P0549 OBD-II: Exhaust Gas Temperature Sensor Circuit High

P0549 Severity

Moderate

Will P0549 go away on its own?

Once the vehicle's onboard system no longer detects the issue, most codes will disappear on their own. If your vehicle still has this code, however, it should be properly diagnosed to avoid a more serious problem.

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Moderate severity codes might not threaten the vehicle's safety or functionality immediately, but you should still get it diagnosed within a reasonable time frame to keep your car running well.

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What causes OBD-II fault code P0549?

The Exhaust Gas Temperature (EGT) Sensor tells the engine control module (PCM) the temperature of the exhaust gas coming out of the engine. High exhaust temperatures can lead to engine or turbocharger failure. If the PCM detects an incorrect signal from the EGT sensor, it will store code P0549.

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Tuffy Tire & Auto Service Center - Grandview

4.7
(81)
2.39 mi
1524 W 5th Ave
Columbus, OH
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Excite Auto Repair & Towing

4.4
(15)
5.94 mi
3430 Westerville Road
Columbus, OH
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All In Auto Service

4.9
(22)
6.56 mi
5200 Fisher Road
Columbus, OH
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Tuffy Tire & Auto Service - Grove City

4.4
(520)
6.67 mi
2131 Stringtown Rd
Grove City, OH
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Opens 7:30 AM Mon
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OBD II Fault Code

  • OBD II P0549

OBD-II Code Decreased engine performance is defined as a Exhaust Gas Temperature Sensor Circuit High

The Exhaust Gas Temperature (EGT) Sensor tells the engine control module (PCM) the temperature of the exhaust gas coming out of the engine. High exhaust temperatures can lead to engine or turbocharger failure. If the PCM detects an incorrect signal from the EGT sensor, it will store code P0549.

Decreased engine performance Symptoms

  • Decreased engine performance

Common Problems That Trigger the P0549 Code

  • EGR valve failure
  • Exhaust Gas Temperature (EGT) sensor failure
  • Fuel injector failure
  • Powertrain Control Module (PCM) failure
  • Wiring issue
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