P3191 TOYOTA Possible Causes
- Air induction system malfunction.
- Defective throttle body.
- Improper fuel pressure.
- Defective engine.
- Defective Mass Airflow (MAF) meter.
- Vehicle is out of fuel.
- Defective Engine Coolant Temperature (ECT) sensor.
- Defective crankshaft position sensor.
- Defective camshaft position sensor.
- Defective Engine Control Module (ECM).
First diagnose P3191 TOYOTA code
Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded terminals.
P3191 TOYOTA Tech Notes
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Cost of diagnosing the P3191 TOYOTA code
Labor: 1.0The cost of diagnosing the P3191 TOYOTA code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
P3191 TOYOTA Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P3191 Toyota DescriptionThe Hybrid Vehicle Electronic Control Unit (HV ECU) delivers data to the Engine Control Module (ECM) for such items as power output required for the engine (required output), estimated torque produced by the engine, engine RPM of control target RPM and whether engine is in start mode or not. Based on required output and target RPM, the ECM calculates a target torque that is to be produced by the engine and compares it with the estimated torque. If estimated torque is very low compared with the target torque or engine start mode continues at engine RPM or for the duration calculated by engine coolant temperature, as abnormal condition is detected. The Diagnostic Trouble Code (DTC) P3191 is set if following conditions continue at a fixed engine RPM or for a fixed length of time:
-Communication with HV ECU is normal.
-Engine RPM is a fixed value or more.
-Engine start mode is not active.
P3191 TOYOTA More InformationNeed more information on how to fix the P3191 TOYOTA code?
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