C1776
Speed Sensor Circuit
C1776 is an OBD-II diagnostic trouble code meaning: Speed Sensor Circuit. Common causes: open/short circuit in the sensor wiring harness, dirty or damaged speed sensor. Estimated repair cost: $33–167.
Symptoms
- No speedometer readings
- Cruise control not working
- Activating the ABS/ESP warning light
- Uneven gear shifting (for automatic transmission)
Causes
- Open/short circuit in the sensor wiring harness
- Dirty or damaged speed sensor
- ABS module malfunction
- Poor contact in the sensor connector
- Mechanical damage to the ring gear
How to Fix
- Visual inspection of the sensor and wiring
- Checking the sensor resistance (according to specification)
- Diagnostics of the sensor signal with an oscilloscope
- Cleaning the connector contacts
- Replacing the sensor if a malfunction is detected
- Checking the integrity of the ring gear
Related codes
FAQ
What does the C1776 code mean?
C1776 is an OBD-II diagnostic trouble code that indicates: Speed Sensor Circuit
What causes a C1776 error code?
The most common causes of C1776 include: Open/short circuit in the sensor wiring harness; Dirty or damaged speed sensor; ABS module malfunction; Poor contact in the sensor connector.
How do I fix a C1776 diagnostic trouble code?
To fix C1776: Visual inspection of the sensor and wiring. Checking the sensor resistance (according to specification). Diagnostics of the sensor signal with an oscilloscope. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C1776?
Do not drive — repair immediately
How much does it cost to fix C1776?
The estimated repair cost for C1776 is $33–167. Actual cost depends on your vehicle, location, and labor rates.
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