Exhaust Gas Temperature Too High Bank 1
The P2428 code indicates that the exhaust gas temperature (EGT) sensor on Bank 1 has detected a temperature exceeding the maximum threshold. This can be caused by a faulty EGT sensor, a restricted exhaust system (e.g., clogged catalytic converter or DPF), or an engine running too rich. High exhaust temperatures can damage catalytic converters and other exhaust components.
01. Most Common Causes
- Faulty exhaust gas temperature sensor
- Clogged catalytic converter or diesel particulate filter (DPF)
- Engine running too rich (excess fuel)
- Exhaust leak before the sensor
02. Symptoms You Will Notice
- Check Engine Light on
- Reduced engine performance or power loss
- Possible overheating under the hood
- Poor fuel economy
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Inspect the EGT sensor wiring and connector for damage.
Step 3: Test the EGT sensor resistance and compare to specifications.
Step 4: Check for exhaust restrictions by measuring backpressure.
Step 5: Inspect catalytic converter and DPF for clogging.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as high exhaust temperatures can damage catalytic converters and other components. Have it diagnosed promptly.
How much does it cost to fix?▼
The cost varies depending on the cause. Replacing an EGT sensor typically costs $150-$400 including parts and labor. If a catalytic converter needs replacement, costs can exceed $1000.