P16B4
Engine Control Module Self-Test Cruise Control Distance Monitoring Fault
P16B4 is an OBD-II diagnostic trouble code meaning: Engine Control Module Self-Test Cruise Control Distance Monitoring Fault. Common causes: malfunction of distance sensors (radar/lidar), problems with the wiring harness to the cruise control sensors. Estimated repair cost: $17–278.
Symptoms
- Inoperative or unstable cruise control
- The Check Engine light comes on
- No response to cruise control buttons
- Spontaneous shutdown of cruise control
- Errors in other ECM-related systems
Causes
- Malfunction of distance sensors (radar/lidar)
- Problems with the wiring harness to the cruise control sensors
- ECM Software Errors
- Mechanical damage to cruise control components
- Problems with power supply to the cruise control module
How to Fix
- Check error codes in other modules
- Diagnose cruise control distance sensors
- Check the integrity of the wiring harnesses
- Update ECM software
- Check power supply to cruise control module
Related codes
FAQ
What does the P16B4 code mean?
P16B4 is an OBD-II diagnostic trouble code that indicates: Engine Control Module Self-Test Cruise Control Distance Monitoring Fault
What causes a P16B4 error code?
The most common causes of P16B4 include: Malfunction of distance sensors (radar/lidar); Problems with the wiring harness to the cruise control sensors; ECM Software Errors; Mechanical damage to cruise control components.
How do I fix a P16B4 diagnostic trouble code?
To fix P16B4: Check error codes in other modules. Diagnose cruise control distance sensors. Check the integrity of the wiring harnesses. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P16B4?
Yes, but get it checked soon
How much does it cost to fix P16B4?
The estimated repair cost for P16B4 is $17–278. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat