P0172 2001 TOYOTA HIGHLANDER Code - System Too Rich Bank 1
|P0172 2001 TOYOTA HIGHLANDER code possible causes
- Faulty Front Heated Oxygen Sensor
- Faulty Spark Plugs
- Faulty Mass Air Flow (MAF) sensor
- Exhaust Gas Leaks
- Ignition Misfiring
- Incorrect Fuel Pressure
- Faulty Fuel Injectors
|How do I fix the P0172 2001 TOYOTA HIGHLANDER 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 connector's pins.
|Cost of diagnosing the P0172 2001 TOYOTA HIGHLANDER code
Labor: 1.0The cost of diagnosing the P0172 2001 TOYOTA HIGHLANDER code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
|When is the P0172 2001 TOYOTA HIGHLANDER code detected?- Fuel injection system does not operate properly.
- The amount of mixture ratio compensation is too large. (The mixture ratio is too rich.)
|What are P0172 2001 TOYOTA HIGHLANDER code possible symptoms?
- Engine Light ON (or Service Engine Soon Warning Light)
- Excessive Fuel Consumption
|P0172 2001 TOYOTA HIGHLANDER code descriptionWith the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture ratio can be brought closely to the theoretical mixture ratio based on the mixture ratio feedback signal from the heated oxygen sensors 1. The Engine Control Module (ECM) calculates the necessary compensation to correct the offset between the actual and the theoretical ratios.
In case the amount of the compensation value is extremely large (The actual mixture ratio is too lean.), the ECM judges the condition as the fuel injection system malfunction and light up the MIL (2 trip detection logic).
|Need more information with the P0172 2001 TOYOTA HIGHLANDER code?Need more information on how to fix the P0172 2001 TOYOTA HIGHLANDER code? Get Access to Factory Service Manuals
|Need help with a P0172 2001 TOYOTA HIGHLANDER code?Get the P0172 2001 Toyota Highlander code diagnosed by a professional: Find a repair shop in your area
|P0172 2001 TOYOTA HIGHLANDER code commentsHelp us improve AutoCodes.com. Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the P0172 2001 Toyota Highlander code? Have you replaced any parts?
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