Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA2012PRIUS THREEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 41 (ENGINE CONTROL SYSTEM (PLUG-IN) (DIAGNOSTIC CODES (P0505-U0293) & CIRCUIT TESTS))SFI SYSTEMDTC P219A: BANK 1 AIR-FUEL RATIO IMBALANCETYPICAL MALFUNCTION THRESHOLDS
2012 Toyota Prius Three
Typical Malfunction Thresholds
2012 Toyota Prius ThreeSECTION Typical Malfunction Thresholds
WARNING: This page is about a different variant/trim than selected.
AIR FUEL RATIO SENSOR MONITORING METHOD
| Air fuel ratio sensor monitoring method criteria (rich side imbalance) | 0.046 or more |
CRANKSHAFT POSITION SENSOR MONITORING METHOD (FIRST JUDGMENT)
| Crankshaft position sensor monitoring method criteria (first judgment) | 1.5 or more |
CRANKSHAFT POSITION SENSOR MONITORING METHOD (SECOND JUDGMENT)
| Crankshaft position sensor monitoring method criteria (second judgment) | 1 or more |
HINT:
If the first judgment while driving shows that the value of Engine Speed Fluctuation Avg (worst value) is between 0.5 and 1.5, then second judgment will be performed when the vehicle is stopped and the engine is idling.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.