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Home / DTC / P2260 — AIR System Control B Circuit High

P2260 — AIR System Control B Circuit High

Detailed page for trouble code P2260.

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Code

P2260

Generic P — Powertrain

AIR System Control B Circuit High

Brand: Generic
Type: P — Powertrain
Views: UK: 19 EN: 36 RU: 28
AI status
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Page language: EN

Causes

  • Short to battery voltage on the AIR B control circuit
  • Open or high-resistance ground or control driver in the ECU
  • Damaged, corroded or loose connector or pins at the solenoid
  • Failed AIR system solenoid/valve (internal short or shorted coil)
  • Wiring damage (chafing, pinched, melted insulation)
  • Previous repairs with incorrect connector or wiring routing

Symptoms

  • Check Engine MIL illuminated (P2260 stored)
  • Reduced engine performance or limp mode in some vehicles
  • Rough idle or hesitation during acceleration
  • Erratic secondary air injection operation (if equipped)
  • Possible increase in exhaust emissions or failed emissions test

What to check

  • Scan for P2260 and any related codes; record freeze-frame data and pending codes
  • Visual inspection of AIR solenoid B connector, wiring harness, and routing for damage or corrosion
  • Backprobe solenoid connector and measure voltage with key ON and engine running
  • Measure coil resistance of AIR solenoid B with connector disconnected
  • Command AIR B ON/OFF (if scanner supports) while observing voltage and response
  • Inspect grounds and battery feed circuits for continuity and proper crimps

Signal parameters

  • Expected supply voltage at solenoid feed: ~11–14 V (battery voltage) with key ON
  • Expected control voltage at solenoid control pin: pulsed/ground-switched by ECU; when commanded ON, circuit should be near 0–1 V (ground); when OFF, near supply or open depending on design
  • Typical AIR solenoid coil resistance (generic): about 15–60 ohms (vehicle-specific — consult service data)
  • PWM control frequency often in the 10–200 Hz range (vehicle-specific)
  • Fault condition: control circuit measures higher-than-expected voltage (close to battery) when ECU expects a low/grounded state

Diagnostic algorithm

  1. Verify code and related codes: Connect a scan tool, read P2260 and freeze frame. Note conditions (RPM, temp, engine load).
  2. Visual inspection: With engine off, inspect the AIR B solenoid, connector, and nearby wiring for damage, corrosion, or disconnected terminals.
  3. Check connector: Disconnect solenoid connector and inspect terminals for corrosion, pushed-out pins, or melted plastic. Repair as needed.
  4. Measure coil resistance: With solenoid unplugged, measure coil resistance across its two terminals. Compare to the vehicle specification (generic range 15–60 ohms). A near-infinite or very high reading = open coil; near-zero = short.
  5. Backprobe supply and control: Reconnect and backprobe connector. With key ON engine OFF, verify supply (battery) voltage at feed pin and measure control pin. Control pin should be high (open) or pulsed; when commanded ON by scan tool it should be pulled to ground (~0–1 V).
  6. Command test: Using a bidirectional scan tool, command AIR B ON/OFF while observing voltage and verifying solenoid activation (audible click or pressure change if accessible). If commanded ON and control voltage stays high, suspect wiring short to battery or ECU driver fault.
  7. Check for short to voltage: With ignition OFF, disconnect connector and measure resistance from control pin to battery positive; a low resistance indicates short to battery.
  8. Check ground and continuity: Verify continuity from the solenoid ground to chassis/ECM ground. Repair poor ground connections.
  9. Wiggle test and inspect harness under load: Look for intermittent shorts or opens with harness movement while monitoring live data.
  10. Isolate component: If wiring and connector test good, swap AIR B solenoid with a known-good unit (if available) or bench-test the solenoid by applying proper voltage/ground to confirm operation.
  11. ECM check: If wiring and the solenoid bench test OK, suspect ECM driver failure. Confirm with manufacturer diagnostics before replacing ECM.
  12. Clear codes and road test: After repairs, clear codes, run the vehicle through the same conditions that set the code, and verify the code does not return.

Likely causes

  • Corroded or pushed-out terminal at the solenoid connector causing intermittent high voltage reading
  • Wiring shorted to constant 12V (rub-through to harness power feed)
  • Solenoid coil internally shorted to battery
  • Open/weak ground at ECM or in harness causing the driver to read high
  • Connector contamination (oil/water) raising circuit voltage

Fault status

⚠️ Status
P2260 - AIR System Control B Circuit High: Voltage on the AIR B control circuit is higher than expected. Inspect wiring, connectors, and the AIR B solenoid; check ECM output.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0236 P0238 P0299 P0106 P0107 P2261
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