Code C1226(1/1), ABS light on?

The Diagnostic Trouble Code (DTC) C1226 in a 1999 Ford F-250 corresponds to a problem related to the right rear excessive wheel speed variation during ABS (Anti-Lock Brake System) operation. This code indicates that there's an issue with the ABS system's sensor or the related components on the right rear wheel.

Here's what you can do to troubleshoot and potentially resolve this issue:

Inspect the Wheel Speed Sensor: Check the wheel speed sensor on the right rear wheel. Look for any damage to the sensor, its wiring, or its connector. A damaged sensor or corroded connection could lead to inaccurate readings.

Check the Tone Ring or Reluctor Ring: The tone ring (also called a reluctor ring) is a toothed ring located on the wheel hub, near the wheel speed sensor. It's what the sensor reads to determine wheel speed. If the tone ring is damaged or has missing teeth, it can cause irregular readings and trigger the ABS warning light.

Clean the Sensor and Tone Ring: Sometimes, debris or rust can accumulate on the sensor or tone ring, disrupting the sensor's ability to read the ring accurately. Cleaning both the sensor and the tone ring could help resolve the issue.

Inspect Wiring and Connectors: Examine the wiring leading to the wheel speed sensor for any breaks, cuts, or exposed wires. Also, check the connector for corrosion or a poor connection.

Clear the Code: After inspecting and addressing any visible issues, you can clear the trouble code using an OBD-II scanner. If the issue was a temporary glitch, the code may not reappear after clearing it.

Test Drive: Take the vehicle for a test drive and pay attention to how the ABS system behaves. If the issue has been resolved, the ABS warning light should stay off, and you shouldn't feel any abnormal behavior during braking.

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