P2681 OBD-II: Engine Coolant Bypass Valve Control Circuit/Open

P2681 Severity

Urgent

Should you fix P2681 yourself?

Identifying an OBD code is just the start of a complete diagnostic routine. Most trouble codes are caused by a sensor reporting a value that is out of range. Just replacing a sensor may not fix underlying issues. Be sure to understand the code, the part or system in your car that the code refers to, and the risks of delaying professional repair.

Proper diagnosis will save you time and money on unnecessary repairs.

Urgent codes indicate immediate action is necessary. These are urgent and significant malfunctions that can cause severe damage to the vehicle or harm the driver and passengers.

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P2681 Summary Find a Repair Shop P2681 Details Ask RepairPal CarGenius Other OBD-II Codes

What causes OBD-II fault code P2681?

The Engine Coolant Bypass Valve (also referred to as the Passenger Compartment Heater Coolant Control Valve) sends coolant through the heater core when the heat in the cabin is on. The Hybrid Powertrain Control Module operates this valve based on coolant temperature and the driver's climate control request. If this Valve fails to function as requested, code P2681 is set.

OBD II Fault Code

OBD II P2681

OBD-II Code Vehicle may not have heat is defined as a Engine Coolant Bypass Valve Control Circuit/Open

Vehicle may not have heat Symptoms

Vehicle may not have heat

Common Problems That Trigger the P2681 Code

High voltage powertrain control module failure
Passenger compartment heater coolant control valve failure
Wiring issue

OBD Code Resources

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OBD II Fault Code

OBD II P2681

OBD-II Code Vehicle may not have heat is defined as a Engine Coolant Bypass Valve Control Circuit/Open

Vehicle may not have heat Symptoms

Vehicle may not have heat

Common Problems That Trigger the P2681 Code

High voltage powertrain control module failure
Passenger compartment heater coolant control valve failure
Wiring issue

P2681 OBD-II: Engine Coolant Bypass Valve Control Circuit/Open

Should you fix P2681 yourself?

What causes OBD-II fault code P2681?

Need a P2681 diagnosis? Trust our experts.

OBD II Fault Code

Vehicle may not have heat Symptoms

Common Problems That Trigger the P2681 Code

OBD Code Resources

Ask our experts about P2681.

Other OBD-II Codes

OBD II Fault Code

Vehicle may not have heat Symptoms

Common Problems That Trigger the P2681 Code