P1381 on Honda
Variable Cam Timing Over-Advanced (Bank 1)
P1381 on Honda vehicles indicates variable cam timing over-advanced (bank 1). Au7o has documented this code across 3 Honda models — most commonly on Civic, del Sol, Prelude. This manufacturer-specific code (most common on Ford/Lincoln/Mazda) means the engine computer detected that the Variable Cam Timing (VCT) on cylinder bank 1 has advanced beyond the allowed range, often alongside a detected misfire. Variable cam timing adjusts when the valves open and close to optimize power, economy, and emissions, and it relies on clean engine oil and a working solenoid. When timing drifts too far advanced, the engine can run rough and lose power. It is usually an oil-flow or solenoid issue rather than a sign the engine is destroyed. Typical repair costs on Honda range from $60 to $600, depending on the specific model and root cause.
Common Causes of P1381
- •Dirty or low engine oil restricting the VCT solenoid
- •Faulty or stuck variable cam timing (VCT) solenoid
- •Worn or stretched timing chain / guides
- •Faulty camshaft position sensor
- •Low engine oil pressure
- •Clogged oil passages or VCT actuator (phaser)
- •Wiring or connector fault at the VCT solenoid
P1381 on Honda by Model
Honda Civic(1 issue)
- Internal distributor failure (ignitor/ICM, coil, and oil-seal leak) causing misfire and hot no-start1992-1999
1990s Civics use a distributor housing the ignition coil, ignitor/ICM, and pickup sensors. The ignitor commonly fails (the coil rarely does), producing intermittent hot no-start and misfires. A separate frequent problem is the internal distributor oil seal leaking, which lets oil contaminate the electronics and cap. Honda sourced these distributors from TEC and Hitachi.
Honda del Sol(1 issue)
- Distributor Internal Oil Seal / Bearing Failure1993-1997
The del Sol's cam-driven ignition distributor (mounted on the cylinder head) has an internal shaft oil seal that hardens and leaks with age. Engine oil migrates past the seal and coats the cap, rotor, igniter, and internal sensors, causing misfires, rough running, and stalling. The distributor shaft bearing also wears, and internal sensors such as the CYP (cylinder position) sensor can fail (setting P1381/P1382). The 1994-1995 cars are widely cited for this leak, though it affects the full 1993-1997 range. A known secondary hazard: leaking oil drips onto the heater hose below and can degrade it.
Honda Prelude(1 issue)
- H22/H23 distributor failure (TDC/cylinder-position sensor and internal bearing)1993-2001
The single most common driveability failure on the VTEC Prelude is the internal distributor. Two failure modes dominate: the internal sensors (TDC / cylinder position, or CYP) degrade, and the distributor shaft bearing wears out and 'spins,' contaminating the housing (owners describe a tell-tale reddish powder inside). The ignition/rotor also burns the cap center lead over time. As the bearing fails, shaft play produces bad CYP readings and oil can enter the cap, causing misfires and no-starts. On OBD-II 5th-gen cars this throws a cylinder-position-sensor code (historically 'code 9' on OBD-I). Because Honda integrated the sensors, coil, cap, rotor and ignitor into one distributor unit, a single worn part causes wide-ranging symptoms and is frequently misdiagnosed as fuel, plugs, or wires.
Looking for P1381 on a different make?
View P1381 across all makes →Frequently Asked Questions
What does P1381 mean on Honda?▼
P1381 stands for "Variable Cam Timing Over-Advanced (Bank 1)." This manufacturer-specific code (most common on Ford/Lincoln/Mazda) means the engine computer detected that the Variable Cam Timing (VCT) on cylinder bank 1 has advanced beyond the allowed range, often alongside a detected misfire. Variable cam timing adjusts when the valves open and close to optimize power, economy, and emissions, and it relies on clean engine oil and a working solenoid. When timing drifts too far advanced, the engine can run rough and lose power. It is usually an oil-flow or solenoid issue rather than a sign the engine is destroyed. On Honda specifically, this code is documented across 3 models.
What causes P1381 on Honda vehicles?▼
Common causes on Honda: Dirty or low engine oil restricting the VCT solenoid, Faulty or stuck variable cam timing (VCT) solenoid, Worn or stretched timing chain / guides, Faulty camshaft position sensor, Low engine oil pressure. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P1381 on a Honda?▼
Repair costs on Honda range from $60 to $600, depending on the specific model and root cause.
Which Honda models have P1381 documented?▼
Au7o has documented P1381 on 3 Honda models: Civic, del Sol, Prelude.