P1445
PowertrainPurge Flow Sensor Circuit High Input
P1445 is a manufacturer-specific code that varies by make. On Ford and Jaguar/Land Rover models particularly, it typically relates to a fault in the EVAP system, often the canister vent valve or vapour management system. Other makes interpret it differently. Always check the workshop manual for your specific vehicle.
ⓘ Information only. This page provides general educational information about fault code P1445. We do not assess the urgency or safety implications of any specific fault. That requires in-person diagnosis by a qualified mechanic. Full terms.
Recommended next steps
Whether a fault is urgent, drivable, or routine depends entirely on the cause on a specific vehicle, and that can only be determined by a qualified mechanic with diagnostic equipment. If a warning light is illuminated, the most reliable next step is professional diagnosis.
What does P1445 mean?
P1445 is a Powertrain (engine, transmission, fuel system) fault code. It indicates: Purge Flow Sensor Circuit High Input.
Symptoms commonly associated with this code
Symptoms that drivers often report alongside this code. Not all may apply to every case:
- • Engine warning light, usually the only obvious symptom
- • Sometimes a slight smell of petrol around the vehicle
- • Drivability typically unaffected
- • Hard starting after refuelling on cars with stuck-closed vent valves
- • On certain Jaguar/Land Rover models: poor running for the first minute after starting
Possible causes
Causes commonly associated with P1445, listed in approximate order of typical investigation. The actual cause on a specific vehicle can only be confirmed by professional diagnosis.
- 1. Failed canister vent valve (most common on the makes affected)
- 2. Cracked or split EVAP hose between the canister and the engine
- 3. Faulty fuel tank pressure sensor
- 4. Saturated charcoal canister, the canister has reached capacity and can't accept more vapour
- 5. Wiring fault to the vent valve or pressure sensor
- 6. On Land Rover and Jaguar diesel models: this code can also relate to fuel system issues, check your specific year's documentation
How mechanics typically diagnose
A typical diagnostic sequence used by mechanics, provided here for educational reference only. Diagnostic work should be performed by a qualified mechanic with the appropriate tools and training.
- 1. Identify the manufacturer-specific interpretation for your make and year
- 2. Inspect the EVAP system for visible damage: cracked hoses, loose clamps, missing fuel cap seal
- 3. Test the vent valve electrically and operationally; a hand vacuum pump (£20) helps verify it holds and releases vacuum correctly
- 4. Read live fuel tank pressure data with a scan tool
- 5. Workshop smoke test of the EVAP system (£30-£60) finds leaks reliably
- 6. Check the fuel cap seal for cracks; old or damaged caps are a cheap first try
Common questions about P1445
Why does the same code mean different things on different cars? +
Manufacturer-specific code ranges (P1xxx) are defined by individual carmakers rather than the SAE standard, so a P1445 on a Ford means something different from a P1445 on another make. Always check your specific make's documentation when chasing P1xxx codes; generic OBD readers can't always interpret these correctly.
Will my MOT pass? +
EVAP codes don't directly affect MOT emissions readings, but if engine warning light is on at the time of test, that's a possible reason for failure. What matters is whether the MIL is illuminated at the time of test. for cars from 2018 onwards. Fix the underlying fault first, drive a few cycles to clear the light, then book the test.
Is there a smell of petrol after refuelling? +
Common with EVAP faults. The system normally captures fuel vapour escaping from the tank and routes it to the engine for burning. With a fault, vapour escapes to atmosphere, often immediately after a fillup when tank pressure is highest. The smell usually fades within hours.
Manufacturer-specific notes
Some manufacturers publish additional definitions or variations for this code. Always cross-check with your vehicle's own service documentation.
Information only, not professional advice
The information on this page is provided for general guidance and educational purposes only. It is not a substitute for diagnosis or repair advice from a qualified mechanic. Always verify any fault before paying for repairs. carfaultcodes.co.uk accepts no liability for decisions made based on this information. Full terms →