PARKING ASSIST SENSOR FAULT
Fault in the parking assist sensor system.
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 parking assist system is having trouble with one or more sensors that help detect obstacles when you park.
What the computer is actually seeing
The body control module sees a persistent fault signal from one or more of the parking assist sensors when the vehicle is in reverse gear.
What a healthy reading looks like
Sensor voltage should be around 5V at idle; return signal should be fluctuating between 0.5V to 2.5V when detecting obstacles.
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 for any visible damage to the parking assist sensors and their wiring harness. Look for signs of moisture or wear.
- 22. Inspect the connectors for corrosion or loose connections; clean and reconnect if necessary. Decision: If repairs needed, fix prior to further testing.
- 33. Use a multimeter to measure voltage at the sensor connector. Expect a value around 5V. Decision: If no voltage, check wiring back to the body control module.
- 44. If voltage is good, test the sensor output while activating the sensors (using a scan tool if available). Expect fluctuating signals when obstacles are present. Decision: If no signal, the sensor is likely faulty. Replace and retest.
- 55. After replacement, clear the code and test the parking assist system to verify functionality.
Common causes
- Faulty parking assist sensor
- Damaged wiring or connectors
- Water intrusion in sensor area
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code active?
Yes, it's drivable, but you'll lose the parking assist feature until fixed.
Will this code come back after repairs?
If repaired correctly, the code should not return.
Why might this code appear alongside other codes?
Related codes often indicate problems with multiple sensors or wiring issues affecting the same system.
Working a real vehicle right now?
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