P2428
Exhaust Gas Temperature Too High Bank 1
Exhaust / emissions
Generic OBD-II
Medium
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.
Medium
Can I keep driving? Drive gently and get it checked soon — genuinely high exhaust temperatures can damage the catalytic converter, turbo, or particulate filter.
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?+
Drive gently and diagnose it soon. If exhaust temperatures are truly high, continued hard driving can damage the converter, turbo, or particulate filter. If it is only a faulty sensor, the risk is lower, but you should confirm which it is.
Can I just clear P2428?+
It returns unless the sensor or the cause of the high temperature is fixed. Clearing it does not remove any real overheating risk.
Related codes
Often seen with P2428
Read & clear P2428 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX