Exhaust Gas Temperature Too High Bank 1
What it means
P2428 means the engine computer sees an exhaust gas temperature on bank 1 that is higher than allowed. This can be a genuinely hot exhaust from a rich or misfiring condition or a restricted converter, or simply a temperature sensor reading falsely high. Because real overheating can damage the converter, turbo, or particulate filter, it should be diagnosed promptly.
Can I keep driving? Drive gently and get it checked soon — genuinely high exhaust temperatures can damage the catalytic converter, turbo, or particulate filter.
Real-world scan data
Appears alongside · share of P2428 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
- Possible reduced power or limp mode
- Higher-than-normal exhaust or under-car heat in some cases
- Often no obvious symptom besides the light
Common causes
Most likely first
- Failed or drifting exhaust gas temperature sensor reading falsely highLikely
- Genuinely high exhaust temperature from a rich or misfiring conditionCommon
- Restricted or overloaded catalytic converter or particulate filterCommon
- EGR or fuel/air control fault raising combustion temperaturesLess often
- Wiring or connector fault at the temperature sensorLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and compare the exhaust temperature sensor reading to actual conditions.
- Check for misfire, rich-running, or EGR codes that could raise real exhaust temperature.
- Inspect the temperature sensor connector and wiring for damage.
- Assess the catalytic converter or particulate filter for restriction.
- Repair the underlying cause or replace the sensor, then clear and re-test.
FAQ
Quick answers
Is it safe to drive with P2428?+
Can I just clear P2428?+
Related codes
Read & clear P2428 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.