P0549 OBD-II Trouble Code: Exhaust Gas Temperature Sensor Circuit High Bank 2 Sensor 1

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

SCHEDULE P0549 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0549 code

P0549 is a diagnostic trouble code (DTC) for "Exhaust Gas Temperature Sensor Circuit High Bank 2 Sensor 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 P0549 DIAGNOSTIC Get a fair and transparent estimate upfront

check engine light

P0549 Code Definition

The P0549 code is a generic powertrain code related to vehicle speed controls and idle control system problems. In this case, the engine control module (ECM) has found a fault with the exhaust gas temperature sensor circuit, receiving higher than normal voltage signals in bank 2 sensor 1.

Codes related to the P0549 include: * P0547: Exhaust Gas Temp. Sensor Circuit (Bank 2) * P0548: Exhaust Gas Temp. Sensor Circuit Low (Bank 2) * P2034: Exhaust Gas Temp. Sensor Circuit (Bank 2 Sensor 2) * P2035: Exhaust Gas Temp. Sensor Circuit Low (Bank 2 Sensor 2) * P2036: Exhaust Gas Temp. Sensor Circuit High (Bank 2 Sensor 2) * P2082: Exhaust Gas Temp. Sensor Circuit Range/Performance (Bank 2 Sensor 1) * P2083: Exhaust Gas Temp. Sensor Circuit Intermittent (Bank 2 Sensor 1) * P2086: Exhaust Gas Temp. Sensor Circuit Range/Performance (Bank 2 Sensor 2) * P2087: Exhaust Gas Temp. Sensor Circuit Intermittent (Bank 2 Sensor 2)

What the P0549 Code Means

A P0549 code is stored when the exhaust gas temperature sensor registers a high voltage from the bank 2 sensor on the exhaust gas temperature sensor (the side of the engine that does not contain Cylinder 1).

A vehicle’s exhaust gas temperature sensor is most commonly a two-wire sensor. It is a heat sensitive resistor, which converts exhaust temperature to a voltage signal read by the ECM. The sensor is located upstream from the catalytic converter. In a diesel engine, the exhaust gas temperature sensor is going to be most frequently located by the diesel particulate filter (DPF). The exhaust gas temperature sensor is solely responsible for protecting a catalytic converter from excessive heat damage.

The sensor is sent a 5-volt signal from the ECM from one wire, while the second wire is ground. If the signal is higher than 5-volts, a P0549 code is stored, signaling higher than normal exhaust gas temperatures.

What Causes the P0549 Code?

Several problems may cause a P0549 code including: * Damaged or defective exhaust gas temperature sensor * Open or shorted exhaust gas temperature sensor harness * Missing insulation that may cause a short directly to ground * Damaged, faulty, loose, or poor electrical connection to exhaust gas temperature sensor * Use of an aftermarket off-road exhaust system may cause a decrease in pressure * Exhaust leak upstream from exhaust temperature sensor * Damaged or defective ECM (rare)

What are the Symptoms of the P0549 Code?

Symptoms of a P0549 code may include: * Check engine or warning light may illuminate * There may be no symptoms other than a stored P0549 code

How Does a Mechanic Diagnose the P0549 Code?

A mechanic may use several methods to diagnose a P0549 trouble code, including: * Utilize an OBD-II scanner to check for a stored P0549 trouble code * Locate the exhaust gas temperature sensor, which will vary in location depending on whether the model is a gasoline or diesel (sensors in a gasoline model will be between the exhaust manifold and converter, sensors in a diesel model will be located before the DPF) * Locate the specific Bank (in this case, bank 2), which will be on the side of the engine that does not contain Cylinder 1 * Visually inspect the sensor and related circuitry for visible signs of damage, including missing insulation or bare wiring * Remove the exhaust gas temperature sensor and use a digital volt/ohmmeter to check resistance; approximate 150 ohms is the goal * Check voltage on engine side of the pigtail, if 5 volts is not found, the ECM may need to be replaced

Common Mistakes when Diagnosing the P0549 Code

The oxygen sensor may be incorrectly identified as the culprit of the P0549 code, when the true problem is the exhaust gas temperature sensor.

How Serious is the P0549 Code?

Because a vehicle’s safe driving operation most likely will not be impacted due to faults that store a P0549 code, this code is not considered a potentially serious code. When this code appears, it is recommended to take your vehicle to your local service center or mechanic for repair and diagnosis as soon as possible.

What Repairs can Fix the P0549 Code?

Several repairs can fix a P0549 trouble code and include: * Repair any damaged or shorted, open, or loose wiring or connectors * Replace the damaged or defective exhaust gas temperature sensor * Replace or repair the exhaust system, depending on whether aftermarket parts were used or parts may have been removed * Replace a damaged or defective ECM (rare) * Clear all codes, test-drive the vehicle, and rescan to see if any codes reappear

Additional Comments for Consideration Regarding the P0549 Code

This code is frequently found on vehicles with aftermarket exhaust systems, or a catback system. In addition, it is recommended to ensure that any aftermarket system utilized on your vehicle is fully compliant with state emissions laws and regulations.

Need Help with a P0549 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.

trouble codes
Check Engine Light
P0549

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

SCHEDULE P0549 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

3,484

Rating Summary
3,176
153
40
23
92
3,176
153
40
23
92

Richard

10 years of experience
415 reviews
Richard
10 years of experience
This is the second time I’ve had Richard work on my car. He always does an outstanding job and is quick, knowledgeable and professional. Highly recommended!!
2012 DODGE CHALLENGER - CHECK ENGINE LIGHT IS ON - LAS VEGAS, NEVADA

Michael

13 years of experience
372 reviews
Michael
13 years of experience
Mike was an absolute professional when he arrived. He walked me thru the whole process of my repairs and also made good recommendations for preventive issues. His mechanical knowledge and good customer services was a breath of air and greatly appreciated :-)
2007 CHEVROLET AVALANCHE - CHECK ENGINE LIGHT IS ON INSPECTION - MARIETTA, GEORGIA

Rodrigo

10 years of experience
85 reviews
Rodrigo
10 years of experience
Rodrigo was exactly on time, very professional and friendly. He assessed my car, let me know the exact problem when a previous mechanic from a shop in my area was unable to. I felt he was very honest and sincere letting me know the level of urgency that I deal with the issue. Absolutely no pressure. I will absolutely use Rodrigo the next time I need anything to do with my car and will tell everyone about him. This is such a great service, I will never go to another mechanic again. It is so convenient. I couldn’t be happier. :)
2013 SMART FORTWO - CHECK ENGINE LIGHT IS ON - LAS VEGAS, NEVADA

Ricardo

8 years of experience
223 reviews
Ricardo
8 years of experience
Great service and was very helpful on what maintenance my vehicle needed and what to expect in the future. Would definitely recommend to anyone and will.
2004 MITSUBISHI LANCER - CHECK ENGINE LIGHT IS ON - LOS ANGELES, CALIFORNIA

More related articles

Veteran and Military Driver Laws and Benefits in Idaho
The state of Idaho offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch in the...
P2159 OBD-II Trouble Code: Vehicle Speed Sensor B Range/Performance
Diagnostic Trouble Code (DTC): P2159 P2159 code definition Vehicle Speed Sensor B Range/Performance...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...

Related questions

Q: Car stopped randomly and didn't drive afterwards

Hello, thanks for writing in. The computer will go into a failure mode and may not allow the electronic throttle to open if it detects a major computer or sensor fault. There can be many possible failures that will cause...

Q: High-pitched sounds and shuddering at the stop light, dash lights on

The problem is in the traction control system, which detected a fault and turned on the VSC and check engine light. You will need to have the system tested to see what codes were stored and then have them diagnosed...

Q: Does a chevy colbat have 2 knock sensors?

You only have one sensor on this engine. If the P0327 trouble code continues then have the engine checked to see if you have an engine knock or the fuel you are using is below 87 octane, causing the engine...

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