Exhaust Gas Recirculation Temperature Sensor B Circuit Intermittent
There's an intermittent issue with the EGR temperature sensor circuit B.
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What it means (plain English)
The computer checks the temperature of gases going back into the engine and sometimes sees a problem with the sensor reading, which can be caused by loose wires or a bad sensor.
What the computer is actually seeing
The engine control module (ECM) expects a stable voltage reading from the EGR temperature sensor B, typically around 0.5 to 4.5 volts when operational. If it sees voltage spikes or drops unexpectedly, it triggers the fault code.
What a healthy reading looks like
EGR temperature sensor B should output a voltage between 0.5 and 4.5 volts as the temperature varies between about 60°F to 220°F (15°C to 104°C).
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Check the EGR temperature sensor B wiring and connectors for damage or corrosion. Are they intact? If yes, proceed to step 2. If no, repair or replace the wiring or connectors as necessary.
- 22. Using a multimeter, measure the voltage at the EGR temperature sensor B while the engine is running. Is the voltage between 0.5V and 4.5V? If yes, proceed to step 3. If no, replace the EGR temperature sensor B.
- 33. Inspect the EGR system for leaks or blockages. Are there any visible issues? If yes, fix any leaks or blockages. If no, monitor the system for intermittent EGR issues and consider ECM reprogramming.
Common causes
- Faulty EGR temperature sensor B
- Corroded or damaged wiring or connectors
- ECM software glitches
- EGR system leaks
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive my vehicle with this code?
It's moderate severity; fix it soon, as it can affect emissions and engine performance.
Will this code clear itself?
Possible, but if the underlying issue isn’t fixed, it will likely return.
Why do I see this code along with other EGR codes?
Intermittent faults may be related to the same issue affecting the EGR system components.
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