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Engine-Codes – Subaru – P0335 Subaru

P0335 Subaru Code - Crankshaft Position Sensor 'A' Circuit Signal Fault

Quick Answer

The P0335 code for Subaru vehicles indicates a problem with the crankshaft position sensor 'A' circuit signal. Common causes include Faulty crankshaft position sensor, Damaged or corroded wiring/connectors in the sensor circuit, Issues with the ECM. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P0335 Subaru indicates Crankshaft Position Sensor 'A' Circuit Signal Fault.
Common causes
Common causes include Faulty crankshaft position sensor, Damaged or corroded wiring/connectors in the sensor circuit, Issues with the ECM.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Aug 30, 2024
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Code P0335 Subaru Description

The P0335 code for Subaru vehicles indicates a problem with the crankshaft position sensor 'A' circuit signal. The crankshaft position sensor is a vital component that monitors the position and rotational speed of the crankshaft in the engine. This information is crucial for the engine control module (ECM) to accurately determine ignition timing and fuel injection timing. A fault in the crankshaft position sensor circuit signal can lead to incorrect engine timing, misfires, and poor performance. If left unaddressed, it can potentially cause engine stalling, rough idling, and even engine damage.

OBDII Code P0335 Subaru - Crankshaft Position Sensor 'A' Circuit Signal Fault
P0335 Subaru Code - Crankshaft Position Sensor 'A' Circuit Signal Fault

Common Causes of P0335 Subaru

  1. Faulty crankshaft position sensor
  2. Damaged or corroded wiring/connectors in the sensor circuit
  3. Issues with the ECM
  4. Incorrect sensor installation
  5. Engine timing belt or chain problems

Symptoms of P0335 Subaru

  1. Engine misfires
  2. Difficulty starting the engine
  3. Rough idling or stalling
  4. Reduced fuel efficiency
  5. Illumination of the check engine light

How to Fix P0335 Subaru

  1. Diagnose the issue by using a scan tool to confirm the P0335 code and check the sensor's signal.
  2. Inspect the wiring and connectors for any damage, corrosion, or loose connections.
  3. Replace the crankshaft position sensor if it is faulty.
  4. Clear the code and reset the ECM to see if the issue persists.
  5. Test drive the vehicle to ensure the problem has been resolved.

Cost to Fix P0335 Subaru

The cost of repairing a P0335 code on a Subaru can range from $100 to $300, depending on the specific cause of the issue and the cost of parts and labor in your area. Keep in mind that diagnostic time and labor rates can vary, so it's advisable to get quotes from multiple auto repair shops to find the best price.

What does this mean?

Tech Notes for P0335 Subaru

Sometimes and in some models, low battery voltage or a weak starter can trigger a Crankshaft Position Sensor code. Before replacing any parts, recharge or replaced battery.

When is the Code Detected?

The crankshaft position sensor (POS) signal is not detected by the Electronic Control Module (ECM) during the first few seconds of engine cranking

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0335 Subaru Code

1. What are common symptoms of OBDII code P0335 in a Subaru related to the Crankshaft Position Sensor 'A' circuit signal fault?

- Common symptoms include engine stalling, rough idling, difficulty starting the engine, and a decrease in overall engine performance.

2. What are the typical causes of OBDII code P0335 in a Subaru?

- The code is often triggered by a faulty crankshaft position sensor, damaged wiring or connectors related to the sensor, or issues with the sensor's signal circuit.

3. How can I diagnose the cause of OBDII code P0335 in my Subaru?

- To diagnose the issue, you can use a diagnostic scan tool to read the code, visually inspect the wiring and connectors of the crankshaft position sensor, and perform testing on the sensor's signal output.

4. Can a faulty crankshaft position sensor cause other problems besides triggering OBDII code P0335 in a Subaru?

- Yes, a faulty crankshaft position sensor can lead to a range of issues including misfires, poor fuel efficiency, and potential damage to the engine if left unresolved.

5. Is it safe to continue driving my Subaru with OBDII code P0335 present?

- It is not recommended to drive your Subaru with this code present, as it can lead to further engine damage and potential safety hazards due to the associated symptoms.

6. How can I repair OBDII code P0335 in my Subaru?

- Repairing the code typically involves replacing the faulty crankshaft position sensor, repairing any damaged wiring or connectors, and clearing the code with a diagnostic scan tool.

7. Are there any preventative measures to avoid OBDII code P0335 in a Subaru?

- Regular maintenance, such as checking and replacing sensors at recommended intervals, can help prevent issues like OBDII code P0335 related to the crankshaft position sensor.

8. Can weather conditions or environmental factors affect OBDII code P0335 in a Subaru?

- Extreme temperatures or moisture can potentially impact the performance of the crankshaft position sensor and lead to the triggering of OBDII code P0335.

9. How long does it typically take to repair OBDII code P0335 in a Subaru?

- The repair time can vary depending on the exact cause of the code, but it generally takes a few hours to diagnose and replace the faulty components.

10. Should I attempt to repair OBDII code P0335 in my Subaru myself or seek professional help?

- While some may have the skills to diagnose and repair the issue themselves, it is recommended to seek professional help, especially if you are unsure about the diagnostic process or lack experience with automotive repairs.

Discuss the causes and fixes for P0335 Subaru OBDII Code

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  • My vehicle Subaru impreza fuel consumption had of late gone slightly high plus loss of power(vehicle felt a bit heavy)There was no check engine light but i just decided 2 connect the elm diagnostic just to be sure and voila there was a code showing p0335!,
    Looking at the causes i remembered i had a dead battery about a month ago that i replaced with new one. I will now drive and compare the consumption

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