Oil on Camshaft Position Sensor: Causes and Tips 2024

Oil on the camshaft position sensor sparked my curiosity, leading me to research this common automotive issue. I discovered it affects engine performance more than most realize. Exploring solutions, I found both simple fixes and deeper mechanical insights. Sharing these findings feels like unravelling a mystery that many car owners … Read more

Photo of author

Written by: Mohammad Sameer

Published on:

Oil on the camshaft position sensor sparked my curiosity, leading me to research this common automotive issue. I discovered it affects engine performance more than most realize.

Exploring solutions, I found both simple fixes and deeper mechanical insights. Sharing these findings feels like unravelling a mystery that many car owners face.

Join me in demystifying this topic and enhancing our vehicles’ health.

Table of Contents

Key Takeaways

  • Diagnostic Trouble Codes P1137 and P1345 indicate issues with the oxygen sensor and the Camshaft Position Solenoid Valve, respectively, which can be influenced by oil quality and engine maintenance.
  • Proper installation and break-in procedures, including the use of assembly lube and oil booster, are crucial for protecting the camshaft and ensuring sensor reliability.
  • The Throttle Position Sensor is integral to engine management, and its performance can be affected by oil contaminants and electrical connection issues.
  • Choosing the right oil viscosity, maintaining cleanliness, and ensuring the correct oil level is essential for optimal Camshaft Position Sensor and Variable Valve Timing (VVT) solenoid operation.
  • Regular maintenance, including timely oil and filter changes with quality products, is key to preventing sensor malfunctions and maintaining engine health.

Oil on Camshaft Position Sensor: Understanding P1137 and P1345

Deciphering the Codes: Understanding P1137 and P1345

The Role of Diagnostic Trouble Codes in Engine Performance

When I’m under the hood, I know that diagnostic trouble codes (DTCs) are more than just cryptic messages; they’re the key to unlocking the mysteries of my engine’s performance. Think of them as the engine’s way of saying, “Hey, I need a bit of attention here!” For instance, when the check engine light pops up, it’s not just a suggestion to peek at the engine—it’s a directive to dive deep and diagnose the issue.

Maintaining a safe distance from engine problems means addressing those warnings promptly. I use my trusty diagnostic tools to interpret trouble codes, ensuring efficient repairs post-check engine light alert. Quality repairs by skilled technicians are my go-to to prevent recurring issues.

Here’s a simple guide I follow when that pesky light comes on:

  1. Scan the codes using a reliable OBD-II scanner.
  2. Determine the severity of the issue—some codes are more urgent than others.
  3. Inspect the related components thoroughly.
  4. Repair or replace parts as necessary.
  5. Retest to make sure the issue is resolved.

Remember, common causes of inspection failure can include something as simple as lighting malfunctions, so never overlook the small stuff. And when it comes to diesel engines, I proactively monitor and address codes to prevent major failures. Regular tune-ups and thorough inspections are my secret weapons to clear and prevent engine derates effectively.

Interpreting P1137: Oxygen Sensor and Wiring Considerations

When I first encountered the P1137 code, I knew it was crucial to focus on the downstream Oxygen Sensor’s wiring. A common culprit is a wire grounding out, which can wreak havoc on sensor readings.

It’s essential to inspect the wiring thoroughly, ensuring no wires are in contact with the exhaust or other metal components. The wires should be neatly secured, sometimes within a protective plastic tube, to prevent any potential damage.

If the wiring inspection doesn’t reveal any issues, the next step might be to consider replacing the oxygen sensor itself.

But before jumping to conclusions, it’s important to gather more information about the vehicle, such as its maintenance history and any recent changes or symptoms.

Here’s a quick checklist to follow when dealing with a P1137 code:

  • Inspect the wiring for signs of wear or grounding.
  • Secure the wiring away from hot or moving parts.
  • Check the oxygen sensor’s electrical connections.
  • Evaluate the vehicle’s maintenance history for related issues.

Remember, a P1137 code can be misleading. It might not just be the sensor that’s at fault but the wiring leading to it. Always double-check the connections and the state of the wires before making any replacements.

Addressing P1345: Camshaft Position Solenoid Valve Troubleshooting

When I first encountered the P1345 code, it was clear that the issue wasn’t with the camshaft itself but rather with the Camshaft Position Solenoid Valve, also known as the VVT solenoid. This distinction is crucial because it changes the troubleshooting approach entirely.

I’ve learned that a common culprit can be a damaged connector, especially if there’s been a recent incident with the serpentine belt. But it’s not just about the physical connections; the wiring to the VVT solenoid, the engine oil level, and even the cleanliness of the solenoid’s screens can all play a part. Here’s a quick checklist I put together based on my experience and some helpful snippets I found online:

  • Recheck all connections after any work around the fuse box
  • Inspect the wiring to the VVT solenoid for damage
  • Ensure the engine oil level is adequate
  • Clean the VVT solenoid screens of any debris

Remember, a thorough inspection can save you from chasing ghosts. It’s easy to assume the worst, but sometimes the fix is as simple as clearing a clogged screen or topping up the oil.

If you’re feeling up to it, replacing the VVT solenoid can be a DIY job. Just make sure to inspect the old solenoid carefully when you remove it, looking out for any parts that might have been left behind, like the o-ring screen. And always, always double-check for debris before installing the new solenoid.

Preventive Measures: Protecting Your Camshaft During Installation

Preventive Measures: Protecting Your Camshaft During Installation

The Importance of Assembly Lube and Oil Booster

When I’m putting together an engine, I always reach for a quality assembly lube and oil booster. Why? Because they’re essential for protecting the camshaft and other moving parts during those first critical moments of operation.

Regular oil changes are crucial for engine health, performance, and longevity. It’s not just about keeping things running smoothly; it’s about safeguarding the investment you’ve made in your vehicle.

Why is my camshaft leaking oil? This question often plagues car enthusiasts and mechanics alike. The answer usually lies in the details of installation and maintenance.

How does oil get into camshaft? It’s introduced during assembly and circulates under pressure once the engine runs. Ensuring that every component is well-lubricated from the start can prevent many issues down the line.

Here’s a quick checklist to ensure you’re on the right track:

  • Use high-quality certified engine oils
  • Apply a proper assembly lubricant, like STP oil treatment
  • Adjust valve spring pressure accurately
  • Prime the oiling system thoroughly

Remember, the best answer is to use only high-quality certified engine oils meeting performance standards. This, along with the right assembly lube, can make all the difference.

And if you’re wondering about additives, Prolong Super Lubricants is a top choice for addressing issues like a slipping transmission, which speaks volumes about its protective qualities for engine parts as well.

Adjusting Valve Spring Pressure and Priming the Oiling System

When I’m setting up the valve springs, I always keep in mind that the pressure needs to be just right. Too much pressure can lead to excessive wear, and not enough might cause valve float at high RPMs.

Adjusting valve spring pressure is a delicate balance, but it’s crucial for the health of the camshaft and the overall engine performance. After getting the springs dialed in, I move on to priming the oiling system.

This step ensures that every part of the engine, especially the camshaft, is well-lubricated before the first ignition.

Priming the oiling system isn’t just about pouring oil into the engine and calling it a day. It’s about making sure that the oil pump is actively circulating oil throughout the engine.

This includes the lower connecting rod bearings, rocker arms, and bushings, valve stems, and of course, the valve springs. Here’s a quick rundown of the steps I follow:

  1. Fill the engine with the appropriate oil.
  2. Rotate the oil pump shaft manually or with a drill to circulate the oil.
  3. Check for any signs of leaks or blockages.
  4. Ensure that oil reaches all critical components.

Remember, a well-primed oiling system is the lifeline of your engine. It’s what keeps everything running smoothly from the get-go.

I also pay attention to the oil-life monitoring systems in modern vehicles. These systems analyze operational conditions to ensure timely oil changes, which is essential for maintaining environmental responsibility and peak engine performance. It’s always best to follow the manufacturer’s guidelines to keep the engine in top shape.

The Break-in Process: Running the Engine at Optimal RPMs

After meticulously assembling the engine with the right lube and oil booster, it’s time to focus on the break-in process.

Always warm up the engine before pushing it to higher RPMs. I’ve learned that varying the throttle and RPM during the first several hundred miles is crucial.

It’s not just about hitting a certain number; it’s about the quality of the run-in.

  • Warm up the engine thoroughly.
  • Run the engine at 2000-2500 RPM for 20-30 minutes.
  • Vary the RPMs to ensure good oil distribution.
  • Avoid aggressive driving behaviours like launch, WOT, or redlining during the initial phase.

Remember, patience during the break-in can save you from headaches down the road. The sustained RPM not only ensures good oil splash around the valvetrain but also heats up the engine uniformly, which is vital for the cam break-in.

Following these steps helps protect the engine from premature wear and potential damage. It’s a practice I’ve seen emphasized across various forums and guides, including the sage advice from ‘Bob The Oil Guy’ on the importance of this initial run.

A Key Player in Engine Management

How the Throttle Position Sensor Influences Air Intake

When I press down on the gas pedal, it’s the throttle position sensor (TPS) that plays a pivotal role in determining how much air flows into my engine.

It’s like the sensor is having a constant conversation with the engine’s computer, the PCM, to ensure that the air-to-fuel ratio is just right.

The TPS’s accuracy is crucial; if it sends the wrong signals, my engine could end up running lean or rich, neither of which is good for performance or fuel economy.

The TPS is essentially the informant for the PCM, letting it know the throttle’s position at any given moment.

This information is used to calculate the volume of air entering the engine, which in turn, determines the amount of fuel released.

It’s a delicate balance, and when the TPS is on point, the engine runs smoothly. But if it’s off, I might experience symptoms like hesitation during acceleration or a surging and stalling engine.

Maintaining the TPS’s electrical connection is vital. Over time, this connection can degrade, leading to power supply interruptions and faulty readings.

Here’s a quick rundown of symptoms that might indicate a problem with the TPS:

  • Check engine light turns on
  • Slow acceleration
  • Sharp bucking or jerking
  • Surging and stalling engine
  • Engine dies right after starting
  • Reduced fuel economy

Each of these symptoms can be a telltale sign that the TPS needs some attention. Regular maintenance and proper cleaning are essential to keep this sensor functioning optimally.

Consequences of a Faulty Throttle Position Sensor

When the throttle position sensor (TPS) fails, it’s like flying blind in a storm without instruments. Suddenly, you’re dealing with a slew of issues that can range from annoying to downright dangerous.

Disconnected TPS results in improper idling and intermittent stalling. The absence of accurate throttle position data disrupts the air and fuel mixture, leading to a cascade of engine troubles.

Here’s what you might experience:

  • Check engine light turns on
  • Slow acceleration
  • Sharp bucking or jerking
  • Surging and stalling engine
  • Engine dies right after starting

The importance of the TPS extends beyond mere convenience; it’s crucial for maintaining the delicate balance between air and fuel that your engine needs to run efficiently.

Without it, you’re not just compromising performance—you’re also risking increased emissions and potentially harming your engine in the long run.

The symptoms are clear indicators that something is amiss. If you notice your engine surging or stalling, or if you’re experiencing sharp bucking or jerking during acceleration, it’s time to investigate.

And let’s not forget the dreaded check engine light—a beacon of problems that could be pointing to a faulty TPS.

It’s not just about the annoyance of light on your dashboard; it’s a sign that your engine’s performance and drivability are compromised, and your emissions could be skyrocketing.

Maintaining the Throttle Position Sensor’s Electrical Connection

I’ve come to realize that keeping the throttle position sensor (TPS) in tip-top shape is crucial for my car’s performance.

Over time, the electrical connection to the TPS can deteriorate, leading to power supply interruptions and skewed readings to the Powertrain Control Module (PCM).

It’s like trying to listen to your favourite radio station with a bad signal – you only get bits and pieces. Ensuring a clean and secure connection is paramount to avoid these issues.

  • Dirt and grime can act as unwanted static, clogging the sensor’s components. It’s essential to keep the TPS and its surroundings clean to prevent any ‘blind spots’ in its function. Here’s a simple checklist I follow:
    • Disconnect the wires connecting the TPS to the vehicle.
    • Clean the TPS with a specialized cleaner and a clean towel.
    • Reconnect everything and ensure it’s snug and corrosion-free.

Remember, a well-maintained TPS contributes to a smooth and responsive drive. It’s not just about avoiding the frustration of poor acceleration or engine stalling; it’s about maintaining the harmony between your car’s air intake and fuel mixture for optimal performance.

Lastly, if you’re experiencing common symptoms like difficulty starting the car, engine misfires, or poor fuel efficiency, it might be time to give your TPS some attention.

And don’t forget, for older models that require direct contact with the throttle body, the sensor might need a reset to recalibrate its readings after cleaning or maintenance.

The Vital Connection: Oil Quality and Camshaft Position Sensor Health

The Vital Connection: Oil Quality and Camshaft Position Sensor Health

The Impact of Oil Viscosity and Cleanliness on Sensor Performance

When I think about the health of my engine’s sensors, I often ponder questions like, Should there be oil on my crankshaft position sensor? or Can low oil cause a camshaft position sensor to go bad? The answers to these questions are more complex than a simple yes or no. Oil viscosity and cleanliness play a crucial role in sensor performance.

For instance, a camshaft position sensor coated in oil might seem alarming, but a thin film of oil is often present due to the sensor’s proximity to lubricated engine parts.

However, excessive oil, potentially indicating a leak, can indeed lead to sensor malfunctions. So, can a camshaft position sensor leak oil? It’s not the sensor itself that leaks, but rather the seal around it that can fail and allow oil to seep through.

Maintaining the right oil level is essential. Too much or too little can affect the Variable Valve Timing (VVT) solenoid operation, which relies on accurate oil pressure to function properly.

Can oil damage a sensor? Absolutely. Contaminated or dirty oil can clog the sensor’s delicate components, leading to erroneous readings and poor engine performance. It’s vital to choose the right oil and filter to prevent such issues. Here’s a quick list of considerations for optimal sensor function:

Understanding the link between oil quality and sensor health is key to ensuring your engine runs smoothly.

Choosing the Right Oil and Filter for Optimal Sensor Function

When it comes to maintaining my car, I’ve learned that not all oils are created equal.

Choosing the right oil and filter is crucial for the health of the camshaft position sensor and the overall performance of the engine.

For instance, a P0341 code indicates issues with the camshaft position sensor’s range or performance, which can be influenced by the oil quality.

I’ve found that using a high-quality oil filter, like the K&N Motorcycle Oil Filter, supports high flow rates while providing outstanding protection from engine contaminants.

This aligns with the snippet highlighting that each filter is specifically engineered for exceptional performance.

Moreover, the debate between 5w30 vs 5w40 motor oils is more than just numbers.

According to experts, 5w30 is the best option for cleaning the engine, offering better protection, and having a longer lifespan. This is especially true in situations where engine cleanliness and protection are paramount.

Lastly, it’s important to remember that the oil level also plays a role in the operation of the VVT solenoid, as a P0014 code can be logged due to low or contaminated engine oil.

So, keeping the oil at the right level and condition is not just about avoiding wear; it’s about ensuring the precise operation of engine components.

Understanding the Link Between Oil Level and VVT Solenoid Operation

When I think about the Variable Valve Timing (VVT) system, I’m reminded of how crucial proper lubrication is.

Maintaining the correct oil level is not just about avoiding the low oil pressure warning light; it’s about ensuring the VVT system operates smoothly.

A VVT solenoid relies on clean, adequately pressurized oil to adjust the timing of the valves efficiently, which in turn optimizes engine performance and fuel efficiency.

Here’s a simple checklist to keep in mind:

  • Regularly check your oil level and top up if necessary.
  • Use the recommended oil grade for your vehicle, like those suitable for a Honda Accord.
  • Schedule timely oil changes to prevent impurities from clogging the VVT system.

Remember, a well-lubricated engine is a happy engine. Neglecting oil levels can lead to a cascade of issues, from rough idling to a decline in fuel efficiency.

If you’re experiencing symptoms like a decrease in fuel economy or rough engine idling, it might be time to inspect the VVT solenoid. And if you’re up for it, replacing a faulty VVT solenoid can be a DIY project—just make sure to remove any debris and check for leftover parts before inserting the new solenoid.


I researched the impact of “Oil on Camshaft Position Sensor” and found intriguing results. Oil leakage can disrupt the sensor’s readings, affecting engine timing and performance. Quick detection and repair prevent costly damage to the engine. Innovative solutions are available to seal leaks and protect sensors. This discovery underscores the importance of regular vehicle maintenance.

Frequently Asked Questions

What are Diagnostic Trouble Codes P1137 and P1345, and how do they affect engine performance?

DTC P1137 indicates an issue with the oxygen sensor or its wiring, which can affect the engine’s air-fuel mixture and smooth operation. P1345 relates to the Camshaft Position Solenoid Valve or VVT solenoid, which can impact engine timing and performance if malfunctioning.

Can a damaged electrical connector cause a P1345 code, and what should I do if it does?

Yes, a damaged electrical connector can trigger the P1345 code. If this occurs, replace the connector and clear the code to see if it resolves the issue. If the code persists, check the VVT solenoid wiring and oil level, and inspect the solenoid itself.

What steps should I follow when installing a camshaft to prevent damage?

During camshaft installation, use quality assembly lube and oil booster, adjust valve spring pressure, prime the oiling system, and run the engine at 2000-2500 RPM for 30 minutes, varying RPMs occasionally to ensure proper break-in and prevent damage.

Why is the Throttle Position Sensor important for engine management?

The Throttle Position Sensor (TPS) is crucial as it regulates the engine’s air intake and ensures an optimal fuel-air mixture. A faulty TPS can cause poor fuel economy, reduced engine power, hesitation during acceleration, and potential engine damage.

How does oil quality affect the Camshaft Position Sensor and VVT solenoid operation?

Oil quality is vital for the health of the Camshaft Position Sensor and VVT solenoid. Clean oil of the correct viscosity ensures proper operation of these components, while low oil levels or dirty oil can lead to malfunctions and engine performance issues.

What are the consequences of a faulty Throttle Position Sensor’s electrical connection?

A degraded electrical connection can interrupt the Throttle Position Sensor’s power supply, leading to inaccurate or no data transmission to the PCM. This can result in erratic engine behaviour, such as surging or stalling, and compromised engine performance.

Leave a comment

About Mohammad Sameer

My name is Mohammad Sameer and I have over 3 years of hands-on experience repairing cars, motorcycles, and trucks. Ever since I operated on my first engine in 2018, I’ve been passionate about all things automotive. In 2021, I launched my blog “Motoring Mastery” to share my knowledge with car enthusiasts and DIY mechanics.