P2031 OBD-II Trouble Code: Exhaust Gas Temperature (EGT) Sensor Circuit Bank 1 Sensor 2

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

Red-stars EXCELLENT RATING ON

Cost of diagnosing the P2031 code

P2031 is a diagnostic trouble code (DTC) for "Exhaust Gas Temperature (EGT) Sensor Circuit Bank 1 Sensor 2". 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. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 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$20.00
Toyota$20.00
BMW$20.00
SCHEDULE P2031 DIAGNOSTIC Get a fair and transparent estimate upfront

P2031 code definition

Exhaust Gas Temperature (EGT) Sensor Circuit Bank 1 Sensor 2

What the P2031 code means

P2031 is an OBD-II generic code for when the Engine Control Module (ECM) detects that, during the exhaust gas temperature (EGT) sensor warm up after the engine is cold started, the sensor does not register the specified temperature range during the testing timeframe.

What causes the P2031 code?

  • The ECM monitors the EGT for an exhaust temperature rise after the engine is started cold. If the temperature is not in a specified temperature range within a certain amount of time, then the ECM flags a fault and turns on the Check Engine Light.

  • The EGT cannot register the exhaust system temperature due to a faulty sensor or wiring.

  • The EGT cannot register the correct exhaust temperature due to soot or ash build up on the sensor, or there is an exhaust leak.

What are the symptoms of the P2031 code?

  • The Check Engine Light will be illuminated and the code for a fault in the EGT sensor circuit will be set in the ECM.

  • The engine may run too rich or lean, depending on manufacturer's failure strategy.

  • The failure mode will depend on other symptoms encountered.

  • The exhaust may be leaking before the sensor.

How does a mechanic diagnose the P2031 code?

  • Scans and documents the codes in the ECM and looks at the freeze frame data for failures

  • Checks the EGT sensor and wiring for damage and listens for exhaust leaks near the sensor

  • Verifies the exhaust temperature of the EGT sensor 1 for bank 1 and compares it to the EGT sensor 2 for bank 1 and replaces the sensor if it is not reading as specified.

Common mistakes when diagnosing the P2031 code

  • Not removing the EGT sensor and checking for excessive soot or ash on the sensor
  • Failing to clean the EGT sensor and retesting before replacing it

How serious is the P2031 code?

Code P2031 is an indication that the ECM has detected the EGT sensor is not reading correctly and the sensor may be indicating a more major problem in the engine causing the wrong temperature readings during engine warm up.

What repairs can fix the P2031 code?

  • Removing and cleaning excessive soot and ash off of the EGT sensor
  • Replacing the EGT sensor or repairing the wiring to it
  • Repairing an exhaust leak in the pipe connection above the sensor

Additional comments for consideration regarding the P2031 code

Code P2031 is for an exhaust temperature sensor on some diesel engines and indicates the sensor did not reach a specific temperature within about a five minute timeframe. Excessive soot or ash build up can insulate the sensor from indicating an accurate temperature. Cleaning the sensor may fix most problems.

Need help with a P2031 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
P2031

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P2031 code.

SCHEDULE P2031 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating

(6,328)

Rating Summary
5,857
225
52
35
159
5,857
225
52
35
159

Gustavo

17 years of experience
296 reviews
Gustavo
17 years of experience
Toyota Corolla - Check Engine Light is on - New Braunfels, Texas
As always, punctual and professional. He explains the problem thoroughly. I feel confident in his work and knowledge.

Greg

22 years of experience
86 reviews
Greg
22 years of experience
Mazda 3 - Check Engine Light is on - Queen Creek, Arizona
Greg was scheduled for 1:00 but he was able to come earlier and let us know right away. He was very thorough and spent his time going thru the entire car.

Gustavo

17 years of experience
296 reviews
Gustavo
17 years of experience
Lincoln Aviator - Check Engine Light is on - San Antonio, Texas
Made call before appt. -courteous-knowledgeable-got part need & did prompt repair after computer check.

Claud

8 years of experience
325 reviews
Claud
8 years of experience
Chevrolet Trax - Check Engine Light is on - Grosse Pointe, Michigan
Very good experience. He arrived on time. Explained what he was going to do. Completed the work and was thorough in what I needed for my next service in plain language vs car jargon. I'm a raving fan of Claud!


Related questions

O2 sensor

Hey there. Oxygen sensors are located in the exhaust system, typically before and after the catalytic converter. Bank 1 is found on the driver's side - if the engine is a V6 or V8. On a 4 cylinder, it would...

More related articles

P0263 OBD-II Trouble Code: Cylinder Number 1 Contribution/Balance Fault
P0263 P0263 code definition Cylinder Number 1 Contribution/Balance Fault What the P0263 code means P0263 is an [OBD-II diagnostic trouble code] which indicates that the engine control module (ECM) detected the cylinder number 1 having low contribution to the running...
P2635 OBD-II Trouble Code: Fuel Pump ‘A’ Low Flow / Performance
P2635 P2635 Code Definition A P2635 code is a generic powertrain code related to computer output circuit issues. It means that the fuel pump 'A’ is registering a low flow, or one not within the preset parameters. Codes related to...
P0361 OBD-II Trouble Code: Ignition Coil K Primary / Secondary Circuit Malfunction
Trouble code P0361 means that a malfunction in an ignition coil, often due to an open or short in the driver circuit.

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