P017F

What it means

P017F is the generic code for a restricted air filter in the EVAP system leak detection pump module. During the leak test the control unit pumps air through the module's filter, and it saw a pressure or flow response that suggested the filter or fresh air path was blocked. The exact test method and the filter's position vary by make, model and engine.

Symptoms

• Engine management light on
• Fuel filler cap or EVAP-related warning on some vehicles
• Fuel smell around the vehicle in some cases
• Failed emissions or readiness test with EVAP monitor not completing
• Difficulty refuelling, such as the pump clicking off early, on some models
• No noticeable change in driving in most cases

Possible causes

• Leak detection pump module air filter blocked with dust, dirt or debrislikely
• Fresh air inlet pipe or hose pinched, blocked or contaminated, for example by insects, mud or waterlikely
• Water or fuel contamination of the filter or module after flooding or overfilling the tankpossible
• Faulty leak detection pump or internal valve in the module giving a false restriction readingpossible
• Damaged wiring or connector to the module, or poor electrical supply or earthpossible
• Blocked or restricted charcoal canister or vent path, depending on system layoutrare
• Control unit fault or outdated software where the manufacturer has issued a known updaterare

How to diagnose

1. Read the stored codes and freeze frame data, noting any other EVAP codes and the conditions when the fault set.
2. Check for service bulletins or known faults for this model and engine, as filter location and test method differ.
3. Visually inspect the module, its air filter, the fresh air inlet pipe and hoses for blockage, kinks, damage, dirt, water or insects.
4. Inspect the wiring and connectors to the module for corrosion, damage or loose pins, and check the supply and earth.
5. Check whether the fuel tank has been overfilled and whether fuel or liquid has reached the canister or module.
6. Use a bidirectional scan function, where supported, to operate the pump and valves and watch the pressure or flow response against specification.
7. Remove and inspect the filter and check airflow through the fresh air path, following the manufacturer's procedure.
8. Clear the code after repair and run the EVAP monitor drive cycle to confirm it does not return.

How to fix

• Clean or replace the leak detection module air filter where it is serviceable.
• Clear, straighten or replace blocked or damaged fresh air hoses and pipes.
• Repair damaged wiring or connectors and correct any supply or earth fault.
• Replace the leak detection pump module if testing shows it is faulty.
• Replace a contaminated canister or fuel vapour components if liquid or fuel has got in, and advise against overfilling the tank.
• Update the control unit software only where the manufacturer lists it as a fix for this fault.

Can I keep driving?

Nearby codes

• P017EGenericCylinder Head Temperature Sensor A Circuit Intermittent/Erratic
• P0180GenericFuel Temperature Sensor A Circuit