Fault code lookup

BodyB1738

Caution

Severity: Caution - get it checked when you can

Ignition switch status fault

12 brands affected · Description from DFFS data.

Key terms: Control module: a small computer that runs one part of the car

1What it means in plain English

A body system has a fault. Depending on the make, this range can include airbags and seat belts, windows, locks and climate control, and also charging, brake, oil or coolant sensors.

2Common causes

  1. Wiring or connector fault
  2. Faulty sensor or switch
  3. Water or corrosion in a connector
  4. Control module fault
  5. Low battery voltage

3Can I drive?

Caution · drive with care

Do not assume this code is safe to drive. If it concerns the brakes, brake vacuum, charging/alternator, engine oil or coolant, have it diagnosed before driving. Airbags or seat belts may not work in a crash, and a brake or charging fault can leave the car unsafe or stranded. For convenience systems (windows, locks, climate), have it checked when convenient.

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 12

BrandCodeDescriptionSystem
Mercedes-BenzB1738No description available Body
DaewooB1738No description available Body
DFFSB1738Ignition switch status fault BrandBody
GMB1738No description available Body
HoldenB1738No description available Body
HyundaiB1738No description available Body
OpelB1738No description available Body
PeugeotB1738No description available Body
SaabB1738No description available Body
MG (SAIC)B1738ESCL reporting Motor Fault BrandBody
SmartB1738No description available Body
SprinterB1738No description available Body

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 3

These 7-character codes are manufacturer-specific variants of B1738 and may be reported by some scan tools.

BrandCodeDescriptionSystem
HyundaiB173800The SRSCM sets DTC if Pressure-Side Impact(Driver) with wrong ID is detected BrandBody
SsangYongB173800Driver Pressure Side Impact Sensor Misinstallation BrandBody
Mercedes-BenzB17382ADie Taste 'Fondlicht' klemmt. Keine Signaländerung. BrandBody

6Related codes

Browse Bxxx codes or B173xx codes.

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