C1551 (blink 51) on Toyota Passo (KGC10): Battery voltage abnormal rise/drop

Short answer: C1551 means “Battery voltage abnormal rise/drop”. The car’s computer has found a fault in the EPS system and turns on the Power steering (EPS) warning light. First check: follow manual section procedure for this code.

Code

C1551 · blink 51

System

EPS

Dashboard light

Power steering (EPS) 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. Battery voltage abnormal rise/drop

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

• C1551 · Toyota Corolla (9th gen, E120)
• C1551 on all cars compared

← C1534/34 C1552/52 →

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.