P2041 OBD-II Trouble Code: Reductant Injector Air Press Sensor Circuit Intermittent

Our certified mechanics come to you · Get a fair and transparent estimate upfront

Red-stars EXCELLENT RATING ON

Cost of diagnosing the P2041 code

P2041 is a diagnostic trouble code (DTC) for "Reductant Injector Air Press Sensor Circuit Intermittent". 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 $114.99 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.0 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 $114.99 $20.0
Toyota $114.99 $20.0
BMW $124.99 $20.0
SCHEDULE P2041 DIAGNOSTIC Get a fair and transparent estimate upfront

P2041 code definition

Found in both diesel and gasoline engines, the reductant injector helps reduce the noxious fumes expelled through the particulate filter in a diesel engine and the catalytic converter in gasoline fueled engines. When a malfunction is detected in the reductant injector air pressure sensor circuit by the Powertrain Control Module (PCM), a P2041 trouble code is stored.

Related trouble codes:

What the P2041 code means

A P2041 trouble code means that the PCM has received a variation in the system voltage from the reductant injector air pressure sensor that exceeds manufacturer's limitations. For some vehicle models, multiple drive cycles are needed before the Check Engine light illuminates.

What causes the P2041 code?

Causes of a P2041 trouble code include:

  • Loose, broken, corroded, or other damage to wiring connectors and other components

  • Faulty reductant injector air pressure sensor

  • Severe exhaust leak upstream in the system from the exhaust temperature sensor

  • Decrease in back pressure caused by the installation of an aftermarket off road exhaust system

What are the symptoms of the P2041 code?

The only symptom of a P2041 trouble code is excessive black smoke upon acceleration. Other than this, the only other signs of a P2041 trouble code is the lit Check Engine light and the stored trouble code.

How does a mechanic diagnose the P2041 code?

To successfully diagnose a P2041 trouble code, the mechanic needs an advanced scanner or code reader, a digital volt/ohmmeter, a heat gun, and an infrared thermometer with a laser pointer. In addition to the proper equipment, a mechanic needs to perform the following:

  • Visually inspect all related wiring, connectors, and components for any looseness, fault, or corrosion.
  • After repairing the wiring, connectors, or components, clear the trouble code and test the system.
  • If the code returns, connect the scanner and download any stored trouble codes and flash frame data.
  • The mechanic should also inspect the exhaust gas temperature sensor and the surrounding circuitry.
  • The mechanic should pay particular attention to the wiring and connectors near any hot exhaust components. The mechanic is looking for any heat damage cause by the hot exhaust parts.
  • After replacing any damaged parts, clear the code and retest the system.
  • If the code returns, the mechanic should check the resistance of the exhaust gas temperature sensor using the digital volt/ohmmeter.
  • If the sensor falls within specifications, leave the volt/ohmmeter leads attached and heat the exhaust gas temperature sensor using a heat gun.
  • If everything still checks out, turn the ignition to the ON position and test for reference voltage and a ground signal at the exhaust gas temperature sensor electrical connector.
  • If low voltage is detected, disconnect the PCM and check for continuity on the wire leading to the exhaust gas temperature sensor.
  • Continuity on this circuit might indicate that the PCM is at fault. In this instance, check the PCM for continuity and resistance.
  • Clear the trouble code and clear it before retesting the system to see if the code returns.

Common mistakes when diagnosing the P2041 code

Mechanics most often mistake the oxygen sensor for the exhaust gas temperature sensor. Replacing the oxygen sensor does not fix the problem with the trouble code soon returning.

How serious is the P2041 code?

Other than excessive black smoke from the exhaust pipe, a vehicle owner does not have to worry about any serious issues from the storage of a P2041 trouble code.

What repairs can fix the P2041 code?

Repairing a P2041 trouble code can include:

  • Replacing any faulty or damaged wiring, connectors, or components
  • Exhaust gas temperature sensor replacement
  • Replacing damaged wiring, connectors, or components caused by hot exhaust parts
  • PCM replacement and reprogramming

Additional comments for consideration regarding the P0100 code

If the vehicle owner has installed a high-performance exhaust system on the vehicle, the lack of back pressure, due to no catalytic converter, can cause the storage of a P2041 trouble code. To fix this problem, the mechanic can install an inline resistor, of at least 2.5 ohms, between the signal and ground wires. In addition, the mechanic should leave the exhaust gas temperature sensor disconnected. This causes the PCM to read the sensor resistance and pass it without storing a trouble code. Before removing any emission related components, the mechanic should check any local, state, or federal laws concerning this type of modification.

Need help with a P2041 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

OBD-II
trouble codes
P2041

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P2041 code.

SCHEDULE P2041 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating

(7400)

Rating Summary
6879
249
58
41
173
6879
249
58
41
173
 at YourMechanic

David

13 years of experience
393 reviews
David
13 years of experience
Chevrolet Malibu L4-2.4L - Check Engine Light is on Inspection - Marietta, Georgia
He explained everything to me in detail on what I needed to know about my car. Definitely recommend him for getting the job done.
 at YourMechanic

Raymond

37 years of experience
402 reviews
Raymond
37 years of experience
Toyota Camry L4-2.2L - Check Engine Light is on - Las Vegas, Nevada
Raymond did a great job however I was charged for two hours labor and he was only here less than 45 minutes. should I expect this on future appointments with your mechanic ?
 at YourMechanic

Shane

17 years of experience
217 reviews
Shane
17 years of experience
Volkswagen EuroVan V6-2.8L - Check Engine Light is on Inspection - Austin, Texas
Arrived on time. Explained the issues he found and how he will fix it. I have parts on order and will schedule an appointment to have Shane install the parts when they arrive.
 at YourMechanic

Kanstantsin

19 years of experience
51 reviews
Kanstantsin
19 years of experience
Ford F-150 V8-4.6L - Check Engine Light is on Inspection - Littleton, Colorado
Kanstantsin arrived early. Was very courteous and professional. Will highly recommend to anyone. Thank you Kanstantsin.


More related articles

P2294 OBD-II Trouble Code: Fuel Pressure Regulator 2 Control Circuit/Open
P2294 code definition Fuel Pressure Regulator 2 Control Circuit/Open What the P2294 code means When trouble code P2294 sets, it means that...
P2069 OBD-II Trouble Code: Fuel Level Sensor B Circuit Intermittent
P2069 P2069 code definition Fuel Level Sensor B Circuit Intermittent What the P2069 code means P2069 is an OBD-II generic code for the engine control module (ECM) detecting the fuel level sensor B signal is intermittent. The sensor output voltage...
P0865 OBD-II Trouble Code: TCM Communication Circuit Low
P0865 means there is an issue with a communication circuit in the traction control module, likely due to a defective ON/OFF switch.

Related questions

KOEO test code 332
Hello there, A few different things can cause insufficient EGR flow. The most likely are: a stuck closed EGR valve a failed EGR valve solenoid faulty oxygen sensor low fuel pressure exhaust leak These can also result in the reduced...
Pcm
Hello, thanks for writing in about your Ford F-150. I'm curious if you got the new PCM from the dealer. You should check if have the exact same part number on it. If the part numbers do not match and...
How do I clear the P0756 trouble code?
Hi. If the code P0756 has come up, the shift solenoid for second gear is leaking fluid internally. To access the shift solenoid, you will need to remove the oil pan to the transmission. When you do this, drain all...

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 (855) 347-2779 · hi@yourmechanic.com