C1239 (blink 28) on Toyota Passo (KGC10): Wheel speed sensor RL abnormal intervals

Short answer: C1239 means “Wheel speed sensor RL abnormal intervals”. The car’s computer has found a fault in the ABS system and turns on the ABS warning light. First check: follow manual section procedure for this code.

Code

C1239 · blink 28

System

ABS

Dashboard light

ABS warning light

Also sold as

Daihatsu Boon, Daihatsu Sirion (M300)

Applies to

M300/M301 export; JDM Boon/Passo 1st gen by platform

Confidence

high (factory chart); description parsing medium

Source

carmanualsclub.com

Symptoms and when it is set

1. Warning lamp per chart (see page)

Likely causes

1. Wheel speed sensor RL abnormal intervals

What to check, in order

1. Follow manual section procedure for this code

Related on this car

• All fault codes for this car
• Warning lights
• Where the parts are (parts map)
• Common problems

Same code on other cars

• C1239 · Toyota Corolla (9th gen, E120)
• C1239 on all cars compared

← C1238/27 C1237/29 →

Clearing the code does not fix the fault. If it comes back, the problem is still there. For brakes, airbags and steering, see a trained mechanic.