2F

P2C2FTurbocharger/Supercharger Bypass Valve B Driver Current/Temperature Too High

P2C2F means the powertrain control module (PCM) has detected that the driver circuit for the turbocharger or supercharger bypass valve 'B' is reporting excessive current or an excessively high temperature. The computer monitors the electrical load and thermal condition of that output circuit, and when either exceeds the calibrated limit it stores this code and usually commands the bypass valve to a safe default position.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaHybrid propulsion

Symptoms you may notice

Illumination of the check engine light, often with no other noticeable symptoms besides the warning light
Reduced engine power or a limp-home mode as the PCM limits boost to protect the bypass valve circuit
Poor acceleration or sluggish throttle response because the bypass valve cannot be commanded normally
Rough idle or stalling after throttle release if the bypass valve sticks partially open
In rare cases, a burning smell or visible heat damage near the bypass valve actuator or wiring

Common causes, most likely first

A shorted or partially shorted bypass valve actuator solenoid winding, which draws excessive current and overheats
Chafed, pinched or internally shorted wiring in the bypass valve driver circuit, often near hot exhaust or turbo components
Corroded or loose electrical connector pins at the bypass valve or PCM, raising resistance and heat at the terminal
A failed or sticking bypass valve mechanism that forces the actuator to work harder and draw more current
A faulty PCM driver output stage that can no longer regulate current to the bypass valve
Aftermarket or incorrect bypass valve components with wrong resistance or current draw
Heat soak or debris blocking the bypass valve actuator, causing it to overheat during normal operation

How to diagnose and fix it

Scan all modules and record freeze-frame data for P2C2F, then clear the code and verify whether it returns immediately or only after a drive cycle
Inspect the bypass valve actuator and its connector for corrosion, loose pins, melted plastic or signs of overheating
Measure the resistance of the bypass valve actuator solenoid with a multimeter and compare it to the manufacturer's specification
Perform a voltage drop test on both the power and ground sides of the bypass valve driver circuit while commanding the valve with a scan tool
Check the wiring harness for chafing, pinches or short-to-ground conditions along the route from the PCM to the bypass valve
If electrical checks pass, remove and inspect the bypass valve for mechanical binding or carbon buildup, and test it with a known-good actuator
Only after all circuit and component tests pass, consider PCM driver diagnosis or replacement following the manufacturer's diagnostic flow chart

What the bypass valve driver circuit hides

A partially shorted actuator winding can pass a simple resistance check at room temperature but fail and draw excessive current once the engine bay heat soaks the valve after a drive.
Technicians often replace the bypass valve only to find the real fault is a chafed harness section routed too close to the turbocharger or exhaust manifold, where heat damage is hidden under looming.
This code can set intermittently from a poor ground connection at the bypass valve or engine block, which raises circuit resistance and causes the driver to overheat without any hard failure.
A sticking bypass valve mechanism that is not electrically faulty can still trigger P2C2F because the actuator draws higher current trying to move against mechanical binding.
Do not assume the PCM is bad until every wire, connector and actuator test has been completed, because PCM driver failures are far less common than harness and valve faults.

Can I keep driving with P2C2F?

You can usually drive the vehicle to a repair shop, but avoid heavy throttle and sustained boost because the bypass valve may be stuck and the circuit is already overheating. If the engine enters limp mode or you smell burning, stop driving and have the vehicle towed to prevent further damage.

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.