2015 Jeep Grand Cherokee engine problems

After VO8 emissions recall service (typically involving turbo or EGR modifications), owners report extreme throttle hesitation, severe turbo lag (1–5 second delays), rough idle, loss of power, transmission confusion, and poor fuel economy. Dealers claim behavior is 'normal' and that vehicles must warm up longer than any conventional diesel. Safety hazard in traffic merging and acceleration.

When: Post-recall: complaints filed 2019–2020; failures occur on highway and in town driving within days of recall completion

Symptoms owners cite: Extreme throttle hesitation and lag (1–5 second delays before power delivery); Loss of power, unable to exceed 40–45 mph in some cases; Rough idle and bucking/surging when cold; Transmission does not shift as expected; Fuel economy drop of 4+ mpg; Vehicle stalls when accelerating from stop

Codes mentioned: Check engine light illuminated (multiple narratives), Service throttle/electric throttle control warning

Repairs/costs cited: Dealers perform VO8/V08 recall work (EGR and turbo modifications); no corrective repair or software rollback available. Parts back-ordered; labor-intensive. Owners report $3,000 dealer incentives offered for recall but refused by some due to risk.

Recalls/TSBs owners mention: Recall VO8 / V08 (dates: 2019–2020); Chrysler/FCA claims behavior is normal and owners must allow extended warm-up; no remedy offered. Second emissions notice (FC106038, precursor to another recall) issued 12/2010, status unclear.

Sudden loss of all engine power and electrical function on highway or in traffic. Fuel starvation and internal pump failure cause debris to contaminate fuel system, forcing shutdown. Vehicle stalls without warning; check engine light may come on before failure or may not illuminate until after. Recall parts unavailable for months to years, leaving owners unable to drive.

When: Failures reported at 38k–96k miles; recalls 22V-406 (FCA Z46) and 23V-263 (FCA 01A) issued but parts unavailable for extended periods (months to 2+ years)

Symptoms owners cite: Sudden total loss of motive power while driving at highway speed (70 mph); All electrical power lost; vehicle goes dark; Diesel fuel pours from underneath vehicle; Smoke billows from engine compartment; Check engine light (may appear 5–10 minutes before failure or not at all); Vehicle stalls and will not restart

Codes mentioned: Check engine light (timing varies), Yellow check engine light reported before catastrophic failure in one case

Repairs/costs cited: High-pressure fuel pump and fuel system components require replacement. Dealers often fail to inspect other engine components for damage from pump failure debris. Replacement engines required in some cases (repair cost $30k+). Parts chronically unavailable; one owner waited over 2 years with multiple dealer visits and no service.

Recalls/TSBs owners mention: Recalls 22V-406 (FCA Z46) and 23V-263 (FCA 01A) issued for Bosch CP4 HPFP failures; repair remedy delayed indefinitely. Parts not yet available per VIN tool confirmation. Dealers deny warranty claims despite recalls. One owner reported FCA stated 'no recourse for recall issues' when unable to obtain parts.

Exhaust gas recirculation (EGR) cooler develops cracks from thermal fatigue and stress cycling. Preheated, vaporized coolant leaks from cooler, interacts with fuel vapors and air, and ignites in engine compartment. Results in visible flames, fire spreading to other components, and total vehicle loss. One owner's vehicle caught fire after recall W79 was issued but before official release date.

When: Failure at 96,000 miles; recall W79 (NHTSA 20V-699) issued December 31, 2020, after incident

Symptoms owners cite: Oil temperature gauge reads abnormally high (285°F) on display despite stationary gauge reading mid-range; Engine jerks and shakes; Smoke emerges from engine compartment; Flames visible under or around hood; Burning object falls from engine area; Cabin fills with smoke

Codes mentioned: Oil temperature warning light illuminated

Repairs/costs cited: EGR cooler replacement required under recall W79. One owner's fire required fire department intervention and battery disconnection. Owner reported 'something in engine compartment put fire out before FD arrived.'

Recalls/TSBs owners mention: Recall W79 (NHTSA 20V-699) issued December 31, 2020, for EGR cooler thermal fatigue cracking susceptible to causing vehicle fire via coolant vaporization and hydrocarbon interaction.

Oil cooler located on top of engine intake fails without warning. Plastic housing becomes brittle from sustained high engine temperatures and cracks, allowing oil to leak rapidly into cooling system and onto exhaust manifold/pipes. No check engine light or warning illuminates. Oil overflow into engine compartment creates fire hazard and potential catastrophic engine damage from oil starvation.

When: Reported at various mileages (38k–145k miles); failures occur after years of operation with no prior indication

Symptoms owners cite: No warning lights or messages on dashboard; Oil visible dripping under vehicle; Smell of burning oil from exhaust pipes; Oil found in cooling system; Oil pooling in engine compartment

Repairs/costs cited: Plastic oil cooler must be replaced with aluminum aftermarket part ($1,800–$8,600 total repair depending on contamination and secondary damage). One independent shop confirmed they repair many of these failures and questioned why recall has not been issued. Replacement cooler made of aluminum, not plastic. Some owners quoted $8,600 for full repair including all affected components.

Recalls/TSBs owners mention: No recall issued. Independent repair shops repair many of these failures and note they are not even dealers. Owners report dealer unaware of the frequency of this defect.

Ticking or clicking noise from engine (3.6L Pentastar), typically on passenger side. Loss of engine power and sometimes bucking/surging when cold. Dealers replace right intake camshaft and lifters/rockers; issue recurs within months to years. Second visit reveals all 12 lifters, rockers, camshafts need replacement. No warning lights until power loss occurs. Defect inherent to engine design; same faulty parts replaced multiple times without resolution.

When: First symptoms appear 55k–80k miles; recurrence at 70k, 80k+ miles despite prior repair; pattern repeats over 1–3 year intervals

Symptoms owners cite: Ticking or clicking noise from engine (often passenger-side intake); Loss of engine power; Bucking and surging when engine cold; No warning lights or messages initially; loss of power may trigger check engine light

Codes mentioned: Check engine light (when loss of power occurs)

Repairs/costs cited: First repair: right intake camshaft, 6 lifters, rockers, and related gaskets replaced. Failure recurred within months. Second repair: all 12 lifters, rockers, camshafts, and gaskets replaced. Ticking and power loss resumed by 80k miles with added cold-start bucking. No lasting resolution. Owner notes same defective parts used to 'fix' issue repeatedly.

Recalls/TSBs owners mention: No recall identified in narratives. Dealer warranty covers repairs if within warranty period, but once out of warranty, repairs become owner responsibility. Dealership inspected vehicle on two separate occasions and identified issue both times but solution is temporary.

Dealership fills EcoDiesel engine with 11 quarts of oil instead of 8 quarts specified in owner's manual. Overfill occurs at first oil change after purchase. Owner reports finding oil in 'everything'—crankcase sensor flooded, oil cap/cover leaking. Loss of 5 mpg and excessive DEF consumption. Defect appears systemic: multiple customers received 11 quarts at same dealership, suggesting Chrysler's system database may have listed incorrect capacity (11 vs. 8 quarts) for EcoDiesel.

When: Discovered at 7,000 miles (first oil change); not corrected until 98 days later (January 2016) when another dealer drained to correct level

Symptoms owners cite: Engine light comes on after oil change; Oil found in crankcase sensor area and throughout engine; Crankcase cover leaking; Fuel economy decreased 5 mpg; Excessive DEF consumption

Codes mentioned: Check engine light

Repairs/costs cited: First dealer: software update attempted (no fix). Second dealer: crankcase sensor replaced (no fix), then crankcase cover replaced (no fix). At 98 days and 7,000 miles, second dealer discovered 11 quarts vs. 8 quarts and drained to correct level. Owner reports online research found other EcoDiesel owners with same problem, suggesting systematic mislabeling or training issue at dealers. Fuel economy improved somewhat but never returned to baseline.

Recalls/TSBs owners mention: Chrysler/Jeep appears to have systemic capacity mislabeling in service records (11 vs. 8 quarts for EcoDiesel per owner). Owner's manual clearly states 8 quarts. No recall or bulletin issued.

Radiator fails prematurely at 85k–92k miles, well before normal service life. Cooling system develops multiple small leaks and requires frequent coolant top-ups (every other week reported in one case). Some leaks originate from EGR cooler area; others from water pump or turbo coolant lines. One dealership now stocks radiators in inventory due to frequency of failures.

When: Failures occur 85k–145k miles; one recall (20V-699) for EGR cooler issued, but other leaks persist

Symptoms owners cite: Fluid leaking from under vehicle; Radiator fumes smelled in cabin; Coolant reservoir repeatedly empty despite no visible leak; Check engine light (some cases); Burn marks on engine (EGR cooler area); Thick, black sticky substance under EGR valve

Codes mentioned: Check engine light (some cases)

Repairs/costs cited: Radiator replacement cost ~$900; thermostat replacement $130. Turbo water feed tube replacement $1,101.72 (rubber hose exposed to high temps known to fail). Water pump seal replacement labor-intensive (intake manifold must be removed). One owner notes mechanic stated water pump seals pinched and prone to leakage. Post-VO8 recall, water system failures accelerated in some cases.

Recalls/TSBs owners mention: No system-wide recall for radiator; recall W79 (20V-699) exists for EGR cooler cracking. Dealer acknowledges frequency and now stocks radiators, but no proactive notification or recall issued to owners.

Crankshaft position sensor fails or tone wheel delaminates, causing engine stalling, loss of power, and limp mode. Symptoms include check engine light, traction control light, and inability to accelerate beyond 40–45 mph. Many VINs excluded from applicable recalls (20V-475, 23V-411000) despite matching failure symptoms exactly.

When: Failures reported 43k–166k miles; recall campaigns exist but many VINs not included despite same symptoms

Symptoms owners cite: Check engine light illuminated; Traction control warning light; Electric throttle control warning; Vehicle loses motive power, slows to 30–40 mph, cannot exceed limit; Engine stalls at traffic light or while driving; Hesitation and loss of power while accelerating; No power delivery when depressing accelerator

Codes mentioned: Crankshaft position sensor code, Check engine light

Repairs/costs cited: Crankshaft position sensor or tone wheel replacement required. Costs not specified in narratives. One owner unable to afford repair due to cost; another's VIN excluded from recall despite exact symptom match; independent mechanic diagnosed issue but owner did not pursue repair.

Recalls/TSBs owners mention: Recalls 20V-475000 and 23V-411000 issued for engine/engine cooling; however, many affected VINs excluded despite matching symptoms. Manufacturers advise contact with NHTSA if VIN not included in recall.

Vehicle stalls without warning while driving at various speeds (20–85 mph), sometimes leaving driver unable to control vehicle or resulting in collisions. Causes include fuel system contamination (debris from HPFP failure), crankshaft sensor failure, limp mode entry, and unknown sensor issues. Check engine light may or may not illuminate; many failures have zero warning.

When: Reported across mileage range (21k–166k miles); some incidents during heavy traffic or highway driving

Symptoms owners cite: Engine stalls while driving at variable speeds (20–85 mph); No motive power; vehicle slows and stops in traffic lane; No or delayed check engine light; Loss of all electrical power (some cases); ABS, traction control, and other warning lights flash on in some cases; Vehicle enters limp mode in some cases; Shift remains locked in Park after stall

Codes mentioned: Check engine light (inconstent presence), ABS warning, Traction control warning

Repairs/costs cited: Repairs vary by root cause: HPFP replacement, crankshaft sensor replacement, fuel system component replacement, ECM replacement. Multiple attempts sometimes required. In one case, starter refused to operate after stall, requiring police intervention to prevent roadway blockage. One owner totaled vehicle in collision caused by loss of power and brake failure.

Recalls/TSBs owners mention: Related to recalls 20V-475, 22V-406, 23V-411000, but many VINs excluded. Manufacturers directed to investigate in some cases but provided no remedy.

Post-VO8 emissions recall, throttle becomes sluggish or unresponsive until engine reaches full operating temperature (safety hazard in traffic). Conversely, in one case vehicle accelerated independently while in Park, and depressing throttle at merge produced zero response (engine remained at idle), forcing driver to creep across highway lanes. Throttle body and tone wheel replacement sometimes required post-recall.

When: Post-VO8 recall (Spring 2019 onwards); unintended acceleration case at 98k miles

Symptoms owners cite: Throttle hesitation and lag until engine warm (1–3 seconds common, up to 5+ seconds reported); Motor stays at idle when throttle depressed during merge or acceleration; Vehicle unable to provide power on demand (dangerous in traffic); Vehicle independently accelerates while in Park; Throttle does not respond to pedal input; No warning light illuminated (independent acceleration case)

Codes mentioned: Service throttle control warning light (post-recall)

Repairs/costs cited: Post-VO8 recall, no corrective action available; FCA claims behavior normal. Independent acceleration case: dealer unable to duplicate failure during diagnostic, no repair performed.

Recalls/TSBs owners mention: VO8 recall performed but no remedy for throttle lag and hesitation post-service; FCA advises extended warm-up. No known fix or software adjustment offered.

Hydraulic engine isolators (engine mounts) fail, allowing engine to shift or 'slop' excessively during deceleration or braking. Driver feels hard jolt similar to downshift from second to first gear. Defect occurs approximately 4 years after manufacture (typical for WK2 Grand Cherokee). No warning light; failure discovered during diagnostic after owner reports concern about jolting.

When: Approximately 4 years after date of manufacture (around 48k miles for 2015 model)

Symptoms owners cite: Hard jolt felt during deceleration or when applying brakes; Engine appears to shift or move excessively; Concern over loss of vehicle control

Repairs/costs cited: Hydraulic engine isolators (mounts) Mopar P/N 68252522AA require replacement. Problem resolved after replacement. Owner notes internet research confirms this is known issue with WK2 model.

Recalls/TSBs owners mention: No recall issued. Manufacturer apparently does not consider inadequately secured engine shift a safety issue per owner's assessment.

Cylinder head cracks or fails (driver's side reported), causing oil to leak down engine and onto hot exhaust manifold/pipes. Fire hazard from burning oil. No warning light until failure occurs; leak discovered upon visual inspection. Component not available for inspection (retained by dealership).

When: Failure mileage not specified; oil leak noted during normal operation

Symptoms owners cite: Engine oil leaking from cylinder head down engine block; Oil dripping onto exhaust pipes; Smell of burning oil; Visual observation of leak; Check engine light (after leak develops)

Codes mentioned: Check engine light (after failure)

Repairs/costs cited: Cylinder head replacement required. Dealership retained component, making independent inspection impossible. Owner noted problem is well-documented on internet as common issue for 2015 model.

Recalls/TSBs owners mention: No recall identified. Dealer did not indicate systemic issue.

Engine oil becomes contaminated with fuel (dilution of 5.5% confirmed by independent analysis via Blackstone Labs) and internal debris from Bosch CP4 high-pressure fuel pump failure. Vehicle loses motive power suddenly while driving at highway speed. Dealer initially claims 'overfilled oil,' but independent testing proves fuel contamination. Covered by recalls 22V-406 and 23V-263, but HPFP inspection not performed by dealer despite recall requirements.

When: Failure occurred; recalls 22V-406 (FCA Z46) and 23V-263 (FCA 01A) issued but not yet inspected per recall

Symptoms owners cite: Sudden loss of motive power at highway speed (70 mph); Low oil pressure warning displayed; Vehicle inoperable after loss of power

Codes mentioned: Low oil pressure warning

Repairs/costs cited: Independent oil analysis (Blackstone Labs) revealed 5.5% fuel dilution, indicating HPFP internal debris contamination. Dealer blamed overfilled oil but independent testing contradicted this. HPFP inspection and likely replacement required per recalls 22V-406 and 23V-263, but dealer has not performed work.

Recalls/TSBs owners mention: Recalls 22V-406 (FCA Z46) and 23V-263 (FCA 01A) issued for HPFP failure and fuel system contamination. Recall documents state HPFP failure may introduce debris and cause fuel starvation and unexpected loss of motive power.

Multiple critical recalls (W79, 20V-699, 20V-475, 22V-406, 23V-411000) issued but repair parts not manufactured or distributed to dealers. Owners notified of recalls but unable to schedule repairs. Dealers confirm parts unavailable; some place customers on waiting lists that grow to 9+ months or are discontinued. Manufacturers exceed reasonable timeframes (2+ years in some cases) to make remedy available, leaving owners driving vehicles with unrepaired safety defects.

When: Recurring issue 2019–2023; parts unavailable for months to 2+ years after recall notification

Symptoms owners cite: Recall notice received from manufacturer; Dealer confirms parts not available; Customer placed on waiting list or told none available; Weeks, months, or years pass without parts arrival; Dealership instructed not to add new customers to list due to high demand

Repairs/costs cited: Owners unable to obtain parts despite multiple dealer visits and manufacturer contact. One owner attempted to sell vehicle but disclosed missing recall, making sale impossible. Another waited over 2 years with no resolution. Dealers report inability to perform recall work without parts; one owner quoted $30k+ for engine replacement due to unrepaired HPFP failure damage while waiting for recall parts.

Recalls/TSBs owners mention: Recalls issued (W79, 20V-699, 20V-475, 22V-406, 23V-263, 23V-411000) but remedy parts unavailable. Manufacturers exceeded reasonable timeframe for parts distribution. FCA told one owner 'no recourse for recall issues.' Dealers confirmed parts distribution disconnect and 9+ month wait for addition to waiting list in some cases.

Engine experiences sudden total failure with loss of compression in one or more cylinders, loud metallic-chattering noise, and inability to restart. Bottom-end bearing collapse or internal component failure; engine seizes. Occurs at low mileage (21k–96k miles) despite all recommended maintenance performed at authorized dealers. Zero compression measured in affected cylinder(s). One case involved high-pressure fuel pump failure that went undiagnosed for extended period, allowing internal damage to accumulate before catastrophic failure.

When: Failures at 21k, 96k miles; unrepaired HPFP issues allowed to persist for extended periods before catastrophic failure

Symptoms owners cite: Loud metallic-chattering noise from engine; Engine stalls while driving at low speed (20 mph, normal conditions); Zero compression in one or more cylinders (measured post-failure); Starter refuses to operate after stall; Engine seized and will not turn over

Codes mentioned: Louder-than-usual diesel rumble reported to service (dismissed as 'normal')

Repairs/costs cited: Engine replacement required ($30k+ quoted in some narratives). One owner's technician noted 'bottom-end engine failure' post-breakdown. Another owner had HPFP failure unaddressed for months/years, allowing debris to circulate and damage internal components before final seizure. Jeep service promised engine replacement but timeline unclear.

Recalls/TSBs owners mention: Engine replacement promised but extended delays due to part availability. No proactive warranty coverage; owners liable for repairs unless under active recall-related warranty (AEM warranty to 120k miles in one case, but claim denied).

Check engine light remains illuminated despite multiple repair attempts. Dealer service repeatedly misdiagnoses root cause, replacing unrelated components (thermostat, alternator, particulate filter) for years while true issue (high-pressure fuel pump) goes unaddressed. Recall issued (22V-406 for HPFP) finally identifies correct problem after 9+ years and $9,000 in failed repair attempts. DEF system alerts also reported post-recall, sometimes accompanied by coolant leaks.

When: Check engine light continuous for 9+ years; recall issued 6/9/2022 but parts still unavailable

Symptoms owners cite: Check engine light on continuously; Crawler/limp mode activation when raining (reported in one case); Service DEF system alert; Radiator fumes in cabin (one case); Improper DEF used warning message

Codes mentioned: Check engine light (persistent), Emissions system failure codes (misinterpreted by dealers), DEF system error codes

Repairs/costs cited: Owner replaced thermostat (no overheating issue), alternator (no electrical issue), particulate filter (no benefit) over 9 years and $9,000 spent. Recall 22V-406 finally identified HPFP as true cause. Internal damage unknown from years of undiagnosed HPFP failure. Another owner's smog check failed post-VO8 recall because emissions system self-checks incomplete; vehicle then showed catastrophic engine failure immediately after.

Recalls/TSBs owners mention: Recall 22V-406 issued 6/9/2022 for HPFP; parts still unavailable as of complaint date. No apology or remediation for years of diagnostic failure.