OBD Guide
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P1146

Heated Oxygen Sensor 2 Minimum Voltage Monitoring Bank 1

P1146 is an OBD-II diagnostic trouble code meaning: Heated Oxygen Sensor 2 Minimum Voltage Monitoring Bank 1. Common causes: faulty oxygen sensor, open or short circuit in the sensor circuit. Estimated repair cost: $28–67.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$28–67 (est.)

Symptoms

  • Increased fuel consumption
  • Unstable engine operation
  • Check Engine Light Is On
  • Reduced engine power
  • Increased emissions of harmful substances

Causes

  • Faulty oxygen sensor
  • Open or short circuit in the sensor circuit
  • Poor contact in the sensor connector
  • Circuit Grounding Problems
  • Engine control unit malfunction

How to Fix

  1. Check the integrity of the sensor wiring harness
  2. Check connections and contacts in the sensor connector
  3. Check the voltage and resistance of the sensor
  4. Replace the oxygen sensor if necessary
  5. Reset the error code and check if it returns

Related codes

P1145P1147P1148

Error P1146 by Vehicle Brand

SubaruVolkswagen

FAQ

What does the P1146 code mean?

P1146 is an OBD-II diagnostic trouble code that indicates: Heated Oxygen Sensor 2 Minimum Voltage Monitoring Bank 1

What causes a P1146 error code?

The most common causes of P1146 include: Faulty oxygen sensor; Open or short circuit in the sensor circuit; Poor contact in the sensor connector; Circuit Grounding Problems.

How do I fix a P1146 diagnostic trouble code?

To fix P1146: Check the integrity of the sensor wiring harness. Check connections and contacts in the sensor connector. Check the voltage and resistance of the sensor. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1146?

Yes, but get it checked soon

How much does it cost to fix P1146?

The estimated repair cost for P1146 is $28–67. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat