The 11 Most Common Toyota 4Runner DTC Issues

The 11 Most Common Toyota 4Runner DTC Issues
The 11 Most Common Toyota 4Runner DTC Issues

The 11 Most Common Toyota 4Runner DTC Issues

Are you the owner of a Toyota 4Runner? If so, I have compiled the 11 most common DTCs you will find on your car: B2284, B1248, B1241, C1201, C1408, 42, U0416, U1104, P0717, P0430, and P0606. Those are the 11 DTCs.
The Toyota 4Runner is a popular SUV known for its reliability and durability. However, like any other vehicle, it can still experience issues with its diagnostics systems. In this article, we will explore the 11 most common diagnostic trouble codes (DTC) that Toyota 4Runner owners may encounter. From engine misfires to transmission problems, we will cover the symptoms, causes, and solutions for these DTC issues. Whether you’re a seasoned mechanic or a novice DIYer, this guide will help you diagnose and fix your Toyota 4Runner’s DTC issues.

THE 11 OBD DTC

4RUNNER  DTC B2284:

Description:

  • The B2284 code is a generic OBD-II diagnostic trouble code indicating that the Engine Control Module (ECM) has detected a problem with the Engine Coolant Temperature (ECT) sensor circuit.

Symptoms:

  • Engine warning light illuminated on the dashboard
  • Engine running poorly
  • Engine may stall or misfire
  • Engine may not start

Cause:

  • Malfunctioning ECT sensor
  • Wiring issues in the ECT sensor circuit
  • Failed Engine Control Module
  • Failed Engine Cooling Fan
  • Engine Coolant leaks
  • Possible Location:
  • The ECT sensor is typically located near the thermostat housing.

How to Fix the Problem:

  • Check the ECT sensor and its wiring for any signs of damage or corrosion
  • Inspect the Engine Cooling Fan and replace it if necessary
  • Check the Engine Coolant level and fix any leaks
  • Replace the ECT sensor if necessary
  • Replace the Engine Control Module if necessary

How Difficult to Fix:

  • The difficulty of fixing this issue will vary depending on the root cause of the problem. Inspecting the ECT sensor and its wiring is relatively simple, but replacing the Engine Control Module or Engine Cooling Fan can be more difficult.

Can You Drive With This Code:

  • It is not recommended to drive with this code as it can lead to further damage to the engine and potentially cause a stall or misfire while driving.

How to Clear the Code:

  • The code can be cleared using an OBD-II scan tool or by disconnecting the vehicle’s battery for a few minutes.

Tools Needed to Use:

  • OBD-II scan tool
  • Multimeter
  • Socket set
  • Wrench set
  • Engine Coolant
  • Engine Coolant Pressure Tester (Optional)

4RUNNER DTC B1248:

Description: The B1248 code is a generic OBD-II diagnostic trouble code indicating that the Engine Control Module (ECM) has detected a problem with the Electric Cooling Fan Circuit.

Symptoms:

  • Engine warning light illuminated on the dashboard
  • Engine overheating
  • Engine Cooling Fan not functioning
  • Engine running poorly

Cause:

  • Malfunctioning Electric Cooling Fan
  • Wiring issues in the Electric Cooling Fan circuit
  • Failed Engine Control Module
  • Failed Engine Cooling Fan Relay
  • Failed Engine Cooling Fan Control Module

Possible Location: The Electric Cooling Fan is typically located near the radiator.

How to Fix the Problem:

  • Check the Electric Cooling Fan and its wiring for any signs of damage or corrosion
  • Inspect the Engine Cooling Fan Relay and replace it if necessary
  • Inspect the Engine Cooling Fan Control Module and replace it if necessary
  • Replace the Electric Cooling Fan if necessary
  • Replace the Engine Control Module if necessary

How Difficult to Fix: The difficulty of fixing this issue will vary depending on the root cause of the problem. Inspecting the Electric Cooling Fan and its wiring is relatively simple, but replacing the Engine Control Module or Engine Cooling Fan Control Module can be more difficult.

Can You Drive With This Code: It is not recommended to drive with this code as it can lead to further damage to the engine and potentially cause overheating while driving.

How to Clear the Code: The code can be cleared using an OBD-II scan tool or by disconnecting the vehicle’s battery for a few minutes. Note that disconnecting the battery will reset the relearn of the ECU.

Tools Needed to Use:

  • OBD-II scan tool
  • Multimeter
  • Socket set
  • Wrench set
  • Engine Coolant
  • Engine Coolant Pressure Tester (Optional)

4RUNNER DTC B1241:

Description: The B1241 code is a generic OBD-II diagnostic trouble code indicating that the Engine Control Module (ECM) has detected a problem with the Air Conditioning Clutch Relay Circuit.

Symptoms:

  • Engine warning light illuminated on the dashboard
  • Air conditioning system not functioning
  • Engine cooling fan not functioning
  • Engine running poorly

Cause:

  • Malfunctioning Air Conditioning Clutch Relay
  • Wiring issues in the Air Conditioning Clutch Relay circuit
  • Failed Engine Control Module
  • Failed Air Conditioning Compressor Clutch

Possible Location: The Air Conditioning Clutch Relay is typically located in the engine compartment, near the battery.

How to Fix the Problem:

  • Check the Air Conditioning Clutch Relay and its wiring for any signs of damage or corrosion
  • Inspect the Air Conditioning Compressor Clutch and replace it if necessary
  • Replace the Air Conditioning Clutch Relay if necessary
  • Replace the Engine Control Module if necessary

How Difficult to Fix: The difficulty of fixing this issue will vary depending on the root cause of the problem. Inspecting the Air Conditioning Clutch Relay and its wiring is relatively simple, but replacing the Engine Control Module or Air Conditioning Compressor Clutch can be more difficult.

Can You Drive With This Code: It is possible to drive with this code, but the air conditioning system will not function. This may not be a problem in cool weather, but can be an issue in hot weather.

How to Clear the Code: The code can be cleared using an OBD-II scan tool or by disconnecting the vehicle’s battery for a few minutes. Note that disconnecting the battery will reset the relearn of the ECU.

Tools Needed to Use:

  • OBD-II scan tool
  • Multimeter
  • Socket set
  • Wrench set
  • Refrigerant
  • Refrigerant Pressure Gauge (Optional)

4RUNNER DTC C1201:

Description: The C1201 code is a manufacturer-specific diagnostic trouble code indicating that the Engine Control Module (ECM) has detected a problem with the Engine Control System.

Symptoms:

  • Engine warning light illuminated on the dashboard
  • Engine running poorly
  • Engine may stall or misfire
  • Engine may not start

Cause:

  • Failed Engine Control Module
  • Wiring issues in the Engine Control System
  • Failed Engine Sensors (e.g. Throttle Position Sensor, Mass Airflow Sensor, etc.)
  • Failed Fuel Injectors
  • Failed Ignition System Components

Possible Location: The Engine Control Module and the various engine sensors are located throughout the engine and engine compartment.

How to Fix the Problem:

  • Inspect the Engine Control Module and replace it if necessary
  • Check the wiring in the Engine Control System for any signs of damage or corrosion
  • Inspect the Engine Sensors and replace any that are not functioning properly
  • Inspect the Fuel Injectors and replace any that are not functioning properly
  • Inspect the Ignition System Components and replace any that are not functioning properly

How Difficult to Fix: The difficulty of fixing this issue will vary depending on the root cause of the problem. Inspecting the Engine Control Module and its wiring is relatively simple, but replacing Engine Sensors or Ignition System Components can be more difficult.

Can You Drive With This Code: It is not recommended to drive with this code as it can lead to further damage to the engine and potentially cause a stall or misfire while driving.

How to Clear the Code: The code can be cleared using an OBD-II scan tool or by disconnecting the vehicle’s battery for a few minutes. Note that disconnecting the battery will reset the relearn of the ECU.

Tools Needed to Use:

  • OBD-II scan tool
  • Multimeter
  • Socket set
  • Wrench set
  • Fuel Pressure Tester (Optional)

4RUNNER DTC C1408:

Description: The C1408 code is a manufacturer-specific diagnostic trouble code indicating that the Engine Control Module (ECM) has detected a problem with the ABS Pump Motor Circuit.

Symptoms:

  • ABS warning light illuminated on the dashboard
  • ABS system not functioning
  • Brakes may feel less responsive
  • Brakes may feel pulsating or grabbing

Cause:

  • Failed ABS Pump Motor
  • Wiring issues in the ABS Pump Motor circuit
  • Failed Engine Control Module
  • Failed ABS Control Module
  • Failed ABS Pump Motor Relay

Possible Location: The ABS Pump Motor is typically located in the engine compartment, near the ABS Control Module.

How to Fix the Problem:

  • Check the ABS Pump Motor and its wiring for any signs of damage or corrosion
  • Inspect the ABS Pump Motor Relay and replace it if necessary
  • Replace the ABS Pump Motor if necessary
  • Replace the ABS Control Module if necessary
  • Replace the Engine Control Module if necessary

How Difficult to Fix: The difficulty of fixing this issue will vary depending on the root cause of the problem. Inspecting the ABS Pump Motor and its wiring is relatively simple, but replacing the ABS Control Module or Engine Control Module can be more difficult.

Can You Drive With This Code: It is possible to drive with this code, but the ABS system will not function. This may affect the vehicle’s braking performance in emergency braking situations.

How to Clear the Code: The code can be cleared using an OBD-II scan tool or by disconnecting the vehicle’s battery for a few minutes. Note that disconnecting the battery will reset the relearn of the ECU.

Tools Needed to Use:

  • OBD-II scan tool
  • Multimeter
  • Socket set
  • Wrench set
  • Brake Fluid
  • Brake Bleeder Kit (Optional)

4RUNNER DTC 42:

Description: The 42 code is a generic OBD-II diagnostic trouble code indicating that the Engine Control Module (ECM) has detected a problem with the Electronic Spark Timing (EST) circuit.

Symptoms:

  • Engine warning light illuminated on the dashboard
  • Engine running poorly
  • Engine may stall or misfire
  • Engine may not start

Cause:

  • Malfunctioning Electronic Spark Timing (EST) circuit
  • Wiring issues in the Electronic Spark Timing (EST) circuit
  • Failed Engine Control Module
  • Failed Ignition Control Module
  • Failed Ignition Coil
  • Failed Spark Plug

Possible Location: The Electronic Spark Timing (EST) circuit components are located throughout the engine and engine compartment.

How to Fix the Problem:

  • Check the Electronic Spark Timing (EST) circuit and its wiring for any signs of damage or corrosion
  • Inspect the Ignition Control Module and replace it if necessary
  • Inspect the Ignition Coil and replace it if necessary
  • Inspect the Spark Plug and replace it if necessary
  • Replace the Engine Control Module if necessary

How Difficult to Fix: The difficulty of fixing this issue will vary depending on the root cause of the problem. Inspecting the Electronic Spark Timing (EST) circuit and its wiring is relatively simple, but replacing the Ignition Control Module or Engine Control Module can be more difficult.

Can You Drive With This Code: It is not recommended to drive with this code as it can lead to further damage to the engine and potentially cause a stall or misfire while driving.

How to Clear the Code: The code can be cleared using an OBD-II scan tool or by disconnecting the vehicle’s battery for a few minutes. Note that disconnecting the battery will reset the relearn of the ECU.

Tools Needed to Use:

  • OBD-II scan tool
  • Multimeter
  • Socket set
  • Wrench set
  • Spark Plug Socket
  • Ignition Tester (Optional)

4RUNNER DTC U0416:

Description: The U0416 code is a manufacturer-specific diagnostic trouble code indicating that the Engine Control Module (ECM) has detected a problem with the Invalid Data Received from the Body Control Module.

Symptoms:

  • Engine warning light illuminated on the dashboard
  • Engine running poorly
  • Engine may stall or misfire
  • Engine may not start
  • Various electrical systems may not function properly (e.g. power windows, power door locks, etc.)

Cause:

  • Communication failure between the Engine Control Module and the Body Control Module
  • Failed Engine Control Module
  • Failed Body Control Module
  • Wiring issues in the communication circuits between the Engine Control Module and the Body Control Module

Possible Location: The Engine Control Module and the Body Control Module are located throughout the vehicle, typically in the engine compartment or passenger compartment.

How to Fix the Problem:

  • Check the communication circuits between the Engine Control Module and the Body Control Module for any signs of damage or corrosion
  • Replace the Body Control Module if necessary
  • Replace the Engine Control Module if necessary

How Difficult to Fix: The difficulty of fixing this issue will vary depending on the root cause of the problem. Inspecting the communication circuits between the Engine Control Module and the Body Control Module is relatively simple, but replacing the Engine Control Module or Body Control Module can be more difficult.

Can You Drive With This Code: It is possible to drive with this code, but various electrical systems may not function properly. Additionally, the engine may run poorly or stall.

How to Clear the Code: The code can be cleared using an OBD-II scan tool or by disconnecting the vehicle’s battery for a few minutes. Note that disconnecting the battery will reset the relearn of the ECU.

Tools Needed to Use:

  • OBD-II scan tool
  • Multimeter
  • Socket set
  • Wrench set

4RUNNER DTC U1104:

Description: The U1104 code is a manufacturer-specific diagnostic trouble code indicating that the Engine Control Module (ECM) has detected a problem with the Lost Communication with Engine Management Module.

Symptoms:

  • Engine warning light illuminated on the dashboard
  • Engine running poorly
  • Engine may stall or misfire
  • Engine may not start
  • Various electrical systems may not function properly (e.g. power windows, power door locks, etc.)

Cause:

  • Communication failure between the Engine Control Module and the Engine Management Module
  • Failed Engine Control Module
  • Failed Engine Management Module
  • Wiring issues in the communication circuits between the Engine Control Module and the Engine Management Module

Possible Location: The Engine Control Module and the Engine Management Module are located throughout the vehicle, typically in the engine compartment or passenger compartment.

How to Fix the Problem:

  • Check the communication circuits between the Engine Control Module and the Engine Management Module for any signs of damage or corrosion
  • Replace the Engine Management Module if necessary
  • Replace the Engine Control Module if necessary

How Difficult to Fix: The difficulty of fixing this issue will vary depending on the root cause of the problem. Inspecting the communication circuits between the Engine Control Module and the Engine Management Module is relatively simple, but replacing the Engine Control Module or Engine Management Module can be more difficult.

Can You Drive With This Code: It is possible to drive with this code, but various electrical systems may not function properly. Additionally, the engine may run poorly or stall.

How to Clear the Code: The code can be cleared using an OBD-II scan tool or by disconnecting the vehicle’s battery for a few minutes. Note that disconnecting the battery will reset the relearn of the ECU.

Tools Needed to Use:

  • OBD-II scan tool
  • Multimeter
  • Socket set
  • Wrench set

4RUNNER DTC P0717:

Description: The P0717 code is a generic OBD-II diagnostic trouble code indicating that the Engine Control Module (ECM) has detected a problem with the Input Speed Sensor Circuit.

Symptoms:

  • Engine warning light illuminated on the dashboard
  • Engine running poorly
  • Engine may stall or misfire
  • Engine may not start
  • Transmission may not shift properly

Cause:

  • Malfunctioning Input Speed Sensor
  • Wiring issues in the Input Speed Sensor circuit
  • Failed Engine Control Module
  • Failed Transmission Control Module

Possible Location: The Input Speed Sensor is typically located on the transmission.

How to Fix the Problem:

  • Check the Input Speed Sensor and its wiring for any signs of damage or corrosion
  • Replace the Input Speed Sensor if necessary
  • Replace the Engine Control Module if necessary
  • Replace the Transmission Control Module if necessary

How Difficult to Fix: The difficulty of fixing this issue will vary depending on the root cause of the problem. Inspecting the Input Speed Sensor and its wiring is relatively simple, but replacing the Engine Control Module or Transmission Control Module can be more difficult.

Can You Drive With This Code: It is possible to drive with this code, but the engine may run poorly or stall. Additionally, the transmission may not shift properly, which could affect the vehicle’s ability to drive safely.

How to Clear the Code: The code can be cleared using an OBD-II scan tool or by disconnecting the vehicle’s battery for a few minutes. Note that disconnecting the battery will reset the relearn of the ECU.

Tools Needed to Use:

  • OBD-II scan tool
  • Multimeter
  • Socket set
  • Wrench set
  • Transmission Jack (Optional)

4RUNNER DTC P0430:

Description: The P0430 code is a generic OBD-II diagnostic trouble code indicating that the Engine Control Module (ECM) has detected a problem with the Catalyst System Efficiency Below Threshold (Bank 2).

Symptoms:

  • Engine warning light illuminated on the dashboard
  • Engine may run poorly
  • Engine may stall or misfire
  • Engine may not start
  • Reduced fuel efficiency

Cause:

  • Failed catalytic converter
  • Engine misfire
  • Wiring issues in the catalytic converter circuit
  • Failed Engine Control Module
  • Fuel system issues

Possible Location: The catalytic converter is typically located in the exhaust system, near the engine.

How to Fix the Problem:

  • Inspect the catalytic converter and replace it if necessary
  • Repair any engine misfires
  • Check the wiring in the catalytic converter circuit for any signs of damage or corrosion
  • Replace the Engine Control Module if necessary
  • Repair any fuel system issues

How Difficult to Fix: The difficulty of fixing this issue will vary depending on the root cause of the problem. Replacing the catalytic converter is relatively straightforward, but repairing engine misfires or fuel system issues can be more difficult.

Can You Drive With This Code: It is possible to drive with this code, but the engine may run poorly and reduce fuel efficiency. Additionally, a failed catalytic converter can lead to increased emissions, which could result in a failed emissions test.

How to Clear the Code: The code can be cleared using an OBD-II scan tool or by disconnecting the vehicle’s battery for a few minutes. Note that disconnecting the battery will reset the relearn of the ECU.

Tools Needed to Use:

  • OBD-II scan tool: to diagnose the problem and clear the code
  • Multimeter: to test the wiring in the catalytic converter circuit
  • Socket set: to remove the catalytic converter
  • Wrench set: to remove the catalytic converter
  • Oxygen Sensor Socket: to remove the oxygen sensor (if necessary)
  • Exhaust System Tools: to remove and replace the catalytic converter
  • Jack and Jack Stands: to support the vehicle while working on the exhaust system

4RUNNER DTC P0606:

Description: The P0606 code is a generic OBD-II diagnostic trouble code indicating that the Engine Control Module (ECM) has detected an internal control module processor error.

Symptoms:

  • Engine warning light illuminated on the dashboard
  • Engine may run poorly
  • Engine may stall or misfire
  • Engine may not start
  • Reduced vehicle performance

Cause:

  • Failed Engine Control Module
  • Corrupted software in the Engine Control Module
  • Wiring issues in the Engine Control Module circuit
  • Failed Powertrain Control Module

Possible Location: The Engine Control Module and Powertrain Control Module are typically located in the engine compartment.

How to Fix the Problem:

  • Replace the Engine Control Module if necessary
  • Reprogram the Engine Control Module if necessary
  • Check the wiring in the Engine Control Module circuit for any signs of damage or corrosion
  • Replace the Powertrain Control Module if necessary

How Difficult to Fix: The difficulty of fixing this issue will vary depending on the root cause of the problem. Replacing the Engine Control Module can be more difficult than checking the wiring in the Engine Control Module circuit or reprogramming the Engine Control Module.

Can You Drive With This Code: It is not recommended to drive with this code, as the engine may run poorly or stall. Additionally, the vehicle’s performance may be reduced.

How to Clear the Code: The code can be cleared using an OBD-II scan tool or by disconnecting the vehicle’s battery for a few minutes. Note that disconnecting the battery will reset the relearn of the ECU.

Tools Needed to Use:

  • OBD-II scan tool: to diagnose the problem and clear the code
  • Laptop with diagnostic software: to reprogram the Engine Control Module (if necessary)
  • Multimeter: to test the wiring in the Engine Control Module circuit
  • Socket set: to remove the Engine Control Module
  • Wrench set: to remove the Engine Control Module

WORDS FROM ERWIN SALARDA
Diagnosing and fixing DTC issues in your Toyota 4Runner can seem daunting, but with the right tools and knowledge, it can be a manageable task. Always consult your vehicle’s owner’s manual and a professional mechanic if you’re unsure about a repair. Regular maintenance and inspections can help prevent DTC issues from occurring in the first place. By staying on top of your Toyota 4Runner’s diagnostics

erwincsalarda

Importer and Dealer of Automotive Equipment in the Philippines. Product Inquiry: Call/Text/Viber: 0915 5686 4578 Email: [email protected] Facebook: Erwin C. Salarda

You may also like...

website hit counter