2012 Buick Verano engine problems

Engine consumes far more oil than normal operation should require. Owners consistently report dipsticks reading empty or nearly empty despite following the manufacturer's recommended oil change intervals. The consumption rate varies but many owners report 2-4 quarts lost every 1,000-2,500 miles. Oil monitoring systems fail to alert owners to the low oil condition until it is severe or too late.

When: Occurs across a wide range of mileages from under 50,000 to over 115,000 miles. Multiple owners report the problem becoming noticeable between 42,000-80,000 miles, though some experience it earlier.

Symptoms owners cite: Dipstick reading empty or nearly empty between scheduled oil changes; Oil monitor displaying sufficient oil life remaining when actual oil level is critically low; No illumination of low oil warning light despite severe depletion; Rough engine idling; Engine hesitation during acceleration; Loud tapping or pinging noise from the engine; Dark, thick, black oil appearing very quickly after oil changes

Codes mentioned: P0014 - Camshaft position actuator solenoid (consequence of excessive oil consumption)

Repairs/costs cited: Multiple owners report mechanics diagnosing faulty pistons and piston rings as the root cause. Repair options cited include piston and ring replacement or full engine replacement. One owner reports $700+ in damage repairs caused by low oil conditions. Another mentions $2,000 cost for piston and ring work. One owner reports a $450 fee for excessive carbon buildup cleaning.

Recalls/TSBs owners mention: Technical Service Bulletin #13-06-01-003H issued by GM acknowledges the excessive oil consumption defect affecting multiple 2.4L engine models including the 2012 Verano. Sanchez et al v. General Motors LLC class action suit found in favor of plaintiffs regarding the oil consumption defect. Despite TSB documentation and class action findings, GM has not issued a recall for the 2012 Verano. Owners report GM customer service denying the issue exists even when service records show multiple visits for excessive oil consumption.

Check engine light illuminates repeatedly, typically with fault code P0014 for camshaft position actuator solenoid or sensor malfunction. One owner reports this code appearing at least three separate times across a 40,000+ mile span. Failures appear correlated with or exacerbated by the excessive oil consumption issue, as low oil conditions accelerate wear on timing and valve system components.

When: First occurrence reported around 49,000 miles, with recurrences at 82,000 miles and again at 92,000 miles in the same vehicle. Another owner reports failure at approximately 81,207 miles.

Symptoms owners cite: Check engine light illumination; Rough idling; Engine stalling during acceleration or at low speeds; Vehicle blocking roadway when stalled; Funny tapping or knocking noise during acceleration and deceleration

Codes mentioned: P0014 - Camshaft Position Actuator Solenoid / Sensor

Repairs/costs cited: Dealership and independent mechanics replaced valve position solenoids (two units replaced in one case for $212). One owner mentions timing kit and water pump replacement for loose chains performed by a dealership mechanic. Despite replacement, the problem recurred in the same vehicle multiple times, suggesting an underlying cause was not addressed.

Recalls/TSBs owners mention: No TSBs or recalls specifically addressing this failure mode in 2012 Verano narratives. One owner references Service Bulletin #13-06-01-003H but notes it focuses on oil consumption rather than the solenoid issue. GM case number SR 9-5484491631 was generated for one complaint involving camshaft solenoid failure.

Engine suddenly stalls without warning while driving at various speeds, from highway speeds (70 mph) to city driving (5-35 mph). Stalling occurs sporadically and repeatedly in the same vehicle. Most vehicles can be restarted after waiting 1-5 minutes, though some do not restart. The stalling creates serious safety hazards, leaving vehicles stranded in traffic or crossing lanes.

When: Reported across mileages from 7,000 miles (brand new vehicle with ~600 miles) to 112,000+ miles. Multiple owners report first stall incidents occurring between 34,000-68,000 miles.

Symptoms owners cite: Engine suddenly shuts off without warning while driving; Engine becomes very rough when stalling occurs; Vehicle cannot exceed 10 mph for 1-2 minutes during stall event; Check engine light illuminates (misfire codes noted); Engine operates normally 5-10 minutes after restart; Engine sounds like it is misfiring

Codes mentioned: P0010 - Timing system error / Camshaft Position 'A' circuit, Misfire codes (unspecified in narratives)

Repairs/costs cited: Dealers attempted diagnosis but often could not replicate or identify the cause. One dealer suspected bad fuel and drained/replaced fuel, but stalling continued immediately after. One dealer replaced an unspecified engine part without success; subsequent oil consumption test revealed nearly empty oil level. No successful permanent repairs reported in the narratives.

Recalls/TSBs owners mention: No recalls or TSBs specifically addressing sudden stalling are mentioned. Manufacturers notified in some cases but did not provide remedies. OnStar diagnostic indicated timing system issue in one case.

The onboard oil level monitoring system fails to warn owners of critically low oil levels. Owners report the oil life monitor displaying 50-70% remaining oil life when the actual dipstick shows the tank is empty or nearly empty. The low oil warning light does not illuminate until the oil level is so depleted the engine is already sustaining damage or is about to fail. This system defect prevents owners from taking corrective action and directly enables catastrophic engine damage.

When: Documented across mileages from 42,000 to 176,768 miles, with most reports occurring between 48,000-92,000 miles.

Symptoms owners cite: Oil life monitor reading 50-70% oil life remaining while dipstick is empty; No low oil warning light illumination despite severe oil depletion; Owner discovers empty dipstick only during routine manual checking; Engine already making noise or showing rough running when low oil is finally discovered

Repairs/costs cited: No repairs to the monitoring system are documented in the narratives. The issue is acknowledged but not corrected. Owners are forced to manually check dipstick levels frequently to compensate.

Recalls/TSBs owners mention: GM's Technical Service Bulletin #13-06-01-003H acknowledges that 'Reliance on the [system] instead encourages owners to drive with a false sense of security' and notes that oil monitoring systems are defective. Despite this acknowledgment, no fix has been provided to 2012 Verano owners.

Low oil conditions cause audible engine noise including loud pinging, tapping, rumbling, and knocking sounds. Owners report hearing these noises weeks before discovering the oil level is critically low. In several cases, the noises are the only warning owners receive because the low oil light does not function. Continued driving with low oil causes piston, rod, and valve timing system damage.

When: Reported at various mileages from 72,000 to 176,768 miles. One owner reports loud tapping at 92,000 miles concurrent with nearly empty oil level.

Symptoms owners cite: Loud pinging noise from engine; Loud tapping noise during acceleration and deceleration; Loud rumbling sound signaling need for oil top-off; Tapping noise weeks before severe oil depletion discovered; Engine rod knock (hole punched through engine block in one case)

Repairs/costs cited: One owner reports timing belt breaking and head gasket collapsing due to low oil. Another reports engine rods punching holes in the aluminum engine block. Piston and ring replacements performed in multiple cases. No simple repair exists once mechanical damage occurs; full engine replacement may be necessary.

Recalls/TSBs owners mention: No manufacturer response documented. One owner notes that recalls exist for this issue on other GM vehicles with the same 2.4L engine, but the 2012 Verano is not included.