Summary
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Diagnostic trouble code (DTC) P0335 stands for “Crankshaft Position “A” Circuit Malfunction.”
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The powertrain control module will log P0335 when the PCM can’t detect any signal from the crankshaft position sensor.
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Common causes of the P0335 code are a bad crankshaft position sensor, failed reluctor ring, circuit issues, and PCM problems.
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A vehicle that sets the P0335 code can show symptoms like an illuminated check engine light, stalling, hard starts, and misfires.
If your check engine light has come on and you've scanned the vehicle to find Diagnostic Trouble Code (DTC) P0335, you're dealing with a "Crankshaft Position Sensor A Circuit Malfunction." This is a common code in many modern vehicles and can lead to a variety of engine performance issues if not addressed promptly.
What Does Code P0335 Mean?
The P0335 code refers to a problem with the crankshaft position sensor (CKP) or its circuit. This sensor plays a crucial role in engine timing by monitoring the position and rotational speed of the crankshaft. The Powertrain Control Module (PCM) uses this information to manage ignition timing and fuel injection.
When the PCM cannot detect a proper signal from the sensor, it triggers P0335.
Common Symptoms of Code P0335
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No-start condition or engine stalls intermittently
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Check engine light illuminated
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Engine misfiring or rough idling
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Poor fuel economy
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Reduced acceleration or power
These symptoms can vary depending on your vehicle make and model, but they all point to an issue in the crankshaft position sensor circuit.
What Causes P0335?
Several factors can trigger this code:
Faulty Crankshaft Position Sensor
Worn or damaged sensors fail to send accurate signals to the PCM.
Damaged Wiring/Circuit Issues
Poor connections, frayed wires, or corrosion disrupt signal transmission.
Timing Chain/Belt Problems
Stretched or misaligned timing components affect sensor readings.
Malfunctioning PCM
Rare, but a faulty powertrain control module may misinterpret signals.
Corroded Sensor Harness
Water damage or corrosion in connectors breaks the electrical circuit.
How to Diagnose and Fix Code P0335
A professional-grade scan tool is essential to accurately diagnose and clear this code. That’s where iCarsoft CR Ultra comes in.
Steps for Diagnosis Using iCarsoft CR Ultra:
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Connect the CR Ultra to your vehicle’s OBD-II port.
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Scan for stored codes and note any related codes (like P0336 or P0016).
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Go to Live Data and monitor crankshaft sensor output.
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Inspect the sensor connector and wiring for damage or corrosion.
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Use CR Ultra to perform circuit tests or component activation if supported.
Pro Tip: The iCarsoft CR Ultra is an advanced OBD2 tool for crankshaft code P0335 and many other diagnostic issues. It supports real-time sensor monitoring, which helps verify whether the crankshaft position sensor is sending valid signals.
Is It Safe to Drive with Code P0335?
Driving with this code is not recommended. A faulty crankshaft position sensor may cause sudden engine stall, particularly at low speeds or idle. If you notice drivability issues or difficulty starting the engine, address the problem immediately.
Preventing P0335 in the Future
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Regularly inspect wiring harnesses for wear or rodent damage
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Ensure connectors are secure after maintenance
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Replace crankshaft sensors at OEM-recommended intervals
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Use a reliable diagnostic tool to catch early warning signs
Recommended Tool: iCarsoft CR Ultra
The iCarsoft CR Ultra is an all-in-one automotive diagnostic scanner for professional and DIY use. It supports over 40 brands and offers full system diagnostics, live data, and ECU coding functions.
Why Choose CR Ultra?
Full OBD-II Support
Comprehensive diagnostics for P0335 and related codes.
Multi-System Scanning
Read/clear codes from engine, transmission, ABS, and more.
Live Data Analysis
Monitor real-time crankshaft sensor signals for accurate troubleshooting.
User-Friendly Design
Intuitive touchscreen interface for easy operation by DIYers and pros.
Final Thoughts
The P0335 code might sound technical, but with the right tools and understanding, it can be addressed before causing serious engine damage. If you're experiencing engine starting issues, stalling, or poor performance, don’t wait—scan your vehicle today.
With tools like the iCarsoft CR Ultra, diagnosing and fixing problems like a crankshaft position sensor malfunction becomes faster, more accurate, and more cost-effective.
Tags:
P0335 code fix, crankshaft position sensor not working, iCarsoft CR Ultra scanner, engine no start OBD2 tool, crankshaft sensor diagnostic tool, full system automotive scanner
