P2442
Secondary Air Injection System Switching Valve Stuck Open Bank 2
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The P2442 code is the Bank 2 equivalent of P2440, meaning the secondary air injection system switching valve for Bank 2 (the side of the engine that does not contain cylinder 1) is stuck in the open position. This valve should only open during cold starts, but it is remaining open at all times.
Symptoms are similar to P2440 — you may hear a hissing noise, experience a rough idle, and the Bank 2 oxygen sensors may read lean because extra air is being pushed into the exhaust when it should not be. This can cause the PCM to adjust fuel delivery incorrectly, potentially affecting engine performance and fuel economy.
On V-type engines (V6, V8), Bank 2 is typically the opposite side from Bank 1, and on many vehicles the Bank 2 components are harder to access. This often makes the repair more labor-intensive and expensive compared to Bank 1. The parts cost is similar to Bank 1 repairs. If you are getting both P2440 and P2442, it may be more cost-effective to replace both switching valves at the same time to save on labor. This is a common issue on Toyota Tundra, Sequoia, and Lexus models.
Severity
Symptoms
- •Check Engine Light is on
- •Hissing or whistling noise from engine area
- •Rough idle especially during warm-up
- •Lean running condition detected by Bank 2 oxygen sensors
- •Failed emissions test
- •Potential exhaust odor in engine compartment
Likely Causes
The Bank 2 switching valve has mechanically failed open due to carbon buildup, corrosion, or internal spring failure.
The solenoid for the Bank 2 valve is stuck energized or has an internal failure keeping the valve open.
Exhaust carbon deposits have built up on the valve seat, preventing the switching valve from closing completely.
A cracked or disconnected vacuum line keeps the Bank 2 valve actuated open.
A wiring short keeps the solenoid energized, holding the valve open continuously.
Estimated Cost
Professional Repair
Includes parts + labor
Common Fixes
- Replace secondary air injection switching valve Bank 2
- Replace air switching valve solenoid
- Clean carbon deposits from valve and seat
- Repair or replace vacuum lines
- Repair short circuit in solenoid wiring
Shop Parts
Videos
✅P2442 Engine Code Easy Fix Secondary Air Injection Check Valve Replacement | 2012 Toyota Tundra 4.6
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2012 Toyota Tacoma p2440 & p2442 Secondary Air Injection Valve fix part 1 Overview
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Toyota Tundra Air System Switching Valve Stuck Open Bank 2 - Code P2442 Step-by-Step Replacement
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