C1238: Wheel speed sensor RR abnormal intervals
Short answer: C1238 means “Wheel speed sensor RR abnormal intervals”. Below is what it means on each of the 2 cars we cover, with a link to the full page for each car.
C1238 on each car
| Car | Meaning on this car | Confidence |
|---|---|---|
| Toyota Passo (1st gen) | Wheel speed sensor RR abnormal intervals (C1238/27) | high |
| Toyota Corolla (9th gen, E120) | Foreign matter is Attached on Tip of Right (C1238/38) | high |
Symptoms
- Warning lamp per chart (see page)
Likely causes
- Wheel speed sensor RR abnormal intervals
What to check, in order
- Follow manual section procedure for this code
Causes and checks above are the general meaning. The exact test steps and values differ by car: open your car’s page.