OBD Guide
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P1622

Oxygen Sensor Reference Voltage Circuit High

P1622 is an OBD-II diagnostic trouble code meaning: Oxygen Sensor Reference Voltage Circuit High. Common causes: oxygen sensor malfunction, open or short circuit in the sensor circuit. Estimated repair cost: $28–89.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$28–89 (est.)

Symptoms

  • Increased fuel consumption
  • Unstable engine operation at idle
  • Check Engine Light Illuminates
  • Reduced engine power
  • Increased emissions of harmful substances

Causes

  • Oxygen sensor malfunction
  • Open or short circuit in the sensor circuit
  • Wiring Harness Problems
  • Corrosion of sensor connector contacts
  • Engine control unit malfunction

How to Fix

  1. Check the continuity of the oxygen sensor circuit
  2. Inspect connectors and contacts for corrosion
  3. Check sensor resistance and voltage
  4. If necessary, replace the oxygen sensor
  5. Check the operation of the computer

Related codes

P0130P0131P0132P0133

Error P1622 by Vehicle Brand

BMWBuickCadillacChevroletGMGMCMazdaMercedes-BenzOldsmobileSaturnVolkswagen

FAQ

What does the P1622 code mean?

P1622 is an OBD-II diagnostic trouble code that indicates: Oxygen Sensor Reference Voltage Circuit High

What causes a P1622 error code?

The most common causes of P1622 include: Oxygen sensor malfunction; Open or short circuit in the sensor circuit; Wiring Harness Problems; Corrosion of sensor connector contacts.

How do I fix a P1622 diagnostic trouble code?

To fix P1622: Check the continuity of the oxygen sensor circuit. Inspect connectors and contacts for corrosion. Check sensor resistance and voltage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1622?

Limited driving only, diagnose soon

How much does it cost to fix P1622?

The estimated repair cost for P1622 is $28–89. Actual cost depends on your vehicle, location, and labor rates.

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