P2209 OBD-II Trouble Code: NOx Sensor Heater Sense Circ Range/Perf Bank 1

Our certified mechanics come to you · 12-month, 12,000-mile warranty

SCHEDULE P2209 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P2209 code

P2209 is a diagnostic trouble code (DTC) for "NOx Sensor Heater Sense Circ Range/Perf Bank 1". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $70.00. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $30.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$70.00$30.00
Toyota$70.00$30.00
BMW$70.00$30.00
SCHEDULE P2209 DIAGNOSTIC Get a fair and transparent estimate upfront

Check Engine Light

P2209 trouble code definition

The P2209 OBD-II trouble code registers when the Powertrain Control Module (PCM) detects an abnormal reading in the NOx (nitric oxide and nitrogen dioxide) sensor for the Bank 1 side of the engine.

What the P2209 code means

At its most basic level, the P2209 trouble code means the on-board computer has detected a gaseous mixture outside of normal parameters, based on input data from the oxygen sensors of the catalytic converter.

What causes the P2209 code?

While there can be a wide variety of issues that can cause the P2209 trouble code to register, the most common cause is a faulty catalytic converter. It is not uncommon for additional issues to be present because catalytic converters rarely fail without another contributing factor, such as an excessively rich fuel composition.

What are the symptoms of the P2209 code?

Oftentimes, there are no symptoms to accompany the P2209 code aside from the illumination of the Check Engine Light on the dashboard. At times, however, there may be a no-start/engine stall condition. If the catalytic converter is especially damaged, there may be hissing noises or engine hesitation when attempting to accelerate.

How does a mechanic diagnose the P2209 code?

The first step in diagnosis is to verify the existence of the P2209 OBD-II trouble code with a specialized scan tool, which is only distributed to qualified technicians and has greater capabilities than those found in auto parts stores. The mechanic can then use the data collected and professional reference manuals to narrow the list of potential causes. Then, he or she conducts a hands-on inspection of the catalytic converter and related components.

Additional tests with a voltage meter or test driving the vehicle may shed light on the underlying cause of the P2209 code registering. Once the issue has been identified and repaired, the mechanic will clear the trouble code and retest with the scan tool to be sure the problem has been resolved.

Common mistakes when diagnosing the P2209 code

Once the P2209 fault code has been verified, mechanics should be wary of making the following mistakes.

  • Failure to clear the P2209 code once repairs have been made
  • Replacing the catalytic converter without investigating what damaged it
  • Replacing the oxygen sensor without verifying it is faulty

How serious is the P2209 code?

Although some vehicles registering this fault code display no symptoms and other vehicles enter a no-start or engine stall state, it is not advisable to ignore the issue or put off an inspection whether you can drive it or not. When left unattended, a faulty catalytic converter or issues contributing to the problem can worsen and affect other system parts. This translates into a need for more comprehensive and expensive repairs later.

What repairs can fix the P2209 code?

Once an experienced mechanic verifies the P2209 OBD-II trouble code, the following repair(s) may be needed:

Additional comments for consideration regarding the P2209 code

In diagnosing a fault code like P2209, it can take up to several hours of dedicated testing. That is because multiple scans, inspections, or other tests may be needed to narrow down the culprit. After a mechanic makes repairs, further testing may be necessary to make sure the root issue has been fully resolved.

Need help with a P2209 code?

YourMechanic is happy to connect you with a qualified technician to troubleshoot your P2209 code. Since our mechanics are mobile, that technician can even come to your home and office for your safety and convenience. Get your quote, book an online appointment, or speak with one of our friendly service representatives at 1-800-701-6230.

Check Engine Light
trouble codes
catalytic converters
oxygen sensors

Fast and easy Check Engine Light is on Inspection service at your home or office.

SCHEDULE P2209 DIAGNOSTIC
Get a fair and transparent estimate upfront

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.5/5

Number of Reviews

3,526

Rating Summary
3,215
155
41
23
92
3,215
155
41
23
92

Jeffrey

24 years of experience
683 reviews
Jeffrey
24 years of experience
Great, fast and knowledgeable
2015 CHEVROLET EQUINOX - CHECK ENGINE LIGHT IS ON - CHARLOTTE, NORTH CAROLINA

Fabrice

17 years of experience
108 reviews
Fabrice
17 years of experience
Mr Beaute was extremely friendly, knowledgeable, and professional. I would love to have him as my full time mechanic. .
2004 DODGE DURANGO - CHECK ENGINE LIGHT IS ON - ORLANDO, FLORIDA

Joe

17 years of experience
95 reviews
Joe
17 years of experience
Joe is great. Very prompt, courtesy and quick. Will be booking him again for additional service.
2009 HONDA ACCORD - CHECK ENGINE LIGHT IS ON - CHICAGO, ILLINOIS

Ben

38 years of experience
883 reviews
Ben
38 years of experience
2003 HONDA ACCORD - CHECK ENGINE LIGHT IS ON - HOUSTON, TEXAS

More related articles

Veteran and Military Driver Laws and Benefits in New Mexico
The state of New Mexico offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch...
Auto Safety Tips
Driving is more than a way to get from point A to point B. Owning and driving a car can also be a highly enjoyable experience. Whether a person is driving...
P0359 OBD-II Trouble Code: Ignition Coil I Primary/Secondary Circuit Malfunction
P0359 code definition The P0359 code indicates that a fault has been detected in one of the vehicle’s ignition coils, generally the number 9 coil. This code can also be associated...

Related questions

Q: Engine light flashing intermittently

This may be related to a faulty or dirty mass air flow sensor. The mass air flow sensor is a unit in the intake system that monitors air intake as it is mixed with fuel prior to being injected into...

Q: Q: Reduced engine power

Code P0120 relates to the throttle position sensor and can be caused by the following: Sticking throttle return spring MAP or TPS connector corrosion Misrouted harness causing chafing Bad TPS Bad PCM Code P0220 relates to the...

Q: Runs fine when cold- after 1/2 hour or so , spits and sputters then quits

Hi and thanks for contacting YourMechanic. To me this symptom sounds like three different problems that could be happening. One problem is that the Engine Gas Recirculation valve (EGR valve) could be stuck open. This will cause the exhaust...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com