P1381 on Acura: How to Diagnose & Fix
Variable Cam Timing Over-Advanced (Bank 1)
1 Acura model · 1 documented issue · 1 critical · $250-$600 repair
P1381 on Acura by model: symptoms, diagnosis and fix
The TEC/Hitachi internal-coil distributor on third-generation Integras is a chronic failure point. Heat from the internal ignition coil degrades the coil, igniter (ICM), and bearings, causing intermittent stalling at operating temperature, hot-restart problems, and dead no-starts. The 1996 Acura Integra has the most overall complaints, with the most-reported problem being distributor failure. This issue can cause difficulty starting the car, stalling, and misfiring. The car has been in the shop because the driver was driving and it just shut off with no warning or light. Come to find out it was the distributor so they changed it.
Common Symptoms
- engine stalls while driving
- hot no-start
- intermittent misfire
- check engine light
- rough idle when warm
- engine cuts out and restarts
How to Fix
Pull DTCs first — codes P1381 (cylinder position sensor) and Code 22 commonly originate inside the distributor. P1381 is the cylinder position sensor code, located inside the distributor. Replace the complete OEM distributor assembly (avoid cheap aftermarket — many fail within months). OBD1 (94-95) and OBD2 (96-99) distributors are not interchangeable. It is worth noting that the distributor plugs are different for each obd generation. So the obd1, and obd2 have different harness plugs. Budget $250-550 for a quality unit installed.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Non-VTEC 1994–1999
Approved replacement: Non-VTEC 1994–1999 (verify TD-85U/connector).
- GS-R 1994–1995Fits 1994-1995
Verified repair component. Approved replacement: GS-R 1994–1995.
- GS-R 1996–1999 / Type R 1998–1999, 9-pinFits 1996-1999
Verified repair component. Approved replacement: GS-R 1996–1999 / Type R 1998–1999, 9-pin.
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
Owner tips & cautions
- TipMark the distributor housing position before removal so you can return to base timing without a timing light.
Sources for this issue (2)
P1381 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P1381 mean on a Acura?
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 Acura it is documented across 1 model: Integra.
What are the most common causes of P1381?
The most common causes of P1381 are: 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. The specific cause varies by vehicle.
How much does it cost to fix P1381 on a Acura?
Published repair estimates on Acura range from $250 to $600 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for P1381 on a different make?
View P1381 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.