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AutoCodes - Generic - P3191

P3191 Code - Engine Does Not Start

- Code Popularity: 3,233 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P3191?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other 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).
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How to Fix the DTC P3191?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Code Tech Notes





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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P3191 code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

Code P3191 Description

The 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 the 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 the abnormal condition is detected. The Diagnostic Trouble Code (DTC) P3191 is set if the 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.

OBDII Code P3191 - Engine Does Not Start - AutoCodes.com
P3191 Code - Engine Does Not Start

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Code P3191 comments

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