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Home / DTC / P1532 — B Camshaft Position Actuator Control Open Circuit Bank 2

P1532 — B Camshaft Position Actuator Control Open Circuit Bank 2

Detailed page for trouble code P1532.

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Code

P1532

BMW P — Powertrain

B Camshaft Position Actuator Control Open Circuit Bank 2

Brand: BMW
Type: P — Powertrain
AI status
Completed
ready
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Page language: EN

Causes

  • Open or broken wiring between ECM and camshaft actuator solenoid (bank 2)
  • Corroded or loose connector at the solenoid or ECM
  • Failed camshaft actuator / VANOS solenoid (open coil)
  • Blown fuse or faulty power/ground supply to the solenoid circuit
  • Internal ECM driver fault
  • Contaminated or low engine oil causing solenoid failure (secondary)

Symptoms

  • Check Engine MIL illuminated (P1532 stored)
  • Rough idle or irregular running at idle
  • Reduced engine power or limp-home behavior
  • Decreased fuel economy or hesitation on acceleration
  • Possible cam timing related misfire or roughness under load

What to check

  • Retrieve freeze frame and live data with a BMW-capable scanner; confirm P1532 and check related cam timing codes
  • Visually inspect solenoid connector and wiring harness on bank 2 for damage, corrosion, or oil intrusion
  • Check fuses and power/ground for the camshaft actuator circuit
  • Backprobe the solenoid connector with key ON (engine OFF) and measure battery voltage and ground presence
  • Measure solenoid coil resistance and continuity to the ECM
  • Use an oscilloscope or scan tool to check for PWM control signal from ECM while cranking/running (if available)

Signal parameters

  • Supply voltage to solenoid: approx. battery voltage with ignition ON (8–14 V expected)
  • Solenoid coil resistance (typical range): approx. 4–30 ohms (varies by model) — expect continuity, not open
  • Control method: ECM uses PWM or switched ground to modulate actuator (duty cycle 0–100%)
  • Control frequency: typically low hundreds of Hz for PWM-driven solenoids (varies by model)
  • Open-circuit condition: infinite / very high resistance or no voltage change when commanded

Diagnostic algorithm

  1. Read and record stored codes and freeze-frame data; check for related cam/crank position codes (P00xx/P03xx).
  2. Visually inspect the bank 2 camshaft actuator solenoid connector and wiring for damage, oil intrusion, or corrosion; repair as needed.
  3. With ignition ON (engine OFF) backprobe the connector: verify battery voltage on the power feed and a good ground reference.
  4. Measure solenoid coil resistance at the connector (or removed solenoid). If open/infinite, replace the solenoid.
  5. If coil resistance is normal, command the solenoid with a scan tool while monitoring voltage or use an oscilloscope to verify control PWM/switching from the ECM.
  6. Check continuity between the solenoid connector and the ECM pins to rule out wiring open circuits; repair any opens or shorts to ground/battery.
  7. Inspect/replace related fuse(s) and confirm power/ground circuits are good.
  8. If wiring and solenoid are good but no control signal from ECM, consider ECM driver fault — verify with manufacturer diagnostic procedures before replacing ECM.
  9. After repair, clear codes and perform a road test to verify proper operation and that code does not return.

Likely causes

  • Damaged/broken wire or poor connector at the solenoid (most common)
  • Failed solenoid (coil open)
  • Blown fuse or missing power/ground
  • ECM output driver fault (less common)
  • Oil contamination causing solenoid seizure (less likely but possible)

Fault status

⚠️ Status
B Camshaft Position Actuator Control - Open Circuit (Bank 2). Check solenoid wiring, connector, power/ground and actuator for open circuit.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

P1531 P0011 P0014 P0021 P0024 P0340
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