P0014 on Buick: How to Diagnose & Fix
Exhaust Camshaft Position Timing - Over-Advanced (Bank 1)
1 Buick model · 1 documented issue
P0014 on Buick by model: symptoms, diagnosis and fix
2017-2018 Cascadas with the 1.6L LWC can set a check engine light with P0366 (exhaust camshaft position sensor circuit range/performance) and/or P0014 (exhaust cam timing over-advanced) with no driveability complaint. GM's bulletin 17-NA-338 (October 2017) says the cause is an exhaust cam phaser that sporadically fails to lock and oscillates during engine start, which the ECM misreads as a timing fault. The codes are false; there is no mechanical phaser or timing chain defect, so replacing the phaser, actuator solenoid or cam sensor does not fix it.
Common Symptoms
- Check engine light shortly after a cold start
- P0366 stored
- P0014 stored
- No noticeable running problem
How to Fix
Reprogram the engine control module with the latest calibration via SPS (GM 17-NA-338, listed in the Cascada TSB record as 'ECM update to correct MIL illumination'). Do not replace hardware first. Under the 8yr/80k emissions or bumper-to-bumper warranty the reflash is free; out of warranty a dealer reflash is typically $120-$200. If the codes return after the update, then diagnose the phaser, cam sensor and oil control valve per SI.
Sources for this issue (2)
P0014 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 P0014 mean on a Buick?
P0014 stands for "Exhaust Camshaft Position Timing - Over-Advanced (Bank 1)." P0014 means the exhaust camshaft on bank 1 is timed too far advanced — the variable valve timing (VVT) system has moved the cam beyond the position the computer commanded, or it's stuck in an over-advanced position. The engine uses VVT to rotate the camshaft and optimize valve timing for power, economy, and emissions; the computer compares the commanded cam position to the actual reading from the cam sensor and flags this code when they don't agree. Common results are rough idle, reduced power, poor fuel economy, or a rattle at start-up. Oil flow and the VVT actuator are the usual suspects. On Buick it is documented across 1 model: Cascada.
What are the most common causes of P0014?
The most common causes of P0014 are: Low or dirty engine oil restricting VVT operation, Stuck or failed camshaft oil control valve (VVT solenoid), Clogged VVT solenoid screen or oil passages, Faulty camshaft phaser/actuator, Wiring or connector fault at the oil control valve, Stretched timing chain or jumped timing, Camshaft position sensor fault giving incorrect reading. The specific cause varies by vehicle.
How much does it cost to fix P0014 on a Buick?
Repair costs vary widely with the root cause and Buick model; each issue on this page carries its own estimate where one is published.
Looking for P0014 on a different make?
View P0014 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.