P0549

Exhaust Gas Temperature Sensor Circuit High Bank 2 Sensor 1

Q: Is it safe to drive with P0549?

Usually yes for short trips, but on turbo-diesels it can trigger reduced power to protect the DPF and turbo. Have it diagnosed soon.

Q: Can I just clear P0549?

You can, but it returns until the sensor or wiring fault is fixed. This is a monitoring sensor, so clearing it doesn't repair anything.

Exhaust / emissions Generic OBD-II Medium

What it means

P0549 means the ECM sees an abnormally high voltage on the bank 2, sensor 1 exhaust gas temperature (EGT) sensor circuit, which usually points to an open or short-to-power in the sensor or its wiring rather than a genuinely hot exhaust. The EGT sensor protects the turbo and exhaust after-treatment, so on some diesels this can limit power until it's fixed.

Medium

Can I keep driving? Usually driveable, but some turbo-diesel vehicles drop into reduced-power/limp mode to protect the exhaust after-treatment, so get it checked promptly.

Real-world scan data

Seen in

167

scans in the past year

Found in

<0.1%

of scans

0.1%

of scans that found faults

Appears alongside · share of P0549 scans

P0645in 62.3% of scans

P0030in 31.1% of scans

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

Common symptoms

What you'll notice

Check-engine light on
Often no noticeable change in how the car drives
Reduced power or limp mode on some turbo-diesel vehicles
Diesel particulate filter (DPF) regeneration may be disabled

Common causes

Most likely first

Faulty exhaust gas temperature (EGT) sensor on bank 2, sensor 1Likely
Open circuit or short to voltage in the sensor wiring (a high reading usually points here)Common
Corroded or loose sensor connectorCommon
High resistance in the signal or ground wireLess often
Less commonly, a faulty ECMLess often

How to diagnose & fix

Work through it in order

Read freeze-frame data to see when the fault set.
Inspect the EGT sensor connector and wiring for opens, chafing, or a short to power.
Measure the sensor's resistance and signal against the manufacturer's spec.
Replace the EGT sensor if it is out of range.
Repair any wiring faults, then clear the code and re-test.

FAQ

Quick answers

Is it safe to drive with P0549?+

Usually yes for short trips, but on turbo-diesels it can trigger reduced power to protect the DPF and turbo. Have it diagnosed soon.

Can I just clear P0549?+

You can, but it returns until the sensor or wiring fault is fixed. This is a monitoring sensor, so clearing it doesn't repair anything.

Read & clear P0549 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX