Reference meaning
What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
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A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Scan worksheet →Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
P1450:00UNABLE TO BLEED UP FUEL TANK VACUUMTHIS CONCERN MAY BE CAUSED BY THE PURGE VALVE, WHICH HAS BEEN MODIFIED TO ELIMINATE THIS CONCERN
P1450unable to bleed up fuel tank vacuum
Manufacturer communications
20Original wording in English
LEXUS
TSB: Some 2023 model year RX 500h vehicles may exhibit a MIL ON condition with Diagnostic Trouble Code (DTC) P24517F ? Evaporative Emission System Switching Valve Actuator Stuck Off present. This DTC may erroneously be displayed when the fault is related to DTC P14502A ? Fuel Tank Pressure Sensor Signal Stuck in Range. The Engin…
TOYOTA
TSB: Some 2020 ? 2023 model year Highlander Hybrid and 2021 ? 2023 model year RAV4 Hybrid, RAV4 Prime, Sienna Hybrid, and Venza Hybrid vehicles may exhibit a MIL ON condition with one or both of the following Diagnostic Trouble Codes (DTCs) present: ?P24517F ? Evaporative Emission System Switching Valve Actuator Stuck Off. ?P145…
FORD
Some 2017-2021 Transit vehicles built on or before 30-Nov-2020 may experience a slow fill condition and/or illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTCs) P0171, P0174, P0451, P0455, P0456, P0496 and/or P1450. This may be due to a kinked evaporator emissions fresh air vent line. To correct this …
FORD, LINCOLN
Some 20132017 C-MAX Energi, 20172018 C-MAX Hybrid, 20132020 Fusion Energi and 2017-2020 Fusion/MKZ Hybrid vehicles may exhibit an illuminated malfunction indicator lamp (MIL) with any of the following diagnostic trouble codes (DTCs): P0496, P1450, P04ED, P04EF, P04EE, P2450, P2451. When performing pinpoint test (PPT) HX in the P…
Check vehicle applicability
93A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Ford | C-MAX ↗ | 2017 |
| Ford | C-MAX ↗ | 2016 |
| Ford | C-MAX ↗ | 2015 |
| Ford | C-MAX ↗ | 2014 |
| Ford | C-MAX ↗ | 2013 |
| Ford | C-MAX ENERGI ↗ | 2017 |
| Ford | C-MAX ENERGI ↗ | 2016 |
| Ford | C-MAX ENERGI ↗ | 2015 |
Code meaning and manufacturer information
Original wording in English · Historical directory labels; manufacturer applicability has not been established for every entry.
Unable To Bleed Up Fuel Tank Vacuum
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.