Fault code lookup

PowertrainP10B9

Caution

Severity: Caution - get it checked when you can

NO. 186 battery voltage sampling wire loop fault

10 brands affected · Description from BYD data.

Key terms: Control module: a small computer that runs one part of the car · Powertrain: engine, transmission and emissions

Safety: This code relates to the charging system. The battery may go flat and the car may stall.

1What it means in plain English

The engine or powertrain control system has stored a fault that does not have specific guidance in this database yet.

2Common causes

  1. Sensor or actuator fault
  2. Wiring or connector fault
  3. Vacuum or intake leak
  4. Fuel or ignition problem
  5. Control module fault

3Can I drive?

Caution · drive with care

The electrical system may fail and the battery may go flat, risking a stall. If the battery or charging warning light is on, drive straight to a workshop.

This page gives general information. It is not professional advice. For a definite diagnosis and a repair quote, ask a qualified mechanic to inspect the car.

4Brand data 10

BrandCodeDescriptionSystem
BYDP10B9NO. 186 battery voltage sampling wire loop fault BrandPowertrain
DaewooP10B9No description available Powertrain
EOBDP10B9Fuel level BrandPowertrain
GMP10B9No description available Powertrain
HoldenP10B9Barometric Pressure Sensor Signals Message Counter Incorrect BrandPowertrain
MitsubishiP10B9Oil pump fail BrandPowertrain
OpelP10B9No description available Powertrain
PeugeotP10B9No description available Powertrain
ProtonP10B9Oil pump fail BrandPowertrain
SaabP10B9No description available Powertrain

Legend: SAE is the generic J2012 description; Brand is text taken from that manufacturer’s data. Manufacturer rows keep the wording and language of the source data, and non-English text is tagged so screen readers pronounce it correctly.

5Extended variant codes 2

These 7-character codes are manufacturer-specific variants of P10B9 and may be reported by some scan tools.

BrandCodeDescriptionSystem
Mercedes-BenzP10B900Abgastemperatursensor vor SCR (T6) - Plausibilität zu Modell BrandPowertrain
SprinterP10B900Abgastemperatursensor vor SCR (T6) - Plausibilität zu Modell BrandPowertrain

6Related codes

  • P10B0 Sub relay circuit malfunction
  • P10B1 Monitoring of fuel injector for cylinder 1: malfunction detected; No signal/communication
  • P10B2 Monitoring of fuel injector for cylinder 2: malfunction detected; No or incorrect basic s...
  • P10B3 Monitoring of fuel injector for cylinder 3: malfunction detected; Short to plus
  • P10B4 Monitoring of fuel injector for cylinder 4: malfunction detected; Short to ground
  • P10B5 Brake Pressure Sensor. Sensor F. Low Signal
  • P10B6 NO. 183 battery voltage sampling wire loop fault
  • P10B7 NO. 184 battery voltage sampling wire loop fault
  • P10B8 NO. 185 battery voltage sampling wire loop fault
  • P10BA Oil pump fail (rationality)
  • P10BB NO. 188 battery voltage sampling wire loop fault
  • P10BC NO. 189 battery voltage sampling wire loop fault

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