Modern cars use many electronic systems to work better. The crankshaft position sensor is very important. It helps check the engine’s speed and timing. If it goes wrong, it can show a P0335 code, meaning a problem with the sensor A circuit.
Knowing why this problem happens is key to fixing it. The crankshaft sensor tells the engine control module about the engine’s speed and position. If it’s not working right, the car might not run well, use more fuel, and could even stall.
To fix the P0335 code, you need to find out why it happened. This might mean looking at the sensor’s electrical circuit, checking the sensor itself, or getting help from a mechanic for crankshaft sensor repair. Fixing it fast can stop more damage and keep the engine running well.
Understanding the P0335 Error Code
When your car shows the P0335 code, it means there’s a problem with the crankshaft position sensor circuit. This code is a generic fault code. It shows that the crankshaft position sensor (CKP) circuit is not working right.
What Does P0335 Mean?
The P0335 code means there’s a problem with the crankshaft position sensor circuit. This sensor watches the crankshaft’s speed and position. It sends important info to the engine control module (ECM) to control fuel and timing.
The Role of the Crankshaft Position Sensor
The crankshaft position sensor is very important for the engine. It helps the ECM know when to fire spark plugs and inject fuel. If it’s not working, the engine might stall, misfire, or have trouble starting.
Common Causes of the P0335 Code
There are a few reasons why the P0335 code might show up. Common causes include a bad crankshaft position sensor, damaged or corroded wiring, and a faulty ECM. The table below shows the possible causes and how likely they are.
| Cause | Likelihood |
|---|---|
| Faulty Crankshaft Position Sensor | High |
| Damaged or Corroded Wiring | Medium |
| Malfunctioning ECM | Low |
Knowing these possible causes helps with fixing the problem.
Symptoms of a P0335 Crankshaft Position Sensor A Circuit Malfunction
Knowing the signs of a P0335 crankshaft position sensor problem is key. This issue can make your car run poorly. It’s important to catch it early.
Engine Performance Issues
A bad crankshaft position sensor can cause your engine to stumble or hesitate. This is because it helps the engine control module (ECM) manage fuel and timing. Without it, your engine might not run right.
You might notice your engine feels weaker or idles roughly. This means the ECM isn’t getting the right info from the sensor.
Starting Problems
Starting your car can be tough if the crankshaft position sensor is faulty. The ECM needs it to know when to spark the plugs. Without it, starting can be a challenge.
In some cases, your car won’t start at all. This is when you need to find out what’s wrong.
Check Engine Light Behavior
The check engine light is a warning sign. If you see a P0335 error, it means there’s a problem with the sensor. The light will tell you something’s wrong.
The light might blink or stay on. It depends on how bad the problem is and your car’s system.
Fuel Economy Effects
A bad crankshaft position sensor can also hurt your car’s fuel efficiency. If the sensor fails, the ECM might not inject fuel correctly. This means you’ll use more fuel and spend more money.
It also means your car will pollute more. This can cause more problems for your vehicle.
Tools Needed for Diagnosis and Repair
To fix the crankshaft position sensor A circuit problem, you need the right tools. You’ll need diagnostic tools, basic hand tools, and safety gear. This helps you find and fix the problem well.
Diagnostic Equipment
An OBD-II scanner is key for finding the P0335 error code’s cause. It lets you read and clear codes and watch the sensor’s work. Advanced scanners show more about the sensor’s signals, helping you figure out what’s wrong.
Basic Hand Tools
You’ll need basic tools to get to and swap the crankshaft position sensor. You’ll need socket sets, wrenches, and pliers. It’s important to use the right tool size and type to avoid damage.
Safety Equipment
Always wear protective gloves and safety glasses when working under the hood. This keeps you safe from sharp edges, electrical shocks, or spills.
Replacement Parts Considerations
When you replace the sensor, choose a part that fits the vehicle’s specs. High-quality replacement parts work better and last longer. Check the service manual or talk to parts suppliers for the right part.
| Tool Type | Description | Usage |
|---|---|---|
| OBD-II Scanner | Reads and clears trouble codes, monitors sensor performance | Diagnostic |
| Socket Set | Variety of sockets for different bolts and nuts | Removal and installation |
| Protective Gloves | Protects hands from cuts, abrasions, and electrical shock | Safety |
Locating the Crankshaft Position Sensor
Knowing where the crankshaft position sensor is can help a lot. It’s in different spots in different cars. So, it’s key to know where it is in your car.
Common Locations in American Vehicles
In many American cars, the sensor is near the crankshaft. It might be at the front or back of the engine. For example, in some Ford cars, it’s by the harmonic balancer. In General Motors cars, it’s near the crankshaft pulley.
European and Asian Vehicle Differences
European and Asian cars have the sensor in different spots. Some BMWs have it in the timing cover. Toyota cars might have it near the crankshaft sprocket. Always check your car’s manual for exact info.
Accessing the Sensor Safely
When you get to the sensor, be careful. Make sure the engine is cool. Also, turn off the battery to avoid any surprises. Use the right tools to avoid damage.
Using Service Manuals Effectively
Service manuals are super helpful. They have diagrams and steps for finding and fixing the sensor. They’re great for DIY car fixes and tell you what your car needs.
| Vehicle Type | Common Location | Access Difficulty |
|---|---|---|
| American | Near crankshaft or harmonic balancer | Moderate |
| European | Integrated into timing cover or near crankshaft sprocket | High |
| Asian | Near crankshaft pulley or sprocket | Moderate to High |
Diagnosing the P0335 Crankshaft Position Sensor A Circuit Malfunction
To find the problem with the P0335 code, we need to follow a few steps. We use tools and methods to find the main cause.
Using an OBD-II Scanner
The first thing is to use an OBD-II scanner. It reads the error code and other codes in the car’s computer. This tells us what’s wrong and why.
Visual Inspection Techniques
Next, we do a visual inspection of the sensor and its wires. We look for damage, wear, or rust that might be causing the problem.
Testing the Sensor Circuit
Then, we test the circuit of the sensor. We use a multimeter for this.
Resistance Testing
For resistance testing, we remove the sensor connector. Then, we measure the resistance between the terminals. We compare this to what the maker says it should be.
Voltage Testing
For voltage testing, we put the connector back on. We measure the voltage between the terminals while the engine is running. Again, we compare it to the maker’s specs.
| Test Type | Expected Reading | Actual Reading |
|---|---|---|
| Resistance Testing | As per manufacturer’s specs | Measure using multimeter |
| Voltage Testing | As per manufacturer’s specs | Measure using multimeter |
Analyzing Sensor Signal Patterns
Looking at the sensor signal patterns helps us understand how the sensor works. We use a scan tool or oscilloscope for this.
By following these steps and using the right tools, we can find and fix the P0335 crankshaft position sensor A circuit malfunction.
Step-by-Step Sensor Replacement Guide
Replacing the crankshaft position sensor is key to fixing the P0335 error code. This process has several important steps. You must follow them carefully for a good repair.
Preparing Your Vehicle
Before you start, get your vehicle ready. This means:
- Make sure the engine is cool
- Unhook the negative battery cable to stop the engine from starting by accident
- Get all the tools and parts you need
Always check your vehicle’s service manual for exact instructions and safety tips.
Removing the Old Sensor
To take out the old sensor, do this:
- Find the sensor, usually near the crankshaft or engine block
- Unplug the electrical connector
- Remove any bolts or clips that hold the sensor
- Slowly pull the sensor out of its spot
Installing the New Sensor
When putting in the new sensor, make sure it fits right and is secure:
- Put the new sensor in its spot
- Push it in gently
- Put back any bolts or clips
- Plug in the electrical connector
Post-Installation Checks
After putting in the new sensor, do these checks:
- Make sure the sensor is tight
- Look for any damage or wear on the electrical connection
- Use an OBD-II scanner to clear any trouble codes
- Start the engine to check if it runs well
Common Installation Mistakes to Avoid
To avoid problems, watch out for these common mistakes:
- Not aligning the new sensor right
- Not securing the sensor well
- Damaging the electrical connector or wiring
- Not clearing trouble codes after fixing
By following these steps and avoiding common mistakes, you can replace your crankshaft position sensor right. This will fix the P0335 error code.
Wiring and Connector Repairs
To fix the P0335 code, check the wiring and connectors of the crankshaft position sensor. Look for damage or wear. The wiring and connectors must be in good shape for the sensor to work right.
Identifying Wiring Issues
Wiring problems can include cuts, abrasions, corrosion, or damage from rodents. It’s important to check the wiring harness carefully. Look for any wear or damage, mainly where the wiring is exposed or near other parts.
Repairing Damaged Connectors
Bad connectors can stop the crankshaft position sensor from working. Fixing or replacing these connectors is key. Make sure any new connectors match the quality and type of the old ones.
Securing and Protecting the Wiring Harness
After fixing any wiring or connectors, secure the wiring harness well. Use cable ties or clips to keep it in place, away from heat and moving parts. This helps avoid future problems.
Testing Circuit Continuity
Testing circuit continuity is crucial after repairs. Use a multimeter to check if there’s a connection between the sensor and the engine control module. This confirms that the repairs fixed any circuit problems.
| Test | Purpose | Expected Outcome |
|---|---|---|
| Circuit Continuity Test | To verify that the wiring and connectors are functioning correctly | Continuity between the sensor and ECM |
| Voltage Test | To check the voltage supply to the sensor | Voltage within the specified range |
| Signal Test | To verify the sensor’s signal output | A clean, consistent signal pattern |
Vehicle-Specific Troubleshooting Tips
When fixing a P0335 code, knowing your car’s model is key. Each car acts differently and needs its own fix.
Domestic Truck and SUV Considerations
Trucks and SUVs often face wiring and sensor issues. Look for damage or misalignment in wiring and sensor mounts.
- Check for rust or corrosion on wiring and connectors
- Verify the sensor is properly secured and aligned
- Consult a repair manual for specific guidance on accessing the crankshaft position sensor
Common Issues in Popular Sedan Models
Sedans might have electrical problems with the crankshaft sensor. Look for faulty relays, blown fuses, or damaged wiring. A multimeter can help find the problem.
- Test the voltage supply to the crankshaft position sensor
- Inspect the wiring for any signs of damage or wear
- Check the relay and fuse associated with the sensor circuit
European Vehicle Special Procedures
European cars need special tools and steps. Always check the service manual or use a specific diagnostic tool for accurate fixes.
Using manufacturer-specific diagnostic tools can significantly streamline the troubleshooting process.
When to Use Manufacturer-Specific Diagnostic Tools
For complex cars, use special tools. They give detailed info on the engine system and find the P0335 error’s cause.
When to Seek Professional Help
The P0335 crankshaft position sensor A circuit malfunction can be hard for DIY fans. It needs a skilled tech. Some car repairs are too tricky for home fixes. They need a pro to fix right.
Signs the Problem Is Beyond DIY Repair
Look out for these signs to know when to call a pro:
- Intermittent engine stalling that keeps happening after fixing the sensor.
- Check Engine Light that flashes or stays on, showing a bigger problem.
- Strange sounds from the engine or crankshaft that are hard to figure out.
Estimating Professional Repair Costs
Fixing the P0335 error costs vary. It depends on labor and parts. Expect to pay $200 to $500 for fixing it.
Choosing a Qualified Mechanic
Find a good mechanic by looking at:
- Certifications from trusted groups like ASE.
- Experience with your car’s type.
- Good reviews and ratings from others.
Questions to Ask Your Technician
Ask your tech these questions for the best service:
- What’s causing the P0335 error in my car?
- What fixes do I need for this problem?
- Are there more repairs or upkeep I should know about?
Knowing when to get help ensures your car is fixed right. If you’re not sure, always ask a pro.
Conclusion
Fixing the P0335 crankshaft position sensor A circuit malfunction is important. You need to know how the sensor works and why it might fail. This article shows you how to find and fix problems with the crankshaft position sensor.
Having trouble with your engine or car starting? A P0335 error code might be the reason. To solve this, you must diagnose the issue carefully. Use the right tools, check the sensor and circuit, and fix or replace what’s needed.
Learning how to fix the crankshaft position sensor helps your car run better. Regular checks and quick fixes can stop bigger problems. This saves you time and money in the future.
FAQ
What does the P0335 error code signify?
The P0335 error code means there’s a problem with the crankshaft position sensor A circuit. This could be with the sensor itself or its wiring.
How does the crankshaft position sensor affect engine performance?
The crankshaft position sensor is key for the engine. It helps the engine control unit (ECU) manage fuel and timing. A bad sensor can cause the engine to run poorly, like idling rough or stalling.
What are the common causes of a P0335 crankshaft position sensor A circuit malfunction?
Issues can include a bad sensor, damaged wiring, or dirty connections. Problems with the sensor’s ring or wheel can also cause trouble.
Can a P0335 error code be caused by a problem other than the crankshaft position sensor?
Yes, other problems can cause this error. These include issues with the ECU, wiring, or the ignition system.
How do I diagnose a P0335 crankshaft position sensor A circuit malfunction?
First, use an OBD-II scanner to get the error code. Then, do a visual check and test the sensor circuit. Look at the sensor signal patterns too.
What tools are required to replace a crankshaft position sensor?
You’ll need basic tools like wrenches and pliers. Also, a service manual is helpful for the replacement process.
Can I replace the crankshaft position sensor myself?
Yes, you can do it yourself with the right tools and a service manual. But, be careful not to make mistakes during installation.
How do I know if the crankshaft position sensor replacement has fixed the issue?
After replacing the sensor, use an OBD-II scanner to clear the error code. Then, drive the vehicle to see if the problem is fixed.
Are there any vehicle-specific considerations when troubleshooting a P0335 error code?
Yes, different cars may need special steps for diagnosing and fixing the crankshaft position sensor circuit.
When should I seek professional help for a P0335 crankshaft position sensor A circuit malfunction?
If you’re not sure about fixing the problem or if it keeps happening, get help from a mechanic.