Details On DTCs

WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.

DTC P0455:00 OR P0456:00 (PCM, SKYACTIV-G) DETECTION CONDITION AND POSSIBLE CAUSE

Description	P0455:00 Evaporative gas leakage (leakage amount: large) P0456:00 Evaporative gas leakage (leakage amount: extremely low)
Detection condition	Determination conditions	P0455:00 Hole of 0.09 in (2.25 mm) or more in evaporative gas passage
	Determination conditions	P0456:00 Hole of 0.02 in (0.5 mm) or more in evaporative gas passage
	Preconditions	P0455:00 Evaporative gas flow amount: Exceeds 10, 000 cm³ /min or fuel tank vacuum is high Fuel tank pressure: -4, 340.2-4, 030.1 Pa {-442.57-410.95 kgf/m² , -0.62949-0.58452 psi}¹ IAT sensor No. 1: 4.44-43.33°C {40.0-109.9°F}^1 Vehicle speed: 64-145 km/h {40.0-90.0 mph}^1 Barometric pressure: 72.23 kPa {0.7365 kgf/cm² , 10.48 psi} or more¹ Period ignition is switched off before engine starts: 210 min or more Fuel level in fuel tank: 15-85 %¹ Minimum value of intake manifold vacuum: 4 kPa {0.04 kgf/cm² , 0.6 psi} or more Minimum value of intake air amount: more than 2 g/sec Battery voltage: more than 11 V¹ The following DTCs are not detected: ECT sensor No. 1: P0117:00 and P0118:00 TP sensor No. 1: P0122:00 and P0123:00 TP sensor No. 2: P0222:00 and P0223:00 Purge solenoid valve: P0443:00 CV solenoid valve: P0446:00 MAF sensor: P0100:00 Fuel tank pressure sensor: P0451:00, P0452:00 and P0453:00 IAT sensor No. 1: P0110:00 MAP sensor: P0069:00, P0107:00 and P0108:00 BARO sensor: P2226:00, P2228:00 and P2229:00 VSS signal: P0500:00 Fuel gauge sender unit: P0461:00, P0462:00 and P0463:00 P0456:00 Fuel level in fuel tank: 15-85 %¹ Period ignition is switched off before engine starts: 210 min or more Barometric pressure: 72.23 kPa {0.7365 kgf/cm² , 10.48 psi} or more¹ Time elapsed from engine start: 15-90 min Desired ambient air temperature: 4.44-37.78°C {40.0-100.0°F}¹ The following DTCs are not detected: Fuel tank pressure sensor: P0451:00, P0452:00 and P0453:00 Purge solenoid valve: P0443:00 CV solenoid valve: P0446:00 EVAP monitor: P0455:00, P0457:00, P144A:00 and P1450:00 Fuel gauge sender unit: P0461:00, P0462:00 and P0463:00 ^1 : Standard can be verified by displaying PIDs using M-MDS
	Malfunction determination period	75 s period
	Drive cycle	2
	Self test type	CMDTC self test
	Sensor used	Fuel tank pressure sensor
Fail-safe function	Not applicable
Vehicle status when DTCs are output	Heating is ineffective after engine is started
Possible cause	Missing or loose fuel filler cap Fuel filler cap malfunction Fuel tank pressure sensor malfunction CV solenoid valve malfunction Purge solenoid valve malfunction Evaporative gas passage malfunction Improper connection of evaporative hose Evaporative hose damaged Pressure control valve malfunction Charcoal canister main malfunction Charcoal canister sub malfunction Catch tank malfunction Fuel pump unit loose Fuel tank malfunction PCM malfunction