Fault code lookup

PowertrainP1AF0

Caution

Severity: Caution - get it checked when you can

Drive motor 1 control module Hybrid/EV battery voltage system isolation lost

14 brands affected · Description from Toyota 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 14

BrandCodeDescriptionSystem
CheryP1AF0ECO light output loop low voltage fault/open circuit BrandPowertrain
DaewooP1AF0Drive Motor Control Module Hybrid/EV Battery Voltage System Isolation Lost BrandPowertrain
EOBDP1AF0BPS toiteahel BrandPowertrain
GMP1AF0Drive Motor Control Module Hybrid/EV Battery Voltage System Isolation Lost BrandPowertrain
HoldenP1AF0Output Speed Sensor Circuit BrandPowertrain
HondaP1AF0No description available Powertrain
MitsubishiP1AF0BPS power supply circuit BrandPowertrain
OpelP1AF0Drive Motor 1 Control Module Hybrid/EV Battery Voltage System Isolation Lost BrandPowertrain
PeugeotP1AF0Drive Motor 1 Control Module Hybrid/EV Battery Voltage System Isolation Lost BrandPowertrain
ProtonP1AF0BPS power supply circuit BrandPowertrain
SaabP1AF0drive motor 1 control module Hybrid/EV battery voltage system isolation lost BrandPowertrain
MG (SAIC)P1AF0Output Speed Sensor General Fault BrandPowertrain
SuzukiP1AF0Hybrid / EV Battery Cell Voltage Correlation BrandPowertrain
ToyotaP1AF0Drive motor 1 control module Hybrid/EV battery voltage system isolation lost BrandPowertrain

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.

5Related codes

  • P1AF1 EO light output loop high voltage fault
  • P1AF2 Drive Motor 2 Control Module Hybrid/EV Battery Voltage System Isolation Lost
  • P1AF3 Small starter relay output loop high voltage fault
  • P1AF4 Drive Motor 1 Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit Low Volt...
  • P1AF5 Drive Motor 1 Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit High Vol...
  • P1AF6 Drive Motor 2 Control Module Hybrid/EV Battery Voltage Sense Circuit Low Voltage
  • P1AF7 Drive Motor 2 Control Module Hybrid/EV Battery Voltage Sense Circuit High Voltage
  • P1AF8 Htr water pump output loop low voltage fault
  • P1AF9 Quick charger initial check out
  • P1AFA The bus voltage is lower than the lower power limit of the operating voltage
  • P1AFB The bus voltage is higher than the upper limit of the operating voltage power
  • P1AFC Crash detection input circuit high voltage fault/open circuit

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