Fault code lookup

ChassisC1646

Caution

Severity: Caution - get it checked when you can

SAS Missing Message

6 brands affected · Description from Tata data.

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

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 6

BrandCodeDescriptionSystem
HondaC1646No description available Chassis
HyundaiC1646No description available Chassis
Land RoverC1646No description available Chassis
ProtonC1646No description available Chassis
TataC1646SAS Missing Message BrandChassis
ToyotaC1646No description available Chassis

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 C1646 and may be reported by some scan tools.

BrandCodeDescriptionSystem
HyundaiC164608The SCC Module sets DTC when it received abnormal gear position message from TCM via CAN BrandChassis
HyundaiC164686If invalid TCU CAN message is received, LDWS ECU sets DTC BrandChassis

6Related codes

  • C1640 Vehicle speed sensor driving direction failure
  • C1641 Motor is open circuit or short circuit
  • C1642 The actual current is much higher than computing the goal of the current
  • C1643 Motor current is too high
  • C1644 Failed to disable EEPROM
  • C1645 The actual current is far lower than the calculation of the target current
  • C1647 CAN hardware fault - sensor channel
  • C1648 YRS Missing Message
  • C164A Tire deflation detection function programming failure
  • C164B Tire compatibility failure
  • C164C Brake pedal information failure
  • C164E Stop SW signal error

Browse Cxxx codes or C164xx codes.

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