DIY Guide: Replacing the Crankshaft Position Sensor A to Fix P0335 Code in a Chrysler 300

By Nick Marchenko, PhD

Welcome to another mechanical escapade, where today's challenge involves tackling the somewhat perplexing P0335 code - a crankshaft position sensor "A" circuit malfunction on a 2015 Chrysler 300. Armed with nothing but our wit, a Bluetooth OBD2 scanner, and a smattering of tools, we're embarking on a DIY journey to replace this critical sensor. Trust me, it's a venture that promises both frustration and enlightenment in equal measure.

Understanding the Beast

The crankshaft position sensor, a vital component of your vehicle's engine management system, essentially tells your car's computer (PCM) the position of the crankshaft. This data is crucial for things like fuel injection and ignition timing. So, when it goes on the fritz, as indicated by the P0335 code, it can lead to symptoms like rough starting or, in more dramatic cases, the engine not starting at all.

Tools of the Trade

Before diving under the hood, let's gather our arsenal. You will need:

• A Bluetooth OBD2 scanner for code reading
• A 10mm wrench or socket
• A screwdriver
• A new crankshaft position sensor (obviously)
• A dash of patience and perhaps a spot of tea (the latter is optional but recommended)

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The Preliminary Round

Our adventure begins with the diagnostic dance - connecting the OBD2 scanner and interpreting the cryptic hieroglyphs that are diagnostic trouble codes. In our case, the scanner threw up a P0335, pointing squarely to the crankshaft position sensor's circuitry being out of sorts. It's a moment of triumph, tinged with the realization that the real work is yet to begin.

Getting to the Crux

The crankshaft position sensor is nestled in a location that suggests the engineers wanted it to be neither seen nor disturbed. Accessing this automotive introvert requires raising the vehicle and removing the splash shield for a proper introduction. Here, a step-by-step approach is warranted:

1. Raise the vehicle safely using jack stands. Always prioritize safety.
2. Remove the splash shield to unveil the sensor's hiding place.
3. Locate the sensor on the left side (passenger side if you're in the States) of the engine, near the rear.

The Extraction

With the sensor in sight, the next steps involve some delicate finger work:

1. Disengage the electrical connector by pressing and releasing the safety lock.
2. Unscrew the bolt holding the sensor in place using the 10mm wrench or socket.
3. Gently coax the sensor from its lodging. If it resists, a gentle persuasion is key - avoid any temptation to yank it out with brute force.

The Heart of the Operation

Installation of the new sensor mirrors the removal process, but with a twist - lubrication. A dab of oil on the sensor's O-ring ensures a smooth entry. Remember, the goal is snug, not tight. Overzealous tightening could lead to an untimely demise of the new sensor.

Clearing the Air

With the new sensor in place, the final act involves clearing the P0335 code from the PCM's memory. This is where our trusty OBD2 scanner comes back into play, performing the electronic equivalent of a reset button. It's a simple process that tells your Chrysler 300 to forget its past troubles and embrace a future of error-free operation.

Final Thoughts

The road to DIY success is paved with the satisfaction of having tackled the problem head-on, armed with nothing but a set of tools and a dash of courage. As the engine purrs to life, free from the hesitation that once plagued it, there's a moment of pure, unadulterated joy. It's a reminder that, in the world of automotive repair, the journey is just as important as the destination.

For those thirsting for more DIY adventures, consider exploring our guide on replacing the engine oil and filter, or perhaps you'd fancy a step-by-step journey through headlight assembly replacement. And for the truly brave, why not delve into the intricacies of engine swap compatibility? The world of DIY automotive repair is vast and full of potential.

Nick Marchenko, PhD

Industrial Engineer & Automotive Content Specialist

Nick writes in-depth guides on car clubs, engine specs, vehicle ownership, and modifications, combining engineering knowledge with automotive passion.

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