P2432 low

Secondary Air Injection System Air Flow/Pressure Sensor Circuit Low - Bank 2

The P2432 code means the vehicle's onboard diagnostic system has detected: Secondary Air Injection System Air Flow/Pressure Sensor Circuit Low - Bank 2. This is a low severity code.

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Keep driving?
Yes, but fix soon
DIY difficulty
moderate
Estimated cost
$100 - $400 (parts and labor)
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Common Symptoms

  • Check Engine Light illuminated
  • Failed emissions test
  • No noticeable driving issues
  • Secondary air system warning may display
  • Cold start emissions elevated

Probable Causes (Ranked by Likelihood)

  • Shorted secondary air pressure sensor Very High
  • Short to ground in sensor wiring High
  • Corroded sensor connector Moderate
  • ECM sensor input circuit fault Low

Step-by-Step Diagnostic Procedure

  1. Measure sensor signal voltage (should not be near 0V with key on)

  2. Check sensor wiring for shorts to ground

  3. Inspect sensor connector for corrosion or water damage

  4. Measure sensor resistance and compare to specification

  5. Verify ECM sensor input with a voltmeter at the ECM connector

Frequently Asked Questions

Can I drive with code P2432?

Yes, safe to drive. Only the secondary air injection system monitoring is affected.

What causes P2432?

Usually a shorted pressure sensor or wiring. The sensor may have failed internally or water may have entered the connector.

Is P2432 expensive to fix?

Typically $100 to $400. Sensor replacement is the most common fix. Wiring repair is less expensive if that is the cause.

Sources

This page is built from documented references. Verify against your own service info before repair work.

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