Top 3 OBD DTC Codes May Cause the Check Engine Light Of Toyota Fortuner
The Toyota Fortuner is a popular SUV known for its reliability and performance. However, even the best vehicles can experience issues that trigger the check engine light. The most common cause of the check engine light is a diagnostic trouble code (DTC) stored in the vehicle’s onboard computer. In this article, we will be discussing the top 3 OBD DTC codes that may cause the check engine light to illuminate in your Toyota Fortuner.
Fortuner DTC B1801
DTC B1801 is a diagnostic trouble code related to the driver’s side airbag module. This code indicates that there is an open circuit in the driver’s airbag squib circuit. The airbag system is a critical safety component of the vehicle, and any issues with the system should be addressed immediately.
When the DTC B1801 code is present, the following symptoms may be observed:
- Airbag warning light is illuminated on the dashboard.
- The driver’s airbag may not deploy properly in the event of an accident.
- Potential intermittent airbag system issues or false activations.
The most common causes of the DTC B1801 code include:
- Malfunctioning or damaged driver’s side airbag module.
- Faulty wiring or connections in the driver’s airbag squib circuit.
- Corrosion or damage in the airbag system connectors.
How to Clear the Code:
To clear the DTC B1801 code, follow these steps:
- Fix the problem that caused the code to appear. This may involve repairing or replacing the driver’s side airbag module, addressing wiring issues, or cleaning and repairing damaged connectors.
- Use an OBD scan tool to clear the code. It is not recommended to disconnect the battery to reset the code, as this can cause the ECU to lose important adaptive learning data.
Toyota Fortuner DTC P1604
DTC (Diagnostic Trouble Code) P1604 is related to the Startability Malfunction. This code indicates that the Engine Control Module (ECM) has detected a problem with the vehicle’s starting system, which prevents the engine from starting or causes difficulty in starting the engine.
Symptoms associated with DTC P1604 can include:
- Difficulty starting the engine
- Intermittent starting issues
- Engine stalling
- Check engine light illuminated
Possible causes for DTC P1604 are:
- Faulty starter motor or solenoid
- Worn or damaged ignition components
- Low battery voltage or weak battery
- Malfunctioning Engine Control Module (ECM)
- Faulty sensors or actuators affecting engine starting
How to Clear the Code:
Before attempting to clear the code, diagnose and fix the underlying problem first. To clear DTC P1604, use an OBD-II scan tool instead of disconnecting the battery, as disconnecting the battery will reset the ECU’s adaptive learning and may lead to further issues. Once the problem is resolved, use the scan tool to erase the code and reset the check engine light.
Toyota Fortuner DTC P0717
DTC P0717 is an error code related to the Input/Turbine Speed Sensor Circuit. This code indicates that the ECM/PCM has detected an issue with the input/turbine speed sensor’s signal, which can affect the vehicle’s transmission performance and driveability.
The primary part associated with a P0717 code is the input/turbine speed sensor. The part number will vary depending on the specific year, make, and model of your Toyota Innova.
The input/turbine speed sensor is responsible for monitoring the rotational speed of the input shaft or turbine within the transmission. The ECM/PCM uses this information to control and manage the transmission’s shifting and torque converter operation. A P0717 code indicates that there is a problem with the sensor’s signal, leading to potential transmission performance issues.
Common symptoms of a P0717 code include:
– Check engine light illuminated
– Transmission shifting problems or harsh shifts
– Reduced fuel efficiency
– Transmission slipping
– Vehicle enters “limp mode” or failsafe mode
The primary cause of a P0717 code is a faulty input/turbine speed sensor or a problem with the sensor’s wiring or connections. This can be due to a variety of factors, such as manufacturing defects, damage, or corrosion.
The input/turbine speed sensor is typically located on the transmission housing. Refer to your vehicle’s service manual for the specific location of the sensor in your Toyota Innova.
How to Fix the Problem
To fix a P0717 code, follow these steps:
1. Verify the code using an OBD-II scanner.
2. Locate the input/turbine speed sensor on your vehicle’s transmission.
3. Inspect the sensor and its wiring for damage, corrosion, or loose connections. Repair or replace any damaged components.
4. If the issue persists, the input/turbine speed sensor may need to be replaced.
5. Clear the code using an OBD-II scanner and test drive the vehicle to ensure the problem has been resolved and the check engine light remains off.
How Difficult to Fix
Fixing a P0717 code can range from moderate to difficult, depending on the specific issue and the sensor’s location. Inspecting and replacing the sensor and its wiring can typically be done by a DIY mechanic with some experience, but some vehicles may require more advanced tools or expertise.
Can You Drive With This Code
While it may be possible to drive with a P0717 code, doing so can lead to poor transmission performance, reduced fuel efficiency, and potential damage to other components. It is recommended to address the issue as soon as possible.
How to Clear the Code
Once the issue has been resolved, you can clear the code using an OBD-II scanner. Follow the scanner’s instructions to erase the code and reset the check engine light.
Tools Need to Use
The tools you’ll need to diagnose and fix a P0717 code include:
– OBD-II scanner
– Basic hand tools (wrenches, sockets, screwdrivers, pliers)
– Digital multimeter (for testing sensor wiring and connections)
– Service manual for your specific vehicle
Step-by-Step Diagnostic Procedure
Follow these steps to diagnose and fix a P0717 code:
1. Connect the OBD-II scanner to your vehicle’s diagnostic port and read the stored trouble codes. Note the P0717 code and any other related codes.
2. Consult your vehicle’s service manual or online resources for the specific location of the input/turbine speed sensor on your Toyota Innova.
3. Visually inspect the sensor and its wiring for damage, corrosion, or loose connections. Repair or replace any damaged components.
4. Use a digital multimeter to test the sensor wiring and connections for continuity and voltage. Repair or replace any damaged wiring.
5. If the issue persists after completing the above steps, consider replacing the input/turbine speed sensor.
6. Once the issue has been resolved, use the OBD-II scanner to clear the code and reset the check engine light. Test drive the vehicle to ensure the problem has been resolved and the check engine light remains off.
WORDS FROM ERWIN SALARDA
it’s important to stay knowledgeable about the top 3 OBD DTC codes that could be causing the check engine light in your Toyota Fortuner. This way, you can take action early on to diagnose and fix the problem, before it becomes a bigger issue. Regular check-ups and maintenance for your vehicle will also help prevent these codes from being triggered. And if you’re ever uncertain about any repairs, it’s always best to seek the advice of a professional mechanic. They have the expertise and tools to diagnose and repair your vehicle effectively.