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DTC codes / Ford codes / P1385

P1385 · FordVariable Cam Timing Solenoid B Malfunction

P1385 on Ford vehicles indicates that the powertrain control module (PCM) has detected an electrical or performance fault in the variable cam timing (VCT) solenoid for bank B, which is typically the exhaust cam on the right-hand cylinder head. The PCM monitors the solenoid's command circuit and the resulting camshaft position response, and it sets this code when the solenoid does not actuate as expected or the cam timing does not change within the calibrated range.

SystemPowertrain
Code typeFord specific
SeverityMedium
Fix difficultyIntermediate
AreaIgnition system and misfire

Symptoms you may notice

  • Illumination of the check engine light, often with no other noticeable symptoms
  • Rough idle or intermittent misfire, especially when the engine is cold
  • Reduced engine power and poor acceleration due to incorrect cam timing
  • Decreased fuel economy because the cam phaser cannot optimize valve events
  • A slight rattle or ticking noise from the front of the engine if the solenoid is sticking
  • In some cases, the engine may enter limp mode or exhibit hard starting

Common causes, most likely first

  1. Faulty VCT solenoid B (open or shorted coil, or mechanically stuck spool valve)
  2. Dirty or contaminated engine oil blocking the solenoid's oil passages
  3. Damaged or corroded wiring harness or connector at the VCT solenoid
  4. Failed camshaft phaser or timing chain tensioner causing incorrect cam timing
  5. Low oil pressure or sludge buildup preventing proper phaser operation
  6. PCM software issue or faulty PCM driver for the solenoid circuit

How to diagnose and fix it

  1. Verify oil level and condition; change oil and filter if overdue or contaminated
  2. Inspect the VCT solenoid B connector and wiring for damage, corrosion, or loose pins
  3. Measure the solenoid resistance and compare to factory specification; replace if out of range
  4. Swap the VCT solenoid with a known-good unit from the same bank to see if the code follows
  5. Check oil pressure and inspect oil passages for sludge or blockages
  6. Use a scan tool to command the VCT solenoid and observe camshaft position response
  7. If all electrical and oil-related checks pass, inspect the camshaft phaser and timing chain components

Don't overlook oil condition and phaser wear

  • A sticking VCT solenoid is often caused by dirty engine oil, so a fresh oil change can sometimes clear the code without parts replacement.
  • The code may set intermittently and not illuminate the check engine light until the fault occurs on two consecutive drive cycles.
  • On some Ford engines, a worn timing chain tensioner can mimic a VCT solenoid failure by causing erratic cam timing.
  • After replacing the solenoid, the PCM may need to relearn the cam phaser positions; a scan tool with bidirectional controls is required.
  • A faulty camshaft position sensor can also set P1385 if the PCM cannot verify the commanded cam timing change.

Can I keep driving with P1385?

You can usually drive the vehicle short distances to a repair shop, but avoid heavy acceleration and high speeds because incorrect cam timing can cause engine damage over time. If the engine runs very rough or stalls, stop driving and have it towed.

Tools that help

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Guidance is general and written for Ford vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

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