P3487 — Cylinder 11 Exhaust Valve Control Circuit Low

For Ford vehicles

cylinder 11 exhaust valve control circuit – signal too low

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 P3487 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 cylinder 11 exhaust valve control for damage, corrosion, chafing or poor contact.
Subsystem check Check for supply voltage at the cylinder 11 exhaust valve control connector first; then measure resistance from the signal wire to ground — near-zero ohms confirms a short to ground in the harness.
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 P3487 does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for P3487 (parts and labor, USD, independent shop rates): Control module repair: $300–$1,000; Repair wiring or connectors: $80–$250; Replace the faulty sensor or actuator: $150–$500. Overall, fixing P3487 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

Is it safe to drive with P3487?

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.

What does OBD2 code P3487 mean?

Cylinder 11 Exhaust Valve Control Circuit Low (P3487): a powertrain (engine/transmission) fault affecting the sensor and actuator circuits. The car is usually drivable while you plan the repair. Most often caused by open or shorted wiring in the circuit, poor ground connection, blown fuse feeding the circuit.

Will P3487 clear itself?

Sometimes P3487 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 do I diagnose P3487 myself?

Start with a scan: confirm P3487, save the freeze frame and note any companion codes. Then inspect the wiring and connectors related to the cylinder 11 exhaust valve control, and verify the suspect component against live data before buying parts.

What is the most common cause of P3487?

The most common causes are: open or shorted wiring in the circuit, poor ground connection, blown fuse feeding the circuit.

What does P3487 mean?

Seeing P3487 on your scanner? The control unit has caught the sensor and actuator circuits operating outside its calibrated window. The formal description is “Cylinder 11 Exhaust Valve Control Circuit Low”, and the code is grouped under powertrain (engine/transmission) faults.

P3487 refers specifically to cylinder 11. On inline engines cylinders are counted from the front (belt end); on V-engines the numbering depends on the manufacturer, so check the firing-order diagram for your exact model. Location matters for the repair bill: some cylinders require intake manifold removal, which adds labor time.

“Circuit low” means the voltage on the cylinder 11 exhaust valve control circuit stays below the expected minimum — close to ground. The usual physical reasons are a short to ground, a chafed wire touching metal, a missing supply voltage, or a failed component dragging the signal down.

To set P3487, 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 P3487?

signal wire shorted to ground (chafed insulation)
failed cylinder 11 exhaust valve control pulling the signal low
missing supply voltage to the cylinder 11 exhaust valve control
faulty sensor or actuator of the affected circuit
corroded, loose or damaged connector
control module driver fault
blown fuse feeding the circuit

Common symptoms of P3487

the affected system operates intermittently or not at all
possible limp mode depending on the affected component
increased fuel consumption in some cases
Check Engine Light on

How to diagnose P3487

Connect an OBD2 scanner, confirm P3487 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 cylinder 11 exhaust valve control for damage, corrosion, chafing or poor contact.
Check for supply voltage at the cylinder 11 exhaust valve control connector first; then measure resistance from the signal wire to ground — near-zero ohms confirms a short to ground in the harness.
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 P3487 does not return.

How to fix P3487

Start with the cheapest and most common causes before replacing expensive parts:

Control module repair — $300–$1,000
Repair wiring or connectors — $80–$250
Replace the faulty sensor or actuator — $150–$500

How much does it cost to fix P3487?

Repair cost depends on which component actually failed. Typical scenarios for P3487 (parts and labor, USD, independent shop rates):

Control module repair: $300–$1,000
Repair wiring or connectors: $80–$250
Replace the faulty sensor or actuator: $150–$500

Overall, fixing P3487 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 P3487?