P2687 — Fuel Supply Heater Control Circuit/Open
P2687 — Fuel Supply Heater Control Circuit/Open. A fault in the sensor and actuator circuits. The car is usually drivable while you plan the repair. Typical causes: open or shorted wiring in the circuit, control module driver fault, faulty sensor or actuator of the affected circuit.
powertrain (engine/transmission)
Is it safe to drive?
Short-term driving is OK In most cases the car remains drivable, possibly with reduced performance or a disabled auxiliary system. If symptoms include stalling, no-start or brake/steering warnings, treat it as urgent.
How to diagnose with an OBD scanner
- Read the code and freeze frame Connect an OBD2 scanner, confirm P2687 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 fuel supply heater control circuit/open for damage, corrosion, chafing or poor contact.
- Subsystem check Measure reference voltage, ground and signal continuity at the component connector.
- Subsystem check Wiggle-test the harness while watching the signal in live data — dropouts reveal broken wires.
- Verify the repair Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P2687 does not return.
Approximate repair cost
Repair cost depends on which component actually failed. Typical scenarios for P2687 (parts and labor, USD, independent shop rates): Control module repair: $300–$1,000; Replace the faulty sensor or actuator: $150–$500; Repair wiring or connectors: $80–$250. Overall, fixing P2687 usually costs between $80 and $1,000. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.
Common questions
What are the symptoms of P2687?
Drivers most often notice: increased fuel consumption in some cases, possible limp mode depending on the affected component, Check Engine Light on, the affected system operates intermittently or not at all.
What is the most common cause of P2687?
The most common causes are: open or shorted wiring in the circuit, control module driver fault, faulty sensor or actuator of the affected circuit.
How do I diagnose P2687 myself?
Start with a scan: confirm P2687, save the freeze frame and note any companion codes. Then inspect the wiring and connectors related to the sensor and actuator circuits, and verify the suspect component against live data before buying parts.
Is it safe to drive with P2687?
In most cases the car remains drivable, possibly with reduced performance or a disabled auxiliary system. If symptoms include stalling, no-start or brake/steering warnings, treat it as urgent.
How much does it cost to fix P2687?
Control module repair — $300–$1,000; Replace the faulty sensor or actuator — $150–$500; Repair wiring or connectors — $80–$250. Exact cost depends on the root cause, your vehicle and local labor rates — a proper diagnosis is the cheapest first step.
What does P2687 mean?
P2687 is logged by the onboard diagnostics when the sensor and actuator circuits does not behave as expected. The official definition is “Fuel Supply Heater Control Circuit/Open”. This is a powertrain (engine/transmission) category code.
To set P2687, the control module compares live readings of the sensor and actuator circuits against calibrated limits, usually over several drive cycles. Alongside the code it stores a freeze frame — a snapshot of rpm, load, coolant temperature and vehicle speed at the moment of failure. Reading that snapshot first saves diagnostic time.
What causes P2687?
- blown fuse feeding the circuit
- poor ground connection
- open or shorted wiring in the circuit
- faulty sensor or actuator of the affected circuit
Common symptoms of P2687
- increased fuel consumption in some cases
- possible limp mode depending on the affected component
- Check Engine Light on
- the affected system operates intermittently or not at all
How to diagnose P2687
- Connect an OBD2 scanner, confirm P2687 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 fuel supply heater control circuit/open for damage, corrosion, chafing or poor contact.
- Measure reference voltage, ground and signal continuity at the component connector.
- Wiggle-test the harness while watching the signal in live data — dropouts reveal broken wires.
- Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P2687 does not return.
How to fix P2687
Start with the cheapest and most common causes before replacing expensive parts:
- Control module repair — $300–$1,000
- Replace the faulty sensor or actuator — $150–$500
- Repair wiring or connectors — $80–$250
How much does it cost to fix P2687?
Repair cost depends on which component actually failed. Typical scenarios for P2687 (parts and labor, USD, independent shop rates):
- Control module repair: $300–$1,000
- Replace the faulty sensor or actuator: $150–$500
- Repair wiring or connectors: $80–$250
Overall, fixing P2687 usually costs between $80 and $1,000. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.
Can you drive with P2687?
In most cases the car remains drivable, possibly with reduced performance or a disabled auxiliary system. If symptoms include stalling, no-start or brake/steering warnings, treat it as urgent.