Secondary Air Injection System Control 'B' Circuit High
The P2260 code means the vehicle's onboard diagnostic system has detected: Secondary Air Injection System Control 'B' Circuit High. This is a moderate severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $100 - $500 (parts and labor)
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What Are the Symptoms of P2260?
- Check Engine Light on
- Failed emissions test
- B air pump may run continuously
- Hissing noise from engine area
- No major drivability issues
What Causes P2260? (Most Likely First)
- Open circuit in B control wiring Very High
- Short to voltage in B circuit High
- Corroded B relay socket Moderate
- ECM B driver open Low
Can I Still Drive with P2260?
Yes, but fix soon. P2260 is rated moderate severity. It is not an immediate stop-driving fault, but it will not clear itself — book the repair rather than ignoring the light.
Frequently Asked Questions
What is the secondary air injection system?
The secondary air injection system pumps fresh air into the exhaust during cold start to help the catalytic converter reach operating temperature faster and reduce cold-start emissions.
Will this code cause my car to fail emissions?
Yes, secondary air injection codes will almost always cause an emissions test failure because the system is specifically designed to reduce startup emissions.
Can I delete the secondary air injection system?
Removing or disabling the secondary air system is illegal in most jurisdictions as it is a required emissions control component. The system should be repaired to maintain compliance.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose P2260?
-
Check B relay control circuit for opens
-
Inspect B wiring for shorts to voltage
-
Test B relay socket
-
Verify ECM B output
Sources 2
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
- Cross-checked against the SAE J2012:2002 DTC table (2026-08-27)archived scan of the SAE standard — readable copy, not SAE’s current edition
Which Vehicles Commonly Get P2260?
- 2008-2018 Toyota Tundra 5.7L
- 2010-2018 Subaru Outback 2.5L
- 2009-2017 Volkswagen Tiguan 2.0T
- 2008-2016 Lexus IS 350 3.5L
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