Fault code lookup

ChassisC0078

Caution

Severity: Caution - get it checked when you can

Tire Diameter

28 brands affected · Generic SAE J2012 description.

Key terms: ABS: anti-lock braking, which stops the wheels locking · Stability control: helps stop the car skidding · Wheel speed sensor: measures how fast each wheel turns · SAE J2012: the standard generic code list

1What it means in plain English

A chassis system has a fault, usually ABS, traction control or stability control, but some makes use this range for airbags, electric power steering or park brakes.

2Common causes

  1. Faulty wheel speed sensor
  2. Damaged sensor ring or wiring
  3. Faulty ABS module
  4. Low brake fluid
  5. Wheel bearing damage

3Can I drive?

Caution · drive with care

If the code names an airbag or SRS system, the airbag may not deploy in a crash: have it diagnosed promptly. If it names electric power steering, the assist may fail and the steering can become heavy: stop safely if that happens. If it names the brakes or park brake, have it checked before driving when braking feels abnormal. Otherwise ABS and stability control may be disabled: drive carefully, especially in wet conditions, and have it checked soon.

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 28

BrandCodeDescriptionSystem
Ashok Leyland CVC0078Tire Diameter SAEChassis
BAIC MotorC0078Tire Diameter BrandChassis
Mercedes-BenzC0078Tire Diameter SAEChassis
BYDC0078Tire Diameter BrandChassis
CheryC0078Tire Diameter BrandChassis
DaewooC0078Tire Diameter BrandChassis
DFFSC0078Tire Diameter BrandChassis
DFFXC0078Tire Diameter BrandChassis
DFXKC0078Tire Diameter BrandChassis
EOBDC0078Dekkdiameter BrandChassis
GeelyC0078Tire Diameter BrandChassis
GMC0078Tire Diameter SAEChassis
Great WallC0078Tire Diameter BrandChassis
HafeiC0078Tire Diameter BrandChassis
HoldenC0078Option Configuration - Tire Size BrandChassis
HondaC0078Tire Diameter SAEChassis
HyundaiC0078Tire Diameter SAEChassis
Land RoverC0078Tire diameter BrandChassis
MaseratiC0078Tire Diameter Signal Invalid BrandChassis
OpelC0078Tire Diameter BrandChassis
PeugeotC0078Tire Diameter SAEChassis
ProtonC0078Tire Diameter SAEChassis
SaabC0078Tire Diameter BrandChassis
MG (SAIC)C0078Tire Diameter BrandChassis
SubaruC0078Tire Diameter SAEChassis
SuzukiC0078Tire Diameter SAEChassis
TataC0078Tire Diameter SAEChassis
ToyotaC0078Tire diameter BrandChassis

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 1

These 7-character codes are manufacturer-specific variants of C0078 and may be reported by some scan tools.

BrandCodeDescriptionSystem
Mercedes-BenzC007800Brake Light Switch, power supply undervoltage BrandChassis

6Related codes

  • C0070 RF ABS Solenoid #1 Circuit Malfunction
  • C0071 2/4 wheel drive status input
  • C0072 Brake Temperature Too High
  • C0073 Delivered Driving Torque
  • C0074 Requested Driving Torque
  • C0075 Brake Pedal Position Performance
  • C0076 PWM for traction control
  • C0077 Low Tire Pressure
  • C0079 Variable effort steering
  • C007C Param_ urrePressRequlNo6
  • C007000 Front right solenoid circuit error(outlet)
  • C007200 The temperature of the brake disks is too high.

Browse Cxxx codes or C007xx codes.

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