P2407 — Evaporative Emission System Leak Detection Pump Sense Circuit Intermittent/Erratic

P2407 — Evaporative Emission System Leak Detection Pump Sense Circuit Intermittent/Erratic. A fault in the evaporative emission (EVAP) system. The car is usually drivable while you plan the repair. Typical causes: cracked EVAP hoses or lines, saturated or damaged charcoal canister, loose, damaged or wrong fuel cap.

powertrain (engine/transmission)

Is it safe to drive?

Short-term driving is OK Safe to drive. EVAP faults affect emissions, not drivability — you can keep using the car while planning the repair. Fuel vapour smell is a reason to fix it sooner: vapours are flammable and harmful.

How to diagnose with an OBD scanner

  1. Read the code and freeze frame Connect an OBD2 scanner, confirm P2407 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
  2. 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.
  3. Inspect wiring and connectors Visually inspect the wiring harness and connectors related to the evaporative emission (EVAP) system for damage, corrosion, chafing or poor contact.
  4. Subsystem check Check the fuel cap first — it is the most common cause; inspect the seal and tighten until it clicks.
  5. Subsystem check Run an EVAP leak test (smoke test) to locate small leaks in hoses, canister and valves.
  6. Verify the repair Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P2407 does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for P2407 (parts and labor, USD, independent shop rates): Replace the purge or vent valve: $120–$350; Replace the fuel cap: $20–$60; Replace the charcoal canister: $250–$700. Overall, fixing P2407 usually costs between $20 and $700. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Common questions

Will P2407 clear itself?

Sometimes P2407 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.

Is it safe to drive with P2407?

Safe to drive. EVAP faults affect emissions, not drivability — you can keep using the car while planning the repair. Fuel vapour smell is a reason to fix it sooner: vapours are flammable and harmful.

How much does it cost to fix P2407?

Replace the purge or vent valve — $120–$350; Replace the fuel cap — $20–$60; Replace the charcoal canister — $250–$700. Exact cost depends on the root cause, your vehicle and local labor rates — a proper diagnosis is the cheapest first step.

What is the most common cause of P2407?

The most common causes are: cracked EVAP hoses or lines, saturated or damaged charcoal canister, loose, damaged or wrong fuel cap.

What does OBD2 code P2407 mean?

P2407 — Evaporative Emission System Leak Detection Pump Sense Circuit Intermittent/Erratic. A fault in the evaporative emission (EVAP) system. The car is usually drivable while you plan the repair. Typical causes: cracked EVAP hoses or lines, saturated or damaged charcoal canister, loose, damaged or wrong fuel cap.

What does P2407 mean?

P2407 is logged by the onboard diagnostics when the evaporative emission (EVAP) system does not behave as expected. The official definition is “Evaporative Emission System Leak Detection Pump Sense Circuit Intermittent/Erratic”. This is a powertrain (engine/transmission) category code.

This code does not appear from a single bad reading: the module must see the fault condition repeat under defined operating conditions before it turns on the warning light. The freeze frame captured with P2407 — engine load, rpm, temperature, speed — tells you exactly when the problem occurs, so reproduce those conditions when testing.

Common symptoms of P2407

  • no noticeable driving symptoms in most cases
  • difficulty refueling (nozzle clicks off)
  • slightly worse fuel economy
  • fuel smell near the car, especially after refueling
  • Check Engine Light on

What causes P2407?

  • loose, damaged or wrong fuel cap
  • cracked EVAP hoses or lines
  • saturated or damaged charcoal canister
  • faulty vent valve or leak detection pump
  • small leak in the fuel tank or filler neck
  • faulty purge valve (canister purge solenoid)

How to diagnose P2407

  1. Connect an OBD2 scanner, confirm P2407 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
  2. 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.
  3. Visually inspect the wiring harness and connectors related to the evaporative emission (EVAP) system for damage, corrosion, chafing or poor contact.
  4. Check the fuel cap first — it is the most common cause; inspect the seal and tighten until it clicks.
  5. Run an EVAP leak test (smoke test) to locate small leaks in hoses, canister and valves.
  6. Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P2407 does not return.

How to fix P2407

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

  • Replace the purge or vent valve — $120–$350
  • Replace the fuel cap — $20–$60
  • Replace the charcoal canister — $250–$700

How much does it cost to fix P2407?

Repair cost depends on which component actually failed. Typical scenarios for P2407 (parts and labor, USD, independent shop rates):

  • Replace the purge or vent valve: $120–$350
  • Replace the fuel cap: $20–$60
  • Replace the charcoal canister: $250–$700

Overall, fixing P2407 usually costs between $20 and $700. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Can you drive with P2407?

Safe to drive. EVAP faults affect emissions, not drivability — you can keep using the car while planning the repair. Fuel vapour smell is a reason to fix it sooner: vapours are flammable and harmful.

Related OBD2 codes