P0324 on Buick
Knock Control System Error
P0324 on Buick vehicles indicates knock control system error. Au7o has documented this code across 1 Buick model — most commonly on Envision. The PCM has detected an internal fault or an implausible input within the knock-control system. The knock control system uses one or more knock (detonation) sensors to listen for combustion knock/ping and lets the PCM retard ignition timing and adjust fueling to prevent detonation. P0324 sets when the module receives an unexpected knock-sensor signal (for example the circuit reading battery voltage, a full ground, or constant electrical noise) or when the internal knock-processing self-test fails, so the PCM can no longer trust its knock detection. Losing knock control can allow damaging detonation and typically causes the PCM to pull timing as a protective default.
Common Causes of P0324
- •Failed knock (detonation) sensor
- •Damaged, corroded, or loose knock sensor wiring, connector, or terminals
- •Short to voltage or short to ground in the knock sensor circuit
- •Excessive engine mechanical noise mimicking knock (worn components) confusing the system
- •Internal PCM / knock-processing fault, or PCM needing a software update
P0324 on Buick by Model
Buick Envision(1 issue)
- Top-End Tick from Soft Hydraulic Lash Adjuster (PIP6101B)2025-2026
GM PIP6101B covers North American 2025-2026 Buick Envision vehicles with the 2.0L LSY engine. Valve-rocker-arm debris can enter a hydraulic valve lash adjuster and keep it from pumping up with oil, leaving the adjuster soft and causing a top-end ticking noise. DTC P0324 may also be present.
Looking for P0324 on a different make?
View P0324 across all makes →Frequently Asked Questions
What does P0324 mean on Buick?▼
P0324 stands for "Knock Control System Error." The PCM has detected an internal fault or an implausible input within the knock-control system. The knock control system uses one or more knock (detonation) sensors to listen for combustion knock/ping and lets the PCM retard ignition timing and adjust fueling to prevent detonation. P0324 sets when the module receives an unexpected knock-sensor signal (for example the circuit reading battery voltage, a full ground, or constant electrical noise) or when the internal knock-processing self-test fails, so the PCM can no longer trust its knock detection. Losing knock control can allow damaging detonation and typically causes the PCM to pull timing as a protective default. On Buick specifically, this code is documented across 1 model.
What causes P0324 on Buick vehicles?▼
Common causes on Buick: Failed knock (detonation) sensor, Damaged, corroded, or loose knock sensor wiring, connector, or terminals, Short to voltage or short to ground in the knock sensor circuit, Excessive engine mechanical noise mimicking knock (worn components) confusing the system, Internal PCM / knock-processing fault, or PCM needing a software update. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0324 on a Buick?▼
Repair costs vary widely depending on the root cause and specific Buick model.
Which Buick models have P0324 documented?▼
Au7o has documented P0324 on 1 Buick model: Envision.