SLOPE EXCEEDS THRESHOLD
This code indicates the slope of a sensor signal is outside the expected limits.
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 computer is seeing a sensor's output that changes too quickly or unpredictably, which usually means the sensor is faulty.
What the computer is actually seeing
The control module is monitoring the rate of change of a sensor signal. If the slope of that signal exceeds the preset rate limit (usually defined in volts per second or degrees per second), it triggers this fault code.
What a healthy reading looks like
The slope of the signal should typically be less than 1 volt per second under normal operating conditions, depending on the sensor.
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 wiring and connectors for the affected sensor. Look for frays, loose connections, or corrosion. If there is any damage, repair it immediately. Decision: If wiring is OK, proceed to step 2; if faulty, repair and retest.
- 22. Test the sensor output with a multimeter or scan tool. Compare the observed output to expected performance; look for a slope of less than 1 volt per second. Decision: If output is stable and within range, proceed to step 3; if it's erratic or out of range, replace the sensor.
- 33. Inspect the ECM for any updates or known issues. If you haven’t done an update in a while, check for a software flash. Decision: If there's an update available, apply it and check for codes again; if not, further investigate the ECM.
Common causes
- Faulty sensor
- Wiring issues (shorts or opens)
- Bad connector
- Corroded connections
- ECM or software issues
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's best to fix it soon as it can affect engine performance and emissions.
Will this code come back after I clear it?
If the issue hasn’t been resolved (like a faulty sensor), it will likely come back.
Why does this code appear with other codes?
It often pairs with other sensor-related codes indicating broader issues in the same system.
Working a real vehicle right now?
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