OBD Guide
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B2278

Steering Shaft Torque Sensor Malfunction

B2278 is an OBD-II diagnostic trouble code meaning: Steering Shaft Torque Sensor Malfunction. Common causes: open or short circuit in the sensor circuit, poor contact in the sensor connector. Estimated repair cost: $56–167.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–167 (est.)

Symptoms

  • Stiff or too light steering
  • EPS or Check Engine light is on
  • No power steering
  • Unstable operation of the amplifier at low speeds

Causes

  • Open or short circuit in the sensor circuit
  • Poor contact in the sensor connector
  • Mechanical damage to the sensor
  • EPS control unit malfunction
  • Contact corrosion or wire oxidation

How to Fix

  1. Check the integrity of the wiring harness and sensor connectors
  2. Measure resistance and voltage at the sensor
  3. Check for corrosion or oxidation of contacts
  4. Replace the torque sensor if necessary
  5. Scan the EPS control unit for additional errors

Related codes

B2277B2279C1516C1517

FAQ

What does the B2278 code mean?

B2278 is an OBD-II diagnostic trouble code that indicates: Steering Shaft Torque Sensor Malfunction

What causes a B2278 error code?

The most common causes of B2278 include: Open or short circuit in the sensor circuit; Poor contact in the sensor connector; Mechanical damage to the sensor; EPS control unit malfunction.

How do I fix a B2278 diagnostic trouble code?

To fix B2278: Check the integrity of the wiring harness and sensor connectors. Measure resistance and voltage at the sensor. Check for corrosion or oxidation of contacts. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2278?

Do not drive — repair immediately

How much does it cost to fix B2278?

The estimated repair cost for B2278 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat