P039C - DTC P039C - Exhaust Camshaft Position Sensor Performance Problem (Common in 2016-2020 Hyundai Sonata)

Quick Answer

P039C means: The P039C code indicates a problem with the exhaust camshaft position sensor performance.

Fix: Check and replace faulty components Cost: $150 - $300 Time: 90-180 minutes

Can I drive with P039C? It's recommended to address this issue promptly to avoid potential engine damage.

Common Questions

What does P039C mean and how does it affect my car?

The P039C code indicates a malfunction in the exhaust camshaft position sensor, which may lead to engine performance issues, including reduced power and poor fuel efficiency. If left unaddressed, it can cause further damage to the engine.

What are the most common causes of P039C and how much does it cost to fix?

Common causes include a faulty exhaust camshaft position sensor, damaged wiring, or mechanical timing issues. Repair costs can vary from $150 to over $1,200 depending on the necessary repairs and parts.

Can I drive my car with P039C or should I stop immediately?

It is advisable to address the P039C code promptly. While you may be able to drive short distances, ongoing use can lead to more severe engine damage or complications.

How can I diagnose P039C myself using the GeekOBD APP?

Using the GeekOBD APP, you can retrieve the trouble code, view live data from the exhaust camshaft position sensor, and check for any related codes that may provide further insight into the problem.

What vehicles are most commonly affected by P039C?

The P039C code is commonly found in vehicles like the 2018 Hyundai Sonata, 2017 Kia Optima, and 2019 Honda Accord. Owners of these models should be aware of this code due to its prevalence.

How can I prevent P039C from happening again?

To prevent P039C, ensure regular maintenance of your vehicle, including timely oil changes and inspections of wiring and connectors to the exhaust camshaft position sensor.

What is P039C?

The DTC P039C code indicates a performance issue with the exhaust camshaft position sensor. This sensor plays a critical role in the timing of the engine’s valves. When functioning correctly, it communicates the exact position of the exhaust camshaft to the engine control module (ECM). If the ECM detects that the sensor is reporting values that are outside the expected range, it triggers the P039C code. This can lead to significant engine performance issues, including poor fuel efficiency, increased emissions, and rough idling. In some cases, you may notice a lack of power or hesitation during acceleration, which can be frustrating for drivers. Additionally, this code is frequently associated with other trouble codes, such as P039B (exhaust camshaft position sensor 'B' performance). If you own a vehicle like the 2018 Hyundai Sonata or other models equipped with a similar engine, understanding this code is vital for maintaining engine health. Ignoring this code could result in further damage to the exhaust system or the engine itself, leading to more expensive repairs down the line.

System: P - Powertrain (Engine, Transmission, Emissions)

Symptoms

Common symptoms when P039C is present:

The check engine light illuminates or flashes consistently, indicating a serious issue that needs immediate attention.
You might experience engine hesitation or stalling during acceleration, making it difficult to merge or pass on highways.
Fuel economy may drop by 10-15%, leading to more frequent trips to the gas station and increased overall vehicle operating costs.
Rough idling can be felt when the vehicle is at a stop, causing vibrations that may lead to discomfort.
A noticeable decrease in engine power, especially when climbing hills or carrying heavy loads, can also be experienced.

Possible Causes

Most common causes of P039C (ordered by frequency):

The most common cause of the P039C code is a faulty exhaust camshaft position sensor, with a likelihood of around 60%. Sensors can wear out over time due to heat and exposure to engine fluids.
Another potential cause is damaged wiring or connectors to the sensor, which can lead to intermittent signals or complete sensor failure. This issue has a likelihood of about 25%.
Mechanical issues, such as a skipped timing belt or chain, can also trigger this code. Regular maintenance checks can help prevent such issues. The likelihood is roughly 10%.
Less common but serious causes include a malfunctioning engine control module (ECM) that misinterprets sensor data, which can be costly to diagnose and fix.
In rare cases, engine oil contamination can affect sensor performance, which may occur due to poor maintenance habits or using the wrong oil type.

P039C Repair Costs

Cost Breakdown by Repair Type

Sensor Replacement

Replacing the faulty exhaust camshaft position sensor can resolve the P039C code effectively.

Total: $150 - $300
Success rate: 90%

Wiring Repair

Repairing or replacing damaged wiring can also be necessary if the sensor is functioning correctly but not receiving power.

Total: $100 - $200
Success rate: 80%

ECM Reprogramming

In cases where the ECM is misinterpreting signals, reprogramming or replacing the ECM may be required.

Total: $500 - $1,200
Success rate: 70%

Money-Saving Tips for P039C

Start with the most common and least expensive repairs first
Use GeekOBD APP to confirm diagnosis before replacing expensive parts
Consider preventive maintenance to avoid future occurrences
Compare prices for OEM vs aftermarket parts based on your needs
Address the issue promptly to prevent more expensive secondary damage

Diagnostic Steps

Professional P039C Diagnosis Process

Follow these systematic steps to accurately diagnose P039C. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes)

Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes).