P0024 on Chevrolet: How to Diagnose & Fix
Exhaust Camshaft Position Timing - Over-Advanced or System Performance (Bank 2)
1 Chevrolet model · 1 documented issue · $150-$900 repair
P0024 on Chevrolet by model: symptoms, diagnosis and fix
The second-generation 3.6L LFY runs four cam phasers fed by oil-control solenoids. On early C1XX Traverse builds the solenoids stick or screen-clog with casting/machining debris and varnish, and the ECM calibration was itself part of the problem. The result is a set of correlated cam timing codes — commonly P0011 with P0014, P0021 and P0024 appearing together — plus a rough idle, a rattle on start-up as the phasers fail to lock, and reduced power. On 2018 models GM addressed the calibration side with Service Update N192266190, an ECM reprogram for an engine-control software issue during auto stop/start events that could cause rough running, reduced power or a stall with P0011/P0014/P0021/P0024. This is distinct from the LLT/LFX timing chain stretch problem: the chains here are not necessarily worn, the phaser control is.
Common Symptoms
- Check engine light
- Rough or unstable idle
- Rattle on cold start-up
- Reduced engine power
- Hesitation on acceleration
How to Fix
Start with a known-good oil and filter service using dexos1 5W-30 full synthetic — degraded or overfilled oil alone will set these codes on this engine. On a 2018 model, check with a dealer whether Service Update N192266190 (ECM reprogram) is open for the VIN; the reprogram resolves a meaningful share of cases at no parts cost. If codes persist after the reflash, test the cam actuator solenoids for correct resistance and replace the affected solenoid(s) and screens; heavily varnished engines may need the phasers themselves. Only after solenoid and oiling causes are excluded should chain stretch be suspected — and verify it with an actual cam/crank correlation measurement, not an assumption.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Camshaft position actuator (VVT) solenoid valve — 3.6L LFY (one part number serves all four intake/exhaust positions; reOEM12636175Cross-refDorman 917-219, SKP SK917219, Gates VVS (see RockAuto/eBay Gates listing for Traverse 3.6L$35–$60
GM 12636175 is the long-running 3.6L HFV6 cam-phaser oil-control solenoid and remains the catalogued number for the 2018-2020 (and later) Traverse 3.6L LFY; GM catalog listings span 2004-2025. Sold individually — the LFY uses four (2 int…
- Engine oil filter — 3.6L LFY (for the dexos1 5W-30 full-synthetic oil and filter service that is step one of the fix)OEM12731742Cross-refACDelco PF63E (GM 12690385), ACDelco PF63 (GM 12707246 / 89017525), GM 12690385 (superseded to 12731742)$6–$15
The 2018-2019 Traverse 2.0T uses a different filter (19417843/25206377/12699847) — do not cross.
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Sources for this issue (3)
P0024 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 P0024 mean on a Chevrolet?
P0024 stands for "Exhaust Camshaft Position Timing - Over-Advanced or System Performance (Bank 2)." This code means the exhaust camshaft on Bank 2 is timed more advanced (earlier) than the computer commanded. The variable valve timing system uses an oil-pressure-driven cam phaser and a control solenoid to set camshaft position; the computer compares the commanded position to the actual measured position. When the exhaust cam on Bank 2 reads too far advanced, P0024 sets. Bank 2 is the side of the engine not containing cylinder number one. Symptoms can include rough idle, reduced power, and poor fuel economy. On Chevrolet it is documented across 1 model: Traverse.
What are the most common causes of P0024?
The most common causes of P0024 are: Stuck-open or clogged variable valve timing (oil control) solenoid, Low or dirty engine oil, Failed exhaust camshaft phaser/actuator (Bank 2), Clogged oil control valve screen or oil passages, Stretched or worn timing chain, Wiring or connector fault at the VVT solenoid, Incorrect cam timing from prior service, Faulty PCM/ECM (rare). The specific cause varies by vehicle.
How much does it cost to fix P0024 on a Chevrolet?
Published repair estimates on Chevrolet range from $150 to $900 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.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.