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Home / DTC / P2435 — AIR System Air Flow/Pressure Sensor Circuit Bank 2

P2435 — AIR System Air Flow/Pressure Sensor Circuit Bank 2

Detailed page for trouble code P2435.

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Code

P2435

Generic P — Powertrain

AIR System Air Flow/Pressure Sensor Circuit Bank 2

Brand: Generic
Type: P — Powertrain
Views: UK: 13 EN: 31 RU: 15
AI status
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ready
Completed 100%
Page language: EN

Causes

  • Faulty air flow/pressure sensor (bank 2)
  • Open or shorted wiring in sensor signal, power, or ground circuit
  • Corroded, loose, or damaged connector at the sensor
  • Failed secondary air injection (AIR) pump, valve, or check valve causing abnormal pressure/flow
  • Blocked or collapsed air hoses or passages in the AIR system
  • Poor ground or insufficient reference/5V supply from ECM

Symptoms

  • Check Engine Light (MIL) illuminated
  • Possible reduced or disabled secondary air injection operation
  • Rough idle or driveability problems if AIR system affects mixture control
  • Distinct mechanical noise from failed AIR pump (whine/grind) in some vehicles
  • Stored freeze-frame data showing conditions when fault was set

What to check

  • Read and record freeze-frame and freeze data, and confirm active/confirming status of P2435
  • Perform visual inspection of sensor, connectors, wiring harness, AIR pump, valves and hoses on bank 2
  • Check and record reference supply (usually 5V) and ground at the sensor connector with key ON
  • Backprobe sensor signal wire; measure voltage with engine running/at key ON and while activating AIR system
  • Wiggle test wiring and connector while observing live data for intermittent changes
  • Inspect/verify AIR pump operation, check valves and passages for blockage

Signal parameters

  • Typical sensor signal: 0–5 V analog (varies by manufacturer). Expect a mid-range voltage at key ON (e.g., ~0.5–4.5 V) and a changing voltage proportional to pressure/flow when AIR system is active
  • Open-circuit: signal ~0 V or no change
  • Short-to-power: signal near battery voltage (~12 V) or fixed high value
  • Short-to-ground: signal near 0 V or fixed low value
  • If sensor is a switched/frequency output, expect a pulsed waveform; consult vehicle-specific manual for frequency and duty-cycle values

Diagnostic algorithm

  1. Verify the code and obtain freeze-frame/live data. Confirm symptoms and whether code is current or historical.
  2. Visually inspect the bank 2 AIR flow/pressure sensor, connector and harness for damage, corrosion, pin push-out, or contamination.
  3. With key ON (engine OFF), backprobe the sensor connector: verify reference voltage (typically 5V), ground continuity, and signal voltage. Record values.
  4. Start engine or activate AIR system (if service-safe) and observe signal change. A static or absent signal suggests open/short; an erratic signal suggests intermittent wiring or faulty sensor.
  5. If signal abnormal, perform continuity and resistance checks from sensor connector to ECM pins to locate open or short. Repair any wiring faults.
  6. If wiring good, bench-test or substitute a known-good sensor (if available) and re-check system behavior and live data.
  7. Inspect secondary air pump, check valves and hoses for mechanical restriction or failure that could drive the sensor out of normal range. Repair or replace as needed.
  8. Clear codes and perform road/functional test to confirm repair. If code returns and wiring and sensor verified good, consider ECM input/driver fault and consult OEM diagnostic procedures.

Likely causes

  • Damaged sensor harness or pin corrosion at the connector
  • Sensor electrically failed (intermittent or out-of-spec output)
  • Connector contamination or water intrusion
  • Blocked AIR pump outlet, failed check valve or stuck valve producing unexpected pressure
  • Blown fuse or relay supplying the AIR pump or sensor circuit

Fault status

⚠️ Status
P2435 — AIR System Air Flow/Pressure Sensor Circuit Bank 2. Fault detected in the air flow/pressure sensor circuit on bank 2 (open, short, out-of-range, or erratic signal).
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

Similar codes

P2436 P0410 P0411 P0412 P0101
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