Data Erroneous - Electronic Control Unit (ECU) Measurement
ECU sensed a value that doesn't make sense compared to expected parameters.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The engine computer saw a reading from a sensor that was way off from what it should be, like a temperature reading of -40°F when it's actually 70°F.
What the computer is actually seeing
The ECU interprets erroneous data where input values are outside of preset ranges, leading to potential miscalculations in system operations.
What a healthy reading looks like
For temperature sensors, look for values between -40°F and 257°F; values below this range or above 257°F trigger the code.
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 sensor wiring for damage, corrosion, or loose connections. Repair as needed. Decision: Are connections intact? (Yes: Step 2, No: Fix wiring)
- 22. Measure the actual sensor output using a multimeter. For a temperature sensor, expect a voltage signal correlating to ambient temperature (e.g., 0.5V at 32°F). Decision: Is the measured value within specs? (Yes: Step 3, No: Replace sensor)
- 33. Inspect the ECU for signs of damage or corrosion, especially on connectors. Clear the code and see if it returns. Decision: Did the code reappear? (Yes: Replace ECU, No: Issue is resolved)
Common causes
- Faulty sensor
- Wiring issues or shorts
- Open circuits
- ECU software glitches
- Bad grounds
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's generally safe but monitor for performance issues. Address it soon as it can affect engine efficiency.
Will this code come back after clearing?
If the issue isn't resolved, yes. If it was a temporary glitch, it may not.
Why does this occur with other SPN codes?
It's common for multiple codes to trigger from the same faulty sensor or wiring issue.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
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