The 2015 Volt is a plug-in hybrid with a solid electric drivetrain but a problematic 1.4L range-extender engine that suffers catastrophic internal failures, plus transmission cooling and mount issues common to the Voltec platform.
1.4L Range Extender Engine Internal Failure (Pistons, Rings, Bearings)
Occasional · high severity
Typical onset: 80,000-140,000 mi
Symptoms: Excessive oil consumption (quart every 500-1000 miles), Rough running or misfires when engine kicks on, Metal shavings in oil, Catastrophic knock or seized engine, Check engine light with misfire codes P0300-P0304
Fix: The 1.4L Ecotec in range-extender duty develops piston ring wear, scoring, and bearing failures. Many require complete short block replacement or engine rebuild with pistons, rings, bearings, and sometimes crankshaft work. Figure 16-24 labor hours for short block swap, more for full rebuild. GM extended warranty covered some early failures but most 2015s are out of coverage now.
Estimated cost: $4,500-8,500
Transmission Oil Cooler Failure and Leaks
Common · medium severity
Typical onset: 60,000-110,000 mi
Symptoms: Transmission fluid puddles under vehicle, Reduced electric range due to overheating protection, Transmission overheat warnings on DIC, Pink or red fluid visible near radiator area
Fix: The Voltec transaxle uses an integrated oil cooler that develops leaks at seals or cracks at mounting points. Requires removing the transaxle to replace cooler and seals. Labor-intensive due to battery pack and electric motor layout. 8-12 hours labor depending on shop familiarity with Volt platform.
Estimated cost: $1,800-3,200
Drive Unit (Transmission) Mount Failure
Common · medium severity
Typical onset: 70,000-120,000 mi
Symptoms: Clunking when shifting from Park to Drive/Reverse, Vibration at idle or acceleration, Visible sagging of transaxle on driver side, Excessive drivetrain movement over bumps
Fix: The main drive unit mount (essentially a transmission mount) wears and tears, especially on the hydraulic side mount. Requires lifting powertrain slightly to replace. 2-4 hours labor. OEM mount recommended as aftermarket versions fail prematurely.
Estimated cost: $400-750
High-Voltage Battery Degradation and Cell Imbalance
Occasional · medium severity
Typical onset: 100,000-150,000 mi
Symptoms: Significant loss of electric range (below 25 miles on full charge), Propulsion power reduced messages, Frequent range extender activation, Battery capacity below 60% on diagnostic scan
Fix: The 17.1 kWh lithium-ion pack degrades over time and charge cycles. Some cells fail or become imbalanced. Full pack replacement is dealer-only and extremely expensive. Some independent shops can replace individual modules (2 bad sections common) for 6-10 hours labor, but parts sourcing is difficult.
Estimated cost: $2,000-4,000 for module replacement, $8,000-12,000+ for full pack
Fuel System Issues (Stale Fuel, Injector/Filter Problems)
Occasional · low severity
Symptoms: Hard starting when engine tries to run, Rough idle or stalling during range-extender operation, Fuel system lean codes P0171/P0174, Engine runs poorly after sitting for months
Fix: Volts driven primarily on electric often have fuel sit for 6-12 months, leading to varnish buildup, clogged filters, and injector fouling. The fuel maintenance mode tries to prevent this but isn't always enough. Requires fuel system cleaning, filter replacement (inside tank), sometimes injectors. Tank drop for filter: 3-5 hours.
Estimated cost: $400-1,200
Steering Power Assist Fault (NHTSA Recall 15V-412)
Rare · high severity
Symptoms: Sudden loss of power steering assist, Heavy steering wheel, Service power steering message, No warning before failure
Fix: Covered under recall 15V-412 for electric power steering control module software update. If already performed and still failing, module replacement required: 1.5-2 hours labor. Verify recall completion before purchase.
Estimated cost: $0 if recall work, $600-900 if out-of-pocket
Charge Port Door Actuator Failure
Occasional · low severity
Typical onset: 50,000-100,000 mi
Symptoms: Charge door won't open with button press, Door opens but won't close, Grinding noise from door area, Manual release cable required to access port
Fix: The motorized charge door actuator mechanism fails from repeated cycling. Simple replacement: remove inner fender liner, swap actuator. 1-1.5 hours labor.
Estimated cost: $250-450
Owner tips
Run the range extender engine monthly for 15-20 minutes even if you don't need it — prevents fuel system varnish and keeps engine seals lubricated
Monitor oil consumption closely on the 1.4L; catching piston ring wear early can prevent catastrophic bearing failure
Use fuel stabilizer if you know the car will sit on electric-only for extended periods
Check transmission mount condition during routine service; catching it early prevents damage to CV axles and cooler lines
Verify NHTSA recall 15V-412 (power steering) was completed before purchase
Buy only if the range-extender engine has documented oil consumption history showing less than 1 quart per 2,000 miles and all recalls are complete; budget $2,000-3,000 for likely mount and cooler repairs.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.
Fitment notes: Located in rear cargo area; AGM required for start-stop system; smaller auxiliary 12V battery for range extender engine
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Every control module on the 2011-2015 Chevrolet Volt — where it lives, replacement time, and what it takes to program a replacement. Modules marked dealer / factory tool won't work after a part swap alone — budget for programming.
Electric Power Steering Control Module (EPSCM)2.5 hr R&Rdealer / factory tool +0.5 hr▸ programming details
📍 Integrated with steering column assembly, below instrument panel
🔧 GM SPS2 via GDS2/MDI
⚠️ Steering angle sensor calibration required after replacement
Body Control Module (BCM)2.0 hr R&Rdealer / factory tool +0.8 hr▸ programming details
📍 Behind center stack, above transmission tunnel
🔧 GM SPS2 via GDS2/MDI
⚠️ VIN programming and theft deterrent relearn required
Remote Control Door Lock Receiver (RCDLR)0.8 hr R&Rdealer / factory tool +0.3 hr▸ programming details
📍 Behind rear interior trim, driver side
🔧 GM SPS2 via GDS2/MDI
⚠️ Key fob programming required
Park Assist Control Module (PACM)0.8 hr R&Rrelearn only +0.2 hrwith rear park assist▸ programming details
📍 Behind rear bumper cover, center
🔧 Basic scan tool for sensor calibration
Rear Vision Camera Module (RVCM)0.5 hr R&Rno codingwith rear vision camera
📍 Integrated with rear liftgate handle assembly
Headlamp Control Module (HCM)0.5 hr R&Rno coding▸ programming details
📍 Engine compartment, behind driver side headlamp assembly
Aftermarket tool coverage varies by software version and vehicle build — treat "aftermarket tool" rows as "usually possible" and verify against your tool maker's coverage list before promising a customer. Spot a wrong location or hour? Tell us — corrections ship fast here.
General Motors LLC (GM) is recalling certain model year 2014-2015 Chevrolet Cruze vehicles manufactured November 8, 2013, to March 12, 2015, and 2015 Chevrolet Volt vehicles manufactured April 11, 2014. In the affected vehicles, the inner tie rod may not be tightened to specification allowing the tie rod to separate from the steering gear.
Consequence: Separation of the tie rod from the steering gear could result in the loss of steering, increasing the risk of a crash.
Remedy: GM will notify owners, and dealers will replace the steering gear assembly, free of charge. The recall began on July 28, 2015. Owners may contact Chevrolet customer service at 1-800-222-1020. GM's number for this recall is 15386.
Fuel economy (EPA)
City
35mpg
Highway
40mpg
Combined
37mpg
Fuel
Premium Gasoline
Capability & size
EPA class
Compact Cars
Wiper blades
Gen 1 Volt (2011-2015); sedan body style has no rear wiper
Size-standard part numbers — verify your connector type before buying. Rear blades are model-specific; check the package's vehicle list.
Fuel economy figures are EPA data via fueleconomy.gov (median across matching trims). Performance figures are compiled estimates for the 2015 Chevrolet Volt 1.4L I4 Range Extender and can vary by trim.
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Lexus & Toyota Mechanic · 20+ years.