P267F — P2680 Coolant Degassing Valve Control Circuit High
P267F — P2680 Coolant Degassing Valve Control Circuit High. A fault in the engine cooling and temperature control. Short, gentle driving to a shop is usually possible. Typical causes: thermostat stuck open or closed, failed cooling fan or fan relay, water pump or radiator issues.
powertrain (engine/transmission)
Is it safe to drive?
Drive with caution Drive with caution and watch the temperature gauge. A thermostat stuck open mainly costs fuel; any sign of overheating means stop immediately — driving an overheating engine destroys head gaskets and worse.
How to diagnose with an OBD scanner
- Read the code and freeze frame Connect an OBD2 scanner, confirm P267F is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
- Check for companion codes and TSBs Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many P0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
- Inspect wiring and connectors Visually inspect the wiring harness and connectors related to the engine cooling and temperature control for damage, corrosion, chafing or poor contact.
- Subsystem check With the P2680 coolant degassing valve control disconnected, measure signal voltage at the harness connector: a high reading with the component unplugged indicates a short to power in the harness; if it drops to normal, the component itself is faulty.
- Subsystem check Watch coolant temperature in live data during warmup — it should climb smoothly to operating temperature.
- Subsystem check Check coolant level and feel upper/lower radiator hoses to verify thermostat operation.
- Verify the repair Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P267F does not return.
Approximate repair cost
Repair cost depends on which component actually failed. Typical scenarios for P267F (parts and labor, USD, independent shop rates): Cooling system repair (pump, fan, radiator): $300–$1,200; Replace the coolant temperature sensor: $100–$300; Replace the thermostat: $150–$400. Overall, fixing P267F usually costs between $100 and $1,200. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.
Common questions
What is the most common cause of P267F?
The most common causes are: thermostat stuck open or closed, failed cooling fan or fan relay, water pump or radiator issues.
Will P267F clear itself?
Sometimes P267F clears after a few drive cycles if the fault was intermittent — for example a loose connector or a tank of bad fuel. The underlying cause usually remains, so the code tends to return. Clear it once; if it comes back, diagnose rather than erase it repeatedly.
How much does it cost to fix P267F?
Cooling system repair (pump, fan, radiator) — $300–$1,200; Replace the coolant temperature sensor — $100–$300; Replace the thermostat — $150–$400. Exact cost depends on the root cause, your vehicle and local labor rates — a proper diagnosis is the cheapest first step.
What are the symptoms of P267F?
Drivers most often notice: overheating warnings in severe cases, cooling fans running constantly, temperature gauge reads low or never reaches normal, Check Engine Light on.
How do I diagnose P267F myself?
Start with a scan: confirm P267F, save the freeze frame and note any companion codes. Then inspect the wiring and connectors related to the P2680 coolant degassing valve control, and verify the suspect component against live data before buying parts.
What does P267F mean?
Behind P267F is a specific failure in the engine cooling and temperature control: P2680 coolant degassing valve control circuit high. The onboard computer stores it in the powertrain (engine/transmission) group after verifying the fault over repeated checks.
“Circuit high” means the control module sees a voltage on the P2680 coolant degassing valve control circuit that is above the expected range — typically close to battery voltage. Physically this points to a short to a power feed, a broken ground return, or a failed component pulling the signal line high.
The module monitors this system continuously while driving. When readings fall outside the expected range for a defined number of drive cycles, it stores P267F and switches on the warning light. Freeze frame data saved with the code shows the exact conditions — rpm, load, temperature, speed — at the moment the fault was detected, which is the best starting point for diagnosis.
What causes P267F?
- signal wire shorted to battery positive
- open ground return of the P2680 coolant degassing valve control
- failed P2680 coolant degassing valve control pulling the signal high
- wiring faults in the sensor circuit
- thermostat stuck open or closed
- failed cooling fan or fan relay
- low coolant level or air in the system
Common symptoms of P267F
- overheating warnings in severe cases
- cooling fans running constantly
- temperature gauge reads low or never reaches normal
- Check Engine Light on
- poor cabin heat
How to diagnose P267F
- Connect an OBD2 scanner, confirm P267F is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
- Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many P0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
- Visually inspect the wiring harness and connectors related to the engine cooling and temperature control for damage, corrosion, chafing or poor contact.
- With the P2680 coolant degassing valve control disconnected, measure signal voltage at the harness connector: a high reading with the component unplugged indicates a short to power in the harness; if it drops to normal, the component itself is faulty.
- Watch coolant temperature in live data during warmup — it should climb smoothly to operating temperature.
- Check coolant level and feel upper/lower radiator hoses to verify thermostat operation.
- Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P267F does not return.
How to fix P267F
Start with the cheapest and most common causes before replacing expensive parts:
- Cooling system repair (pump, fan, radiator) — $300–$1,200
- Replace the coolant temperature sensor — $100–$300
- Replace the thermostat — $150–$400
How much does it cost to fix P267F?
Repair cost depends on which component actually failed. Typical scenarios for P267F (parts and labor, USD, independent shop rates):
- Cooling system repair (pump, fan, radiator): $300–$1,200
- Replace the coolant temperature sensor: $100–$300
- Replace the thermostat: $150–$400
Overall, fixing P267F usually costs between $100 and $1,200. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.
Can you drive with P267F?
Drive with caution and watch the temperature gauge. A thermostat stuck open mainly costs fuel; any sign of overheating means stop immediately — driving an overheating engine destroys head gaskets and worse.