Quick Answer
P20E6 means: P20E6 means there's a problem with the reduction catalyst temperature sensor circuit in your diesel vehicle.
Can I drive with P20E6? You should address this issue promptly to avoid potential engine damage and ensure compliance with emissions regulations.
Common Questions
What does P20E6 mean and how does it affect my car?
The P20E6 code indicates that there's a malfunction in the reduction catalyst temperature sensor circuit, often leading to poor engine performance and increased emissions. If not addressed, it can cause further damage and affect your vehicle's compliance with emissions standards.
What are the most common causes of P20E6 and how much does it cost to fix?
Common causes include a faulty temperature sensor, damaged wiring, and ECM issues. Repair costs range from $100 to $1,200, depending on the specific repairs needed.
Can I drive my car with P20E6 or should I stop immediately?
While it's possible to drive with this code, it's not advisable, as it can lead to more severe engine issues and failed emissions tests. It's best to have it diagnosed and repaired as soon as possible.
How can I diagnose P20E6 myself using GeekOBD APP?
To diagnose P20E6 yourself, download the GeekOBD APP, connect it to your vehicle's OBD2 port, and scan for codes. Analyze the freeze frame data to understand the conditions under which the code was triggered.
What vehicles are most commonly affected by P20E6?
Commonly affected vehicles include the 2015-2019 Ford Super Duty trucks and some models from other manufacturers that utilize SCR technology in their diesel engines.
How can I prevent P20E6 from happening again?
Regular maintenance, including checking the DEF quality and ensuring that the exhaust system is free from leaks, can help prevent P20E6 from recurring. Routine inspections of the wiring and connectors will also be beneficial.
What is P20E6?
The Diagnostic Trouble Code (DTC) P20E6 indicates an issue with the reduction catalyst temperature sensor circuit on diesel engines, particularly in models like the 2015-2019 Ford Super Duty trucks. This code typically arises when the Engine Control Module (ECM) detects an anomalous signal from the temperature sensor that monitors the temperature of the diesel exhaust fluid (DEF) in the selective catalytic reduction (SCR) system. When the temperature sensor malfunctions or provides incorrect readings, it can lead to inefficient operation of the SCR system, which is responsible for reducing harmful nitrogen oxides (NOx) emissions from diesel engines. Drivers may notice issues such as reduced engine performance, increased emissions, or even failure to comply with emissions tests. Ignoring this code can lead to more significant problems, including potential engine damage or failure to meet environmental regulations. Therefore, if this code appears, it’s essential to address it promptly to maintain optimal vehicle performance and compliance with emissions standards.
System: P - Powertrain (Engine, Transmission, Emissions)
Symptoms
Common symptoms when P20E6 is present:
- Check engine light illuminated on the dashboard, indicating a fault in the emission control system.
- Reduced engine performance, noticeable during acceleration or while carrying heavy loads.
- Increased exhaust emissions, potentially leading to failed emissions testing.
- Unusual engine noises or vibrations, especially when the vehicle is under load.
- Fuel economy may decrease by 10-20%, putting additional strain on your wallet.
Possible Causes
Most common causes of P20E6 (ordered by frequency):
- Faulty temperature sensor: This is the most common cause, with about 60% likelihood. The sensor may be damaged or malfunctioning, leading to incorrect readings.
- Wiring issues: Corroded or damaged wiring can disrupt the signal to the ECM, occurring in roughly 20% of cases. Regular visual inspections can prevent this.
- ECM problems: Although less common, a faulty ECM can misinterpret sensor signals, affecting performance. This occurs in about 10% of cases.
- Defective SCR module: A malfunctioning SCR can cause temperature discrepancies, which is rare but serious.
- Contaminated DEF: If the diesel exhaust fluid is contaminated, it can lead to sensor misreadings. This is a less frequent cause but should be monitored.
P20E6 Repair Costs
Cost Breakdown by Repair Type
Temperature Sensor Replacement
Replacing the faulty reduction catalyst temperature sensor with a new OEM part.
- Total: $150 - $300
- Success rate: 90%
Wiring Repair
Repairing or replacing damaged wiring and connectors leading to the temperature sensor.
- Total: $100 - $250
- Success rate: 80%
ECM Reprogramming or Replacement
Reprogramming or replacing the ECM if it is found to be faulty.
- Total: $500 - $1,200
- Success rate: 70%
Money-Saving Tips for P20E6
- 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 P20E6 Diagnosis Process
Follow these systematic steps to accurately diagnose P20E6. Each step builds on the previous one to ensure accurate diagnosis.
Step 1: Perform a visual inspection of the wiring and connectors leading to the temperature sensor for any signs of damage or corrosion (5-10 minutes)
Step 2: Use the GeekOBD APP to scan the OBD2 system and retrieve all codes and freeze frame data to gain context on the fault (10-15 minutes)
Step 3: Test the temperature sensor with a multimeter to check for continuity and accurate readings (20-30 minutes)
Step 4: If necessary, replace the sensor and clear any stored codes, then verify its operation through system function tests (10-15 minutes)
Step 5: Conduct a road test to ensure that the repair has resolved the issue and that no codes reappear (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: Temperature Sensor Replacement on 2017 Ford F-250
Vehicle: 2017 Ford F-250, 75,000 miles
Problem: Customer reported a check engine light and decreased engine performance.
Diagnosis: After scanning with the GeekOBD APP, the P20E6 code was identified. A visual inspection revealed a damaged temperature sensor.
Solution: Replaced the temperature sensor and cleared the codes.
Cost: $250 (sensor cost and labor)
Result: Engine performance improved, and the check engine light remained off after multiple test drives.
Case Study 2: Wiring Repair on 2019 Ford F-350
Vehicle: 2019 Ford F-350, 40,000 miles
Problem: Customer experienced intermittent engine hesitation and check engine light activation.
Diagnosis: Using the GeekOBD APP, the P20E6 code was confirmed. Inspection found corroded wiring connectors.
Solution: Repaired the damaged wiring and connectors.
Cost: $150 (parts and labor)
Result: The hesitation issue was resolved, and the check engine light did not return.