The 2009 Cobalt is a basic econobox with a major Achilles' heel: catastrophic ignition switch failures that can kill the engine mid-drive and disable airbags. Beyond that recall nightmare, both Ecotec engines are prone to timing chain stretch and oil consumption issues that can grenade motors if ignored.
Ignition Switch Failure (Recall 14V-047)
Common · high severitySymptoms: Engine suddenly shuts off while driving, especially on rough roads or with heavy keychain, Loss of power steering and power brakes with engine off, Airbag warning light on, airbags will not deploy in crash, Key can be removed while in ACC or RUN position
Fix: Replace ignition switch and lock cylinder under recall. If recall already done, recheck for proper repair—many early fixes were botched. 1.5-2.0 hours if paying out-of-pocket post-recall.
Estimated cost: $0 (recall) or $250-400 if self-pay
Timing Chain Stretch and Guide Failure (2.2L and 2.4L)
Common · high severityTypical onset: 80,000-140,000 mi
Symptoms: Cold-start rattle for 2-5 seconds that worsens over time, Check engine light with P0008, P0009, P0010, P0011 cam correlation codes, Rough idle and loss of power, Catastrophic engine failure if chain jumps timing
Fix: Replace timing chain, guides, tensioner, and cam phasers. If jumped timing, expect bent valves and head work or full engine replacement. Timing set alone: 6-8 hours. Engine replacement: 12-16 hours.
Estimated cost: $1,200-2,000 (preventive) or $3,500-5,500 (engine damage)
Excessive Oil Consumption (2.2L and 2.4L)
Common · medium severityTypical onset: 60,000-120,000 mi
Symptoms: Burning 1+ quart every 1,000 miles, Blue smoke on startup or acceleration, Fouled spark plugs, Low oil pressure if run too low
Fix: Worn piston rings and valve seals are the culprits. Band-aid: run thicker oil and check level weekly. Real fix requires engine rebuild or short block replacement. 14-18 hours labor for rebuild, 10-14 for short block swap.
Estimated cost: $3,000-5,000 (rebuild) or $2,500-4,000 (reman short block)
Electric Power Steering (EPS) Failure
Occasional · high severityTypical onset: 70,000-110,000 mi
Symptoms: Sudden complete loss of power steering assist while driving, Service StabiliTrak, Traction Control, and Power Steering messages, Steering becomes extremely heavy, especially at low speeds, May be intermittent at first, then permanent
Fix: Replace electric power steering motor/column assembly or control module. Some cases fixed by re-soldering connections inside module (1-2 hours), but most require column swap (2.5-3.5 hours).
Estimated cost: $400-700 (module repair) or $800-1,400 (column assembly)
Automatic Transmission 4T45E Failures
Occasional · medium severityTypical onset: 90,000-140,000 mi
Symptoms: Harsh 1-2 or 2-3 shifts, Slipping on acceleration, Transmission oil cooler line leaks (external or into radiator), Delayed engagement when shifting to Drive or Reverse
Fix: Replace transmission oil cooler lines as preventive maintenance. Internal failures require rebuild or replacement. Cooler lines: 1.5 hours. Rebuild: 8-12 hours. R&R for reman: 6-8 hours.
Estimated cost: $200-350 (cooler lines) or $1,800-2,800 (reman trans)
Fuel Pump Failure
Occasional · medium severityTypical onset: 100,000-150,000 mi
Symptoms: No-start condition with crank but no fire, Stalling at operating temperature, Loss of power under load or acceleration, Whining noise from rear of vehicle
Fix: Replace in-tank fuel pump module. Some affected by recall 10V-017 (check VIN eligibility). 2-3 hours labor to drop tank and swap assembly.
Estimated cost: $400-700
Hard pass unless free or under $2,000—ignition switch can kill you, and the engines are ticking time bombs after 80k without proof of timing chain service.
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.