Top 4 Most Common OBD DTCs for Toyota Hiace
If you own a Toyota Hiace, it’s important to understand the most common OBD DTCs (Diagnostic Trouble Codes) that can occur. These codes can give you valuable insight into issues with your vehicle’s performance and help you diagnose and fix the problem. In this article, we will discuss the top 4 most common OBD DTCs for the Toyota Hiace – P0340, P0500, P1220, and P0122.
Toyota Hiace OBD DTC P0340
Description:
The Toyota Hiace OBD DTC P0340 is a generic powertrain code that indicates a problem with the camshaft position sensor circuit. This code is typically set when the powertrain control module (PCM) detects a problem with the signal coming from the camshaft position sensor. This code can be set in gasoline or diesel engines.
Symptoms:
The symptoms of a P0340 code can vary depending on the specific vehicle and the severity of the problem. Some common symptoms include:
- Rough idle
- Stalling
- Misfire
- Reduced engine performance
- Illuminated check engine light
Cause:
There are several possible causes for a P0340 code, including:
- Faulty camshaft position sensor
- Open or short in the camshaft position sensor circuit
- Damaged wiring or connectors in the camshaft position sensor circuit
- Failed PCM or other control module
Possible Location:
The camshaft position sensor is typically located on the engine block or cylinder head near the camshaft or crankshaft. The exact location will vary depending on the specific vehicle and engine type.
How to Fix the Problem:
The fix for a P0340 code will depend on the specific cause of the problem. Some common repairs include:
- Replacing the camshaft position sensor
- Repairing or replacing damaged wiring or connectors in the camshaft position sensor circuit
- Replacing the PCM or other control module
How Difficult to Fix:
The difficulty of fixing a P0340 code will vary depending on the specific cause of the problem. In some cases, the repair can be relatively straightforward and inexpensive. In other cases, the repair can be more complex and expensive.
Can You Drive With This Code:
It is not recommended to drive a vehicle with a P0340 code as it can cause the engine to run poorly or stall, leading to a potential safety hazard. It is best to have the vehicle inspected and repai#008080 as soon as possible to prevent further damage to the engine or other components.
How to Clear the Code:
The code can be clea#008080 by disconnecting the battery, which will reset the PCM. However, please note that this will not fix the underlying problem and the code will likely return if the issue is not addressed. The code can also be clea#008080 using a diagnostic scan tool, which is commonly available at auto parts stores or through a professional mechanic.
Tools Needed to Use:
The tools needed to diagnose and repair a P0340 code will vary depending on the specific vehicle and the cause of the problem. Some common tools include:
- Diagnostic scan tool – This tool is used to read and clear DTC codes and to access live data from the vehicle’s engine control system.
- Multimeter – This tool is used to test the electrical continuity and resistance in the camshaft position sensor circuit and wiring.
- Wiring diagram – This is a diagram that shows the routing and color coding of the vehicle’s wiring system, which can be useful in tracing and repairing damaged wires or connectors.
Step-by-Step Diagnostic Procedure:
The following is a general step-by-step diagnostic procedure for a P0340 code:
- Connect a diagnostic scan tool to the vehicle’s OBD-II system and retrieve the DTC code(s).
- Visual inspection of the camshaft position sensor circuit and wiring, including the sensor itself, the wiring harness, and connectors for any signs of damage or corrosion.
- Test the camshaft position sensor signal using a multimeter. Check the resistance and continuity of the sensor’s wiring and connectors, as well as the voltage of the signal at the sensor and at the PCM.
- If the camshaft position sensor circuit and wiring are okay, inspect the PCM or other control module for any signs of physical damage or corrosion.
- If the problem is not found in the camshaft position sensor circuit, wiring, or PCM, other possible causes such as a failed crankshaft position sensor, a faulty ignition system, or a malfunctioning fuel system should be conside#008080 and tested as necessary.
- Based on the results of the diagnostic tests, repair or replace any damaged or failed components as necessary.
- Re-test the system with a diagnostic scan tool to verify that the code has been clea#008080 and that the vehicle is running normally.
Note: This is a general diagnostic procedure and may not apply to every vehicle with a P0340 code. It is always best to consult a repair manual or professional mechanic for the specific vehicle and engine.
Toyota Hiace OBD DTC: P0500
Toyota Hiace OBD trouble code P0500 indicates a malfunction in the vehicle speed sensor circuit.
Description:
The P0500 code indicates that the vehicle’s speed sensor circuit is malfunctioning or has failed. The vehicle speed sensor is responsible for measuring the speed of the vehicle and sending that information to the engine control module (ECM).
Symptoms:
The symptoms of a P0500 code can vary depending on the vehicle. Some common symptoms include:
- Check Engine Light illuminated
- Speedometer not working
- Erratic or incorrect speedometer readings
- ABS malfunction warning light illuminated
Cause:
The most common causes of a P0500 code include:
- Faulty vehicle speed sensor
- Faulty wiring or connections in the speed sensor circuit
- Faulty engine control module (ECM)
Possible Locations:
The vehicle speed sensor is typically located on the transmission output shaft or the differential housing.
How to Fix the Problem:
The following are some common steps to fix the P0500 code:
- Inspect the wiring and connections in the speed sensor circuit
- Replace the vehicle speed sensor if it is faulty
- Replace the engine control module (ECM) if it is faulty
How Difficult to Fix:
Fixing a P0500 code can range from easy to difficult depending on the underlying cause of the problem. In some cases, simply replacing the vehicle speed sensor can resolve the issue. However, if the problem is related to faulty wiring or a faulty engine control module, the repair can be more complicated and may require professional assistance.
Can You Drive With This Code:
It is not recommended to drive with a P0500 code. The code can cause problems with the speedometer and other vehicle systems, which can affect the overall performance and safety of the vehicle.
How to Clear the Code:
To clear the P0500 code, the underlying problem must be fixed. Once the problem is resolved, the code can be cleared using an OBD-II scanner or by disconnecting the battery. However,disconnecting the battery will also reset the learned values in the engine control module, which may cause issues with driveability and emissions until the vehicle completes a series of drive cycles to relearn the values.
Tools Needed to Use:
The tools needed to diagnose and repair a P0500 code may include:
- OBD-II scanner
- Multimeter
- Wiring diagram for the vehicle’s speed sensor circuit
- Replacement vehicle speed sensor
These tools are needed to diagnose the problem with the speed sensor circuit and to replace any faulty components.
Step-by-Step Diagnostic Procedure:
The following are the steps to diagnose and fix a P0500 code:
- Use an OBD-II scanner to read the code and any related codes
- Inspect the wiring and connections in the speed sensor circuit for any damage or corrosion
- Test the vehicle speed sensor using a multimeter to ensure it is functioning correctly
- If the vehicle speed sensor is faulty, replace it with a new one
- If the problem persists, inspect the engine control module (ECM) and replace if necessary
- Clear the code and test drive the vehicle to ensure the problem has been resolved
It is important to follow these steps in order and to thoroughly test each component in the speed sensor circuit to ensure the underlying problem is fixed.
Toyota Hiace OBD DTC: P1220
Description:
The P1220 diagnostic trouble code (DTC) indicates an issue with the fuel pump or its circuit.
Symptoms:
– Difficulty starting the engine
– Engine stalls or hesitates during acceleration
– Loss of power while driving
– Check Engine Light (CEL) is illuminated
Cause:
– Faulty fuel pump
– Fuel pump relay malfunction
– Wiring issues in the fuel pump circuit
– Clogged fuel filter
Possible Location:
– Fuel pump
– Fuel pump relay
– Wiring harness
How to Fix the Problem:
– Replace the fuel pump or fuel pump relay, if faulty
– Repair or replace any damaged wiring in the fuel pump circuit
– Replace the fuel filter, if clogged
How Difficult to Fix:
The difficulty level of fixing the P1220 DTC depends on the specific cause of the issue. If it is simply a matter of replacing the fuel filter, it may be a relatively easy fix. However, if it is a faulty fuel pump or wiring issue, it can be more challenging and may require the help of a professional mechanic.
Can You Drive With This Code:
It is not recommended to drive with the P1220 DTC. The issue can cause your engine to stall or lose power while driving, which can be dangerous.
How to Clear the Code:
To clear the P1220 DTC, you can use an OBD-II scanner or disconnect the battery for a few minutes. However, if the underlying issue is not fixed, the code will likely reappear.
Tools Needed:
OBD-II scanner
Multimeter (for testing wiring and electrical components)
Purpose of Tools:
OBD-II scanner: To read and clear diagnostic trouble codes.
Multimeter: To test wiring and electrical components for continuity, resistance, and voltage.
Step-by-Step Diagnostic Procedure:
1. Connect an OBD-II scanner and retrieve the trouble codes.
2. Inspect the fuel pump and fuel pump relay for any signs of damage or wear.
3. Check the wiring harness for any signs of damage or corrosion.
4. Use a multimeter to test the fuel pump and fuel pump relay for proper voltage and continuity.
5. Test the fuel pressure and fuel flow rate to ensure they are within the manufacturer’s specifications.
6. Replace any faulty components or repair any damaged wiring.
7. Clear the trouble codes with an OBD-II scanner and test drive the vehicle to ensure the issue has been resolved.
Toyota Hiace OBD DTC: P0122
Description:
The P0122 code is a generic powertrain code related to the throttle position sensor (TPS). It indicates that the TPS circuit A voltage output is below the manufacturer’s specified range.
Symptoms:
The symptoms of a P0122 code may include:
- Check Engine Light illuminated
- Reduced engine power
- Delayed acceleration
- Stalling or surging
- Difficulty starting
Cause:
The common causes of a P0122 code may include:
- Failed or faulty TPS
- Corroded or damaged wiring or connectors in the TPS circuit
- Failed or faulty engine control module (ECM)
- Throttle body issues
Possible Location:
The TPS is typically located on the throttle body.
How to Fix the Problem:
The following are some common fixes for a P0122 code:
- Replace the TPS
- Repair or replace corroded or damaged wiring or connectors in the TPS circuit
- Replace the throttle body
- Replace the engine control module (ECM)
How Difficult to Fix:
The difficulty level of fixing a P0122 code can vary depending on the cause of the problem. Replacing the TPS or repairing damaged wiring can be a straightforward process, but replacing the throttle body or ECM can be more challenging.
Can You Drive With This Code:
It is not recommended to drive with a P0122 code as it can lead to reduced engine power, stalling, or other drivability issues.
How to Clear the Code:
To clear the code, you can use an OBD-II scanner or disconnect the battery. However, if disconnecting the battery will reset the relearn of the ECU, please note that doing so may also erase some of your settings.
Tools Need to Use:
- Scan tool or code reader to read and clear the code
- Multimeter to test the TPS circuit
- Socket set to remove and replace parts such as the throttle body
Step-by-Step Diagnostic Procedure:
The following is a step-by-step diagnostic procedure to diagnose and fix a P0122 code:
- Check for any other codes and address them first if applicable
- Visually inspect the TPS and wiring for any obvious damage or corrosion
- Check the TPS circuit with a multimeter to ensure it is within the manufacturer’s specifications
- If the TPS circuit is not within the specifications, replace the TPS
- If the TPS circuit is within the specifications, check the throttle body and ECM for issues
- If the throttle body or ECM is found to be faulty, replace the component
- Clear the code and test drive the vehicle to ensure the issue is resolved
Note: This diagnostic procedure is for informational purposes only and should be done by a qualified technician.
WORDS FROM ERWIN SALARDA
Top 4 most common OBD DTCs for the Toyota Hiace – P0340, P0500, P1220, and P0122. Understand what each code means, its symptoms, causes, and how to fix it.