P0335 Code — Crankshaft Position Sensor A Circuit Malfunction (Causes & How to Fix)

Quick Check – 60‑Second Diagnosis

A flashing check‑engine light paired with a rough idle is often the first clue. With a P0335 code, you can perform a rapid sanity check before pulling out tools:

1. Turn the key to “ON” (engine off). Listen for a faint “click” from the CKP sensor—many sensors generate a small audible pulse when powered.
2. Look at the OBD‑II scanner for any additional codes such as P0325 (CKP sensor B circuit) or P0306 (cylinder‑6 misfire). Multiple codes may point to a wiring harness problem rather than a single sensor.
3. Visually inspect the connector for loose pins or obvious corrosion. If the plug wiggles or the pins are bent, tighten or clean it and clear the code. If the light stays on, move on to the full diagnosis.

Safety Note: Always disconnect the negative battery terminal before removing the sensor to avoid accidental short circuits or shocking the ECM.

Symptoms You’ll Notice While Driving

Understanding the real‑world impact of a bad crankshaft position sensor helps you decide how urgently to act.

| Symptom | Why It Happens | |

Real-World Diagnostic Scenario: P0335

When a technician encounters P0335 in the shop, the diagnostic approach differs significantly from other codes. Unlike generic fuel system codes, P0335 requires checking specific subsystems in a particular order to avoid misdiagnosis. Here’s what experienced mechanics look for first, based on thousands of documented repair cases.

Known Technical Service Bulletins (TSBs) Related to P0335

Several manufacturers have issued TSBs specifically addressing the root causes of P0335. Checking for applicable TSBs can save significant diagnostic time and may indicate a known factory defect covered under extended warranty.

Note: TSB availability varies by manufacturer and model year. Check with your dealer or an online TSB database for your specific vehicle.

Frequently Asked Questions

Q: What is the average repair cost for a P0335 code, and does it vary by vehicle make?

The average repair cost for a P0335 code, which indicates a crankshaft position sensor A circuit malfunction, can range from $100 to $500, depending on the vehicle make and model. For example, a Ford F-150 may require a replacement sensor costing around $200, while a Chevrolet Silverado may need a more complex repair costing upwards of $400. Additionally, labor costs can add another $100 to $200 to the total bill. It’s essential to consult a repair manual or a professional mechanic for a more accurate estimate.

Q: Is it safe to drive with a P0335 code, or can it cause further damage to my engine?

Driving with a P0335 code can be risky, as it may cause your engine to stall or run rough, potentially leading to further damage. However, the code itself is not typically an immediate safety hazard. If you’re experiencing symptoms like stalling or poor engine performance, it’s recommended to have the issue addressed as soon as possible to avoid potential damage to your catalytic converter or other engine components. In most cases, you can drive your vehicle to a repair shop, but it’s crucial to avoid extreme driving conditions.

Q: What is the most common cause of a P0335 code in a Toyota Camry, and how can I prevent it?

In a Toyota Camry, the most common cause of a P0335 code is a faulty crankshaft position sensor, often due to corrosion or wear on the sensor’s electrical connector. To prevent this issue, it’s essential to maintain your vehicle’s electrical system, ensuring all connections are clean and secure. Regularly checking and replacing the spark plugs, as well as the crankshaft position sensor, can also help prevent this code from appearing. Additionally, avoiding extreme temperatures and moisture can help extend the lifespan of the sensor.

Q: Will a P0335 code cause my vehicle to fail an emissions test, and what are the consequences of failing?

A P0335 code can indeed cause your vehicle to fail an emissions test, as the faulty crankshaft position sensor can lead to increased emissions. If your vehicle fails the test, you may be required to repair the issue and retest before you can register or operate your vehicle. In some states, failing an emissions test can result in fines or penalties, so it’s crucial to address the P0335 code promptly to avoid any potential consequences.

Q: How long does it typically take to repair a P0335 code, and can I do it myself?

The repair time for a P0335 code can vary depending on the complexity of the issue and the technician’s experience. On average, a professional mechanic can diagnose and repair the problem within 1-2 hours, depending on the vehicle make and model. While it’s possible to attempt the repair yourself, it’s recommended to consult a professional mechanic, especially if you’re not familiar with the electrical system or diagnostic procedures. A DIY repair can take significantly longer, and there’s a risk of causing further damage if not done correctly.

Q: What’s the difference between a P0335 code and a related code like P0336 or P0337, and how do I know which one I have?

The main difference between a P0335 code and related codes like P0336 or P0337 lies in the specific circuit or sensor malfunction. A P0335 code indicates a circuit malfunction, while a P0336 code may indicate a low circuit voltage, and a P0337 code may indicate a high circuit voltage. To determine which code you have, you’ll need to use an OBD-II scanner to retrieve the specific trouble code stored in your vehicle’s onboard computer. Consult a repair manual or a professional mechanic to understand the exact cause and required repair for your specific code.

Q: Can a P0335 code be caused by a faulty crankshaft or flywheel, and how can I diagnose this?

While a faulty crankshaft or flywheel can cause engine performance issues, it’s unlikely to directly cause a P0335 code. However, a worn or damaged crankshaft or flywheel can cause the crankshaft position sensor to malfunction, leading to a P0335 code. To diagnose this, you’ll need to perform a visual inspection of the crankshaft and flywheel, checking for any signs of wear or damage. You may also need to use specialized tools, such as a dial indicator, to measure the crankshaft’s runout or the flywheel’s surface finish. If you suspect a faulty crankshaft or flywheel, it’s recommended to consult a professional mechanic for further diagnosis and repair.

Q: Are there any specific troubleshooting steps I can take to help diagnose a P0335 code in my Honda Accord?

To help diagnose a P0335 code in your Honda Accord, you can start by checking the crankshaft position sensor’s electrical connector for any signs of corrosion or damage. You can also use a multimeter to measure the sensor’s voltage output, comparing it to the specified value in your repair manual. Additionally, you can try swapping the crankshaft position sensor with a known good sensor to see if the code clears. If the code persists, it may be necessary to use a scan tool to monitor the sensor’s data and perform additional troubleshooting steps, such as checking the sensor’s wiring and circuitry. Consult a repair manual or a professional mechanic for more detailed guidance on troubleshooting a P0335 code in your Honda Accord.

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