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P207F Code

P207F Code – What It Means and How to Fix It

P207F is a diagnostic trouble code that indicates a problem with your vehicle’s selective catalytic reduction (SCR) system. If your vehicle gives you this engine code, it may indicate various conditions, including those that could send it into limp mode.

This article will discuss this code’s root causes, symptoms and how to fix the P207F code.

 

What Does the P207F Code Mean?

The P207F engine code indicates “Reductant Quality Performance,” meaning the SCR system is not functioning adequately. Your diesel vehicle’s SCR keeps nitrogen oxide (NOx) levels low and within legal limits, so any issues here can have serious consequences.

If your vehicle doesn’t conform to the EPA’s emission standards, you may encounter problems when taking your vehicle for standard testing or trying to sell it.

 

Related Codes

The P207F code is one of several diesel exhaust fluid (DEF) -related codes with similar causes and symptoms, including:

  • P20EE: SCR NOx catalyst efficiency below threshold
  • P20EE: Reductant system performance
  • P103C: NOx sensor issues
  • P1032: Other NOx sensor faults — manufacturer-specific code
  • P20F4: Reductant consumption too low

You may encounter these codes alongside the P207F code on Cummins, Duramax, Powerstroke and any other diesel engines with a selective catalytic reduction system. 

While many of them have similar root causes, each is a unique diagnostic code that may require a different solution. If you see multiple similar codes, you likely have one significant underlying problem with your SCR system. 

 

Common Causes of the P207F Code

The P207F code has diverse causes.

 

Contaminated or Poor-Quality DEF

Contaminated and low-quality DEF may cause the P207F diesel code. Two of the most common causes are DEF crystallization and using expired or degraded fluid. Sometimes, using low-grade fluid (or entirely the wrong type) may cause problems.

 

DEF Tank or Injector Issues

Another common cause of the P207F code is a problem with system components like tanks, lines or injectors. The system may malfunction due to blockages, leaking components or frozen diesel exhaust fluid — which happens at around 12°F. 

If crystallization has taken place, injectors may become blocked. Faulty injectors and sensors may also cause this code or secondary issues.

 

Sensor or SCR System Failure

Sensor failure or malfunction is common in SCR systems and can trigger the P207F code. One of the most likely causes in this instance is a DEF quality sensor malfunction, where the sensor detects high-quality fluid as subpar and issues a warning.

While bad DEF fluid is a common problem, DEF sensor failure may present the same way.

 

Symptoms of the P207F Code

Various symptoms may indicate a P207F code, including:

  • Illuminated check engine light (CEL): When the system detects a problem, it may activate the check engine light, alerting you to potentially hazardous issues.
  • DEF warning messages: Your DEF system may send warning messages or error codes to alert you to the problem and help you identify the cause.
  • Limp mode activation: When your DEF or SCR system malfunctions, your vehicle may enter limp mode, leading to decreased torque and lower vehicle speeds.
  • Reduced fuel economy: A vehicle experiencing SCR problems may have lower fuel economy than usual.

These are just a few possible symptoms, varying significantly based on the root cause.

 

How to Fix the P207F Code

Now that we’ve discussed these codes, let’s determine how to rectify the problem.

 

Inspect and Replace DEF

First, check and refill the DEF tank. Sometimes, you may need to drain and replace the existing DEF.

Ensure you use a premium-quality, certified DEF (ISO 22241 standard) to prevent sensor problems and other issues caused by low-quality DEF.

 

Clean or Replace DEF Components

Next, inspect your DEF components for clogging, crystallization and other similar problems. If crystallization occurs, you can use a product like Hot Shot’s Secret Premium DEFender™ to dissolve the crystals and restore flow. At the same time, you should check the SCR sensors and replace them if needed.

 

Resetting the Code

Resetting this kind of SCR error code requires several steps.

First, you will require an OBD-II for P207F clearance. This diagnostic scanning tool allows you to determine what kind of problem the system is facing.

After resolving the problem, you can move on to resetting the code. In most cases, running a complete drive cycle after remedying the problem should clear the code. This step allows the electronic control unit to verify system health, and can vary based on engine type. 

Most of the time, simply resetting the code using a capable OBD-II scanner should be sufficient. However, when the code shows up as permanent or keeps recurring, you may need professional diagnostic assistance.

Some vehicles may need professional service or resetting to eliminate the code.

 

Preventing the P207F Code

Preventing the P207F code is relatively simple if you practice a few basic core principles.

  • Maintain the DEF level: Keeping your DEF tank full is one of the best ways to avoid DEF issues. 
  • Consistently use premium DEF: Low-quality fluid can have many negative impacts, making fluid quality essential.
  • Practice good storage: Keeping your DEF in a cool, dry place out of direct sunlight will ensure it remains usable longer and help prevent crystallization.
  • Use additive products: A high-quality additive that supports your DEF system, prevents and dissolves crystals and improves lubrication can help keep your system running smoothly.
  • Do regular maintenance: Regular system maintenance helps keep your system in shape, preventing degradation and secondary issues.

It’s also worth noting that the EPA has issued guidance that will change the scope of limp mode in the future, allowing drivers a grace period to repair the underlying cause before the vehicle enters limp mode. 

The new guidance provides a staged system for systematically reducing engine power after a confirmed DEF or SCR fault. The details differ based on vehicle class, but these changes help ensure drivers aren’t left stranded without warning in limp mode.

Car manufacturers may choose to roll out software updates early to bring their vehicles in line with this new approach.

 

Trust Premium DEFender™ With Your Vehicle’s SCR System

Keep your DEF and SCR systems running smoothly with Hot Shot’s Secret Premium DEFender™. This product cleans and prevents crystal formation, ensuring consistent flow and eliminating many common problems. Depending on the root cause, it can clear many common SCR or DEF trouble codes, including P207F.

Don’t leave it all to chance or let this code sideline your truck. Keep your emissions system clear and functioning with Premium DEFender™.

 

FAQs About the P207F Code

Can I drive with a P207F code?

While it’s possible to drive with a P207F code for a limited time, we don’t recommend it. The code means there’s a problem with your DEF or SCR system, and continued driving may exacerbate the problem or cause limp mode. 

 

How serious is the P207F code?

The P207F code varies in severity, but it is potentially catastrophic. As it indicates a problem with your vehicle’s selective catalytic reduction, it may lead to a significant problem like limp mode or engine shutdown.

 

Will bad DEF cause a P207F code?

Yes, contaminated or degraded diesel exhaust fluid can cause a P207F code. However, many other problems may also cause this code.

 

How much does it cost to fix P207F?

The repair cost may vary significantly based on the severity of the underlying problem. A simple diagnostic scan of the P207F with an OBD-II scanner may cost as little as $100-$200. However, depending on what the scan discovers, the repairs may cost between $100 and $3,000, if not more.