OBD2 Code P0335: Toyota Highlander Crankshaft Position Sensor Troubleshooting

The dreaded P0335 OBD2 code. If you own a Toyota Highlander, seeing this code pop up on your OBD2 scanner can be unsettling. This code signifies a problem with the crankshaft position sensor (CKP) circuit, a vital component for your engine’s operation. This article will delve into the P0335 code specifically for the Toyota Highlander, providing comprehensive information about its causes, symptoms, diagnostic procedures, and solutions.

Understanding the OBD2 Code P0335 in Toyota Highlander

The P0335 code specifically indicates a malfunction within the crankshaft position sensor “A” circuit. This sensor plays a crucial role in determining the engine’s speed and crankshaft position, information that the Engine Control Unit (ECU) uses to manage fuel injection and ignition timing. A faulty CKP sensor can lead to a range of drivability problems, and in some cases, prevent the engine from starting altogether.

Symptoms of a P0335 Code in Your Toyota Highlander

Recognizing the symptoms associated with the P0335 code can help you diagnose the problem quickly. These symptoms can vary in severity, but some common indicators include:

Check Engine Light illuminated: This is the most obvious sign.
Engine stalling or difficulty starting: The ECU struggles to manage engine functions without accurate crankshaft position data.
Rough idling or misfiring: Incorrect ignition timing can cause the engine to run unevenly.
Reduced fuel economy: The engine may run rich or lean due to improper fuel injection control.
Lack of power or acceleration: The engine’s performance can be significantly affected.

Common Causes of the P0335 Code in a Toyota Highlander

Several factors can contribute to a P0335 code in your Toyota Highlander. These include:

Faulty Crankshaft Position Sensor: The sensor itself may be damaged or worn out.
Wiring Problems: Damaged, corroded, or loose wiring in the sensor circuit can disrupt the signal.
Connector Issues: A loose or corroded connector can prevent proper communication between the sensor and the ECU.
Damaged Reluctor Ring: This ring, attached to the crankshaft, provides the position information to the sensor. Damage to this ring can cause inaccurate readings.
ECU Problems: While less common, a faulty ECU can also contribute to this code.

Toyota Highlander Crankshaft Position Sensor Location

Diagnosing the P0335 Code

Diagnosing the P0335 code requires a systematic approach. Here’s a step-by-step guide:

Retrieve the Code: Use an OBD2 scanner to confirm the P0335 code and check for any other related codes.
Visual Inspection: Inspect the wiring and connector for any visible damage, corrosion, or looseness.
Check the Sensor: Use a multimeter to test the sensor’s resistance and voltage according to the manufacturer’s specifications.
Inspect the Reluctor Ring: Visually inspect the reluctor ring for any signs of damage or debris.
Check the Wiring Harness: Test the continuity of the wiring harness between the sensor and the ECU.

Fixing the P0335 Code

Once you’ve identified the cause of the P0335 code, you can proceed with the appropriate repair. This may involve:

Replacing the Crankshaft Position Sensor: This is the most common solution.
Repairing the Wiring or Connector: Replacing damaged wires or cleaning corroded connectors can restore proper function.
Replacing the Reluctor Ring: If the reluctor ring is damaged, it needs to be replaced.
Addressing ECU Issues: If the ECU is faulty, it may require reprogramming or replacement.

Conclusion

The P0335 code in your Toyota Highlander indicates a problem with the crankshaft position sensor circuit. Addressing this issue promptly is crucial to avoid further drivability problems and potential engine damage. By understanding the causes, symptoms, and diagnostic procedures, you can effectively troubleshoot and resolve the P0335 code, ensuring your Highlander runs smoothly. Remember, regular maintenance and timely repairs are essential for keeping your vehicle in optimal condition.

FAQ

Can I drive my Toyota Highlander with a P0335 code? It’s not recommended. Driving with a faulty CKP sensor can lead to further engine problems.
How much does it cost to replace a crankshaft position sensor? The cost varies depending on the model year and labor costs, but it typically ranges from $150 to $300.
Where is the crankshaft position sensor located on a Toyota Highlander? It’s usually located near the crankshaft pulley at the front of the engine.
What tools do I need to replace the crankshaft position sensor? Basic hand tools like sockets, wrenches, and a multimeter are usually sufficient.
Can a bad battery cause a P0335 code? While unlikely, a severely discharged battery can sometimes cause erratic sensor readings.
How often should I replace the crankshaft position sensor? There’s no set replacement interval, but it’s a good idea to inspect it during routine maintenance.
Can I replace the crankshaft position sensor myself? Yes, with basic mechanical skills and the right tools, it’s a relatively straightforward job.

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