OBD Guide
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P1073

Mass Air Flow Sensor 2 Signal Too Small

P1073 is an OBD-II diagnostic trouble code meaning: Mass Air Flow Sensor 2 Signal Too Small. Common causes: malfunction of the second mass air flow sensor, open or short circuit in the sensor circuit. Estimated repair cost: $33–89.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–89 (est.)

Symptoms

  • Unstable engine idling
  • Reduced engine power
  • Increased fuel consumption
  • Difficulty starting the engine
  • Check Engine Light Is On

Causes

  • Malfunction of the second mass air flow sensor
  • Open or short circuit in the sensor circuit
  • Poor contact in the MAF connector
  • Air leak after sensor
  • Sensor contamination

How to Fix

  1. Check the integrity of the sensor electrical circuit
  2. Clean the contacts of the mass air flow sensor connector
  3. Check the tightness of the intake tract after the sensor
  4. Test the sensor using a scanner or multimeter
  5. If necessary, replace the second mass air flow sensor

Related codes

P1072P1074P0101

FAQ

What does the P1073 code mean?

P1073 is an OBD-II diagnostic trouble code that indicates: Mass Air Flow Sensor 2 Signal Too Small

What causes a P1073 error code?

The most common causes of P1073 include: Malfunction of the second mass air flow sensor; Open or short circuit in the sensor circuit; Poor contact in the MAF connector; Air leak after sensor.

How do I fix a P1073 diagnostic trouble code?

To fix P1073: Check the integrity of the sensor electrical circuit. Clean the contacts of the mass air flow sensor connector. Check the tightness of the intake tract after the sensor. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1073?

Limited driving only, diagnose soon

How much does it cost to fix P1073?

The estimated repair cost for P1073 is $33–89. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat