Quick Answer
P20EE means: P20EE indicates a problem with the Diesel Exhaust Fluid quality sensor performance.
Can I drive with P20EE? Immediate attention is recommended to prevent further engine damage.
Common Questions
What does P20EE mean and how does it affect my car?
The P20EE code indicates that there's a problem with the Diesel Exhaust Fluid quality sensor. If this issue isn't addressed, you may experience reduced engine performance and increased emissions, potentially leading to more severe engine problems.
What are the most common causes of P20EE and how much does it cost to fix?
Common causes include a faulty DEF quality sensor, DEF contamination, and wiring issues. Repair costs can range from $150 to $300 for sensor replacement, while DEF fluid replacement may cost an additional $100 to $200.
Can I drive my car with P20EE or should I stop immediately?
You can drive your vehicle, but it's advisable to address the P20EE code as soon as possible. Continuing to drive may lead to reduced performance and could potentially damage the engine.
How can I diagnose P20EE myself using GeekOBD APP?
Using the GeekOBD APP, you can scan for codes, view freeze-frame data, and monitor sensor performance in real-time, helping you identify the issue more accurately.
What vehicles are most commonly affected by P20EE?
The P20EE code is commonly seen in diesel models like the Ford F-Series (2011-2019) and Chevrolet Silverado (2011-2019). Always check for any recalls or technical service bulletins (TSBs) related to your specific make and model.
How can I prevent P20EE from happening again?
Regular maintenance of the DEF system, including using high-quality DEF and checking for leaks, can help prevent future occurrences of the P20EE code.
What is P20EE?
The diagnostic trouble code (DTC) P20EE indicates a problem with the Diesel Exhaust Fluid (DEF) quality sensor performance. This code is commonly found in diesel vehicles, particularly in models like the Ford F-Series (2011-2019) and Chevrolet Silverado (2011-2019). The DEF quality sensor monitors the concentration of urea in the DEF. If the sensor detects that the DEF quality is outside of acceptable parameters, it triggers the P20EE code. This can lead to various issues, including reduced engine performance, increased emissions, and even the activation of limp mode, which limits your vehicle's speed and power to protect the engine. Drivers may notice the check engine light illuminated on the dashboard, along with potential symptoms like poor acceleration or decreased fuel efficiency. Ignoring this code can lead to more severe engine problems and costly repairs, so it's crucial to address it promptly. Regular maintenance of the DEF system, including checking for leaks and ensuring the fluid is fresh and uncontaminated, can help prevent this code from appearing.
System: P - Powertrain (Engine, Transmission, Emissions)
Symptoms
Common symptoms when P20EE is present:
- The check engine light remains on, indicating an issue with the DEF system.
- You may experience engine hesitation during acceleration, particularly under load or when climbing hills.
- Fuel economy could decrease by 10-20%, leading to more frequent refueling.
- You might notice a rough idle when the engine is running, especially after starting.
- In some cases, the engine may enter limp mode, significantly reducing power and speed.
Possible Causes
Most common causes of P20EE (ordered by frequency):
- Most commonly, the DEF quality sensor itself is faulty, which occurs in about 60% of cases. This can happen due to wear and tear over time.
- Second, contamination of the DEF can lead to inaccurate readings. If the fluid becomes contaminated with water or other substances, it can trigger the P20EE code.
- Third, wiring issues such as damaged connectors or frayed wires can cause poor communication between the sensor and the vehicle's computer system. Regularly inspect wiring during maintenance.
- Less common but serious causes include a faulty engine control module (ECM) that misinterprets sensor data, which can lead to incorrect diagnostics.
- A rare cause might be a defective DEF pump, which can lead to improper fluid delivery and, consequently, incorrect sensor readings.
P20EE Repair Costs
Cost Breakdown by Repair Type
DEF Quality Sensor Replacement
Replacing the faulty DEF quality sensor with an OEM part.
- Total: $150 - $300
- Success rate: 85%
DEF Fluid Replacement
Flushing the system and replacing the DEF fluid if contamination is detected.
- Total: $100 - $200
- Success rate: 75%
Money-Saving Tips for P20EE
- 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 P20EE Diagnosis Process
Follow these systematic steps to accurately diagnose P20EE. Each step builds on the previous one to ensure accurate diagnosis.
Step 1: Conduct an initial visual inspection of the DEF system, looking for any obvious signs like leaks, damaged wiring, or corrosion (5-10 minutes)
Step 2: Use an OBD2 scanner, such as the GeekOBD APP, to retrieve all diagnostic codes and freeze-frame data, which helps in understanding the fault context (10-15 minutes)
Step 3: Test the DEF quality sensor using a multimeter to check its resistance and ensure it operates within manufacturer specifications (20-30 minutes)
Step 4: Perform a system function test after any repairs, verifying that the vehicle’s computer recognizes changes and clears the codes (10-15 minutes)
Step 5: Take the vehicle for a road test under various driving conditions to confirm that the issue has been resolved (15-20 minutes)
Important Notes
- Always verify the repair with GeekOBD APP after completing diagnostic steps
- Clear codes and test drive to ensure the problem is resolved
- Address underlying causes to prevent code recurrence
Real Repair Case Studies
Case Study 1: Defective DEF Quality Sensor in 2015 Ford F-250
Vehicle: 2015 Ford F-250, 85,000 miles
Problem: Customer reported check engine light and reduced power during acceleration.
Diagnosis: After scanning with the GeekOBD APP, the P20EE code was confirmed. A physical inspection revealed a faulty DEF quality sensor.
Solution: Replaced the DEF quality sensor and cleared the code.
Cost: $250 (including parts and labor)
Result: The check engine light turned off, and the vehicle returned to normal performance after a successful road test.
Case Study 2: DEF Contamination in 2017 Chevrolet Silverado
Vehicle: 2017 Chevrolet Silverado, 50,000 miles
Problem: Customer experienced poor fuel economy and check engine light activation.
Diagnosis: OBD scanning revealed P20EE. A DEF sample test showed contamination.
Solution: Flushed the DEF system and replaced the fluid. The quality sensor was verified as functional.
Cost: $180 (DEF replacement and labor)
Result: Fuel economy improved, and the check engine light remained off after the repairs.