Open circuit or high resistance in the control circuit wiring or connector; Short to voltage on the control circuit; Faulty coolant control valve B actuator or solenoid; Corroded or damaged electrical connector at the valve; Failed powertrain control module driver for the valve circuit; Poor ground connection for the valve or module

DTC codes / P0Dxx · Hybrid propulsion / P0D1E

P0D1EHybrid/EV Battery Pack Coolant Control Valve B Control Circuit High

P0D1E indicates that the powertrain control module has detected an abnormally high voltage on the control circuit for the hybrid or electric vehicle battery pack coolant control valve B. This valve regulates coolant flow through the high-voltage battery pack, and a high voltage on its control circuit typically points to an open circuit, a short to voltage, or a faulty valve actuator.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaHybrid propulsion

Symptoms you may notice

Illumination of the check engine light or service vehicle soon message
Often no symptoms besides the warning light
Reduced hybrid/EV system performance or power output
Battery pack overheating warning or reduced charging rate
Cooling fan running excessively or not at all
Possible entry into limp mode or limited electric-only operation

Common causes, most likely first

Open circuit or high resistance in the control circuit wiring or connector
Short to voltage on the control circuit
Faulty coolant control valve B actuator or solenoid
Corroded or damaged electrical connector at the valve
Failed powertrain control module driver for the valve circuit
Poor ground connection for the valve or module

How to diagnose and fix it

Connect a scan tool and verify P0D1E is current, then record freeze-frame data and check for related codes
Inspect the valve connector and harness for corrosion, chafing, or loose pins, and repair as needed
Measure resistance of the valve control circuit and compare to manufacturer specifications
Check for short to voltage on the control circuit with the key on and valve disconnected
Test the coolant control valve B actuator with a bidirectional scan tool or apply voltage directly to confirm operation
If the circuit and valve test good, check the powertrain control module driver and ground circuits
Replace the faulty coolant control valve B or repair the wiring, then clear codes and verify the repair

What a high voltage code really means

A high voltage on a control circuit often indicates an open circuit rather than a short, because the module pulls the line up when no load is present.
The coolant control valve may be mechanically stuck or clogged with debris, causing the actuator to draw abnormal current and set a circuit code.
Some vehicles use a shared power supply for multiple coolant valves, so a fault in one valve can affect the circuit of another.
A weak or failing 12-volt battery can cause erratic module behavior and set false circuit codes, so always check battery health first.
After repairs, the coolant system may need to be bled and the valve calibrated with a scan tool to prevent repeat codes.

Can I keep driving with P0D1E?

It is generally safe to drive short distances to a repair shop, but avoid heavy acceleration, prolonged driving, or high ambient temperatures because the battery pack may not cool properly. If the vehicle enters limp mode or shows a battery temperature warning, stop driving and seek service immediately.

Tools that help

Tools we recommend are in the Auto Veteran shop on Amazon. As an Amazon Associate we earn from qualifying purchases.

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