P2046 OBD-II Trouble Code: Reductant Temp Sensor Circ Interm

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

Red-stars EXCELLENT RATING ON

Cost of diagnosing the P2046 code

P2046 is a diagnostic trouble code (DTC) for "Reductant Temp Sensor Circ Interm". 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 P2046 DIAGNOSTIC Get a fair and transparent estimate upfront

P2046 code definition

The P2046 code indicates that there has been a malfunction in the reductant injector air temperature sensor circuit.

What the P2046 code means

The reductant injector is part of the system that reduces the gas that is expelled through either the catalytic converter in gas engines, or the particulate filter in diesel engines. There are sensors in the exhaust system, used by the reductant injector to input voltage readings to the PCM. These readings allow the PCM to monitor the exhaust system operation, in particular the pressure and the temperature. If this code is stored, it means that the PCM detected that the temperature for the system was not correct.

What causes the P2046 code?

In most cases, this code is the result of corroded, burnt, or damaged wiring, connectors, or other electrical components. However, the PCM may detect an issue if:

  • The exhaust gas temperature sensor is shorted.
  • The reductant temp sensor is faulty.
  • The owner has installed an aftermarket off-road system that decreases the backpressure.
  • There is an exhaust leak.

What are the symptoms of the P2046 code?

The Check Engine light will be illuminated, and the vehicle may expel heavy black smoke when accelerating.

How does a mechanic diagnose the P2046 code?

In order to diagnose this code, the mechanic should first begin by inspecting the electrical components, and repairing any that are damaged, corroded, loose, or shorted. In many cases, this will solve the problem behind the P2046 code. After performing this task, the code should be cleared from the PCM, and the system should be retested.

If the code reappears, then the mechanic should continue with a visual inspection of the exhaust gas temperature sensors, as well as the related circuitry. A digital volt/ohmmeter may be necessary to compare the voltage reading with the manufacturer’s specifications. The mechanic should always clear the code and retest the system after each possible repair, to ensure that they’ve made the proper diagnosis. Once the faulty component is found, it should be repaired or replaced as necessary.

Common mistakes when diagnosing the P2046 code

Most often, mistakes are made when this code is misdiagnosed for a different code entirely. Oxygen sensors are often replaced instead of exhaust gas temperature sensors, for example, which does not solve the issue causing the P2046 code.

How serious is the P2046 code?

While this code won’t directly affect the drivability of the vehicle, it is still considered an important issue that should be dealt with immediately. Without the ability to properly monitor and control the exhaust system, the vehicle will not pass an emissions test. Ignoring this issue could result in larger and more expensive repairs in the future.

What repairs can fix the P2046 code?

In order to repair the cause behind the P2046 code, the mechanic may:

  • Replace faulty electrical components.
  • Replace a shorted exhaust gas temperature sensor.
  • Replace a faulty reductant temp sensor.
  • Repair an exhaust leak.

Need help with a P2046 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.

Check Engine Light
trouble codes
P2046

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P2046 code.

SCHEDULE P2046 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

Related questions

Car does not start. Check Engine light on.
There could be several reasons behind why your Honda Civic will not start. A simple test you can try first yourself is to turn the key to the ON position (do not start the car) and see if the Check...
Engine light came on , was hesitant when i pulled off , sometimes cut off when at stop lights
Hi and thanks for your question. Sounds like there could be a fuel or spark issue with your engine. First you would need to scan the computer for what the engine light code has stored to have a starting place...
P0900 fault code related to 15B22 TRANSMISSION CONTROL MODULE REPROGRAMMING FOR OVERT TCM FAILURE WARNING ford recall
The occurrence of code P0900 is probably not related to Service Campaign 15B22 (https://static.nhtsa.gov/odi/tsbs/2015/SB-10058725-1330.pdf?_ga=1.163152181.88204048.1469644261). That service campaign was initiated by Ford because TCM's were failing to set codes (illuminate the check engine light) when faults occur. Your situation is the...

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