Fault code lookup

PowertrainP1AF4

Caution

Severity: Caution - get it checked when you can

Drive Motor 1 Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit Low Voltage

13 brands affected · Description from GM 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 13

BrandCodeDescriptionSystem
CheryP1AF4Htr water pump output loop low voltage fault/open circuit BrandPowertrain
DaewooP1AF4Drive Motor 1 Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit Low Voltage BrandPowertrain
EOBDP1AF4Juhtimise toitepinge BrandPowertrain
GMP1AF4Drive Motor 1 Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit Low Voltage BrandPowertrain
HoldenP1AF4Drive Motor 1 Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit Low Voltage BrandPowertrain
HondaP1AF4No description available Powertrain
MitsubishiP1AF4Control power supply VOLT. BrandPowertrain
OpelP1AF4Drive Motor 1 Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit Low Voltage BrandPowertrain
PeugeotP1AF4Drive Motor 1 Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit Low Voltage BrandPowertrain
ProtonP1AF4Control power supply VOLT. BrandPowertrain
SaabP1AF4drive motor 1 control module Hybrid/EV battery voltage isolation sensing circuit low voltage BrandPowertrain
MG (SAIC)P1AF4DC isulation resistance Fault_shut down BrandPowertrain
TataP1AF4No 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.

5Related codes

  • P1AF0 Drive motor 1 control module Hybrid/EV battery voltage system isolation lost
  • 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
  • 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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