P0430 and p0420 code.*js
2006 Nissan Titan engine problems
severe 62 complaints filed with NHTSA · avg repair $3,100 · see engine across all vehicles →
Failure mileage
Complaints
62
Recalls
0
Avg fix
$3,100
3fires
2injuries
When does it fail?
Of the 62 engine complaints filed for the 2006 Nissan Titan, here's the actual mileage breakdown — failures cluster heaviest at 75,000-100,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
Owners have filed 62 engine complaints with NHTSA against this vehicle, but no formal recall covers the issue — the federal record reflects what manufacturers have admitted, not everything owners are reporting.
Among the 10 model years of Nissan Titan in our records for engine problems, this one ranks #3 by owner-complaint volume.
The failure pattern owners describe
Buyer takeaway: The 2006 Nissan Titan has widespread, documented engine and cooling system failures—cracked exhaust manifolds that leak fumes into the cabin, IPDM/ECM stalling incidents, radiator cracking, and catalytic converter failures. Many owners fall just outside warranty coverage and face repair bills exceeding $2,000–$7,000. Expect to encounter these issues if you buy one used.
The 2006 Nissan Titan engine suffers from several distinct failure patterns that owners describe in these complaints. Cracked exhaust manifolds dominate the complaints—both driver and passenger side cracks appear frequently between 50,000 and 180,000 miles, often with audible ticking under cold start or acceleration. Owners report raw exhaust fumes leaking into the cabin, causing headaches, nausea, and dizziness. The manifolds are welded to catalytic converters as a single unit, making replacement expensive—dealers quote $1,700 to $3,000+. Many owners fall just outside the 8-year/80,000-mile emissions warranty by a few thousand miles and get denied coverage.
The Intelligent Power Distribution Module (IPDM) and Electronic Control Module (ECM) fail unexpectedly, causing stalling at highway speeds and in traffic—a serious safety hazard. When the IPDM fails, raw fuel dumps into the catalytic converter, destroying it.
Premature radiator failure—cracking and splitting—causes coolant leaks and system contamination that can damage the transmission. Some owners report the cooling system failure mixing radiator fluid into the transmission, requiring both to be replaced.
Catalytic converters fail prematurely, sometimes with honeycomb material breaking loose and entering the engine, causing severe damage. Engine fires have occurred in several reported cases with little clarity on root cause from Nissan.
CV valve issues, transmission shifting problems, electrical gremlins (dead batteries, malfunctioning anti-theft alarms, non-functional DVD players), and fuel pump failures round out the reported issues.
Same Nissan Titan engine reports on nearby years: 2005 · 2007 · 2008
Failure modes owners describe
Cracked Exhaust Manifolds
Both driver and passenger side exhaust manifolds crack under normal driving, allowing raw exhaust to leak into the engine bay and cabin. Manifolds are welded to catalytic converters as one unit. Ticking noise under cold start or acceleration is typical. Problem affects 2004–2007 model years extensively.
When: Between 50,000 and 180,000 miles; many reported near or just past 80,000-mile emissions warranty threshold
Symptoms owners cite: Audible ticking from engine area, especially on cold start and under acceleration; Raw exhaust odor in passenger cabin; Headaches and nausea from exhaust fume exposure; Loud clicking or banging noise from manifold area; Loss of power/hesitation while driving; Fumes entering cabin even with windows down
Codes mentioned: P0420 (catalyst system efficiency below threshold), CHECK ENGINE light illumination
Repairs/costs cited: Replacement manifold/catalytic converter assemblies cost $1,700–$3,000+ including labor. Owners report dealers replace failed manifolds with identical new ones rather than redesigned parts. Some repairs covered under 8-year/80,000-mile emissions warranty; many owners fall just outside this window and are denied coverage.
Recalls/TSBs owners mention: Nissan acknowledges this is a known issue on 2004–2007 Titans but has not issued a recall. Dealers state they 'automatically check every Titan' for this issue. Nissan refuses coverage for owners slightly past warranty mileage. No design improvements mentioned in replacement parts.
IPDM/ECM Failure Causing Stalling
The Intelligent Power Distribution Module (IPDM) and/or Electronic Control Module (ECM) fail without warning, causing immediate engine stall while driving—often in traffic or at highway speeds. When IPDM fails, raw fuel is dumped into the catalytic converter, destroying it. This creates a secondary failure chain.
When: Reported between approximately 80,000 and 150,000 miles
Symptoms owners cite: Engine suddenly shuts down while driving at any speed; Vehicle quits in traffic with no warning; Engine only rough-idles or will not restart immediately; Vehicle stalls repeatedly on multiple occasions; After restart, SERVICE ENGINE SOON light appears
Codes mentioned: IPDM failure confirmed by dealer diagnostics, ECM failure confirmed by dealer diagnostics, P0420 or similar catalytic converter efficiency codes (secondary to raw fuel damage)
Repairs/costs cited: IPDM/ECM replacement cost approximately $306 and up, plus additional diagnostic labor. Catalytic converter damage is a direct consequence, typically requiring another $500–$2,000+ repair. Parts backlogs reported; some dealers had 3+ week wait times.
Recalls/TSBs owners mention: Nissan issued NHTSA Campaign ID 10V517000 (Recall) covering IPDM/ECM failure. Nissan reimbursed owners for IPDM/ECM repairs under this recall but initially refused to cover secondary catalytic converter damage, claiming it was a separate issue despite being a direct result of the recall-covered part failure.
Radiator Cracking and Coolant System Failure
Plastic radiators crack or split, causing coolant leaks. In some cases, radiator fluid contaminates the transmission, causing severe transmission damage and requiring both systems to be replaced. Leaks also drain antifreeze onto streets and into storm drains.
When: Reported from early ownership through high mileage (5,900 miles to 150,000+ miles)
Symptoms owners cite: Large pool of antifreeze under vehicle; Cabin heater not warming properly; Antifreeze dripping from bottom of radiator while idling; Vehicle vibrating and sputtering while driving; Radiator fluid contaminating transmission fluid
Repairs/costs cited: Single radiator replacement costs vary; owners report considering high-performance aluminum radiators to avoid repeat failures (significant cost premium). Transmission replacement due to contamination can exceed $7,300+ (one owner cited $7,313.56). Plastic radiators noted as cost-cutting measure for CAFE compliance but with poor longevity.
Recalls/TSBs owners mention: No recalls mentioned. Dealers treat as normal wear/maintenance item outside warranty. No design correction or upgraded parts noted.
Premature Catalytic Converter Failure
Catalytic converters fail prematurely, often between 80,000 and 120,000 miles. In some cases, internal honeycomb material breaks loose and is sucked back into the engine, causing severe internal engine damage requiring complete engine replacement. Some failures appear related to IPDM raw fuel dumping; others are standalone.
When: Typically 80,000–135,000 miles; some reported just after 80,000-mile emissions warranty expires
Symptoms owners cite: CHECK ENGINE light with efficiency codes; Smoke from exhaust; Loud rattling or clanking from catalytic converter; Broken honeycomb material visible in exhaust or lodged in engine; Engine hesitation and loss of power; Engine clanking, vibration, then shutdown; Occupants becoming nauseated (likely from exhaust/fume exposure)
Codes mentioned: P0420 (catalyst system efficiency below threshold), P0430 (secondary catalytic converter efficiency)
Repairs/costs cited: Replacement cost $1,700–$3,000+ for all catalytic converters. If honeycomb material damages internal engine, complete engine replacement required (one owner reported this cost a fortune). Manifolds and converters are welded together, increasing repair cost.
Recalls/TSBs owners mention: Nissan acknowledges the pattern when IPDM failure is the cause (Campaign 10V517000) but reimbursement is limited to the control module. Nissan refused to cover secondary converter damage in at least one case. No recall for converter defect itself.
Engine Fire
Multiple owners report vehicle fires erupting from under the hood with no warning lights. Nissan investigated at least one fire and stated it was not a company problem, though a recall notice for an AC unit that may lead to fire was later received. Root cause remains unclear in several reports.
When: Reported at 5,900 miles and 120,000 miles
Symptoms owners cite: Flames visible under hood; Smoke coming from engine compartment; Fire erupting 3–5 minutes after exiting vehicle; No warning lights prior to fire
Repairs/costs cited: One vehicle was repaired under warranty; investigation noted possible condenser belt involvement in one case. Actual repair scope and cost not detailed in complaints.
Recalls/TSBs owners mention: Nissan investigated at least one fire and declined to take responsibility initially. AC-related recall (10V517000 or related) was issued after at least one fire report, suggesting potential AC condenser issue.
Electrical Gremlins and Battery Failure
Various electrical failures including dead/failed batteries that lose charge quickly, anti-theft alarm sounding randomly, non-functional DVD player, sunroof malfunctions, inoperative cigarette lighters, and gauges flickering when the ignition is off.
When: Early in ownership and after ECM/IPDM replacement (one case reported battery failure one week after module replacement)
Symptoms owners cite: Battery dies and will not hold charge; Anti-theft alarm sounding randomly; DVD player non-functional with no explanation; Sunroof not opening/closing properly; Cigarette lighters never worked; Gauges (speedometer, tachometer, fuel) flickering rapidly after ignition off; Loud clicking heard from engine during gauge flickering; Brake, CHECK ENGINE, and air pressure warning lights staying on permanently
Repairs/costs cited: Battery replacement costs approximately $100–$200 (one owner paid full price on a weekend with dealership urgency markup). Other electrical issues not clearly resolved in complaints.
Recalls/TSBs owners mention: Electrical and AC recalls mentioned (August 2008) for 2006 Titans, but at least one owner did not receive recall notices. Recalls appear to cover fan/AC, not comprehensive electrical system.
Transmission Shifting and Fluid Contamination Issues
Transmission has difficulty shifting into drive and downshifting; manual shift features do not work. In one case, radiator fluid contaminated transmission oil causing vibration and requiring both systems to be replaced.
When: Not always specified; one transmission fluid contamination case occurred at 150,000 miles; shifting issues reported on vehicles purchased in 2006
Symptoms owners cite: Difficulty shifting into drive; Unable to downshift manually when manual shift feature is engaged; Manual shift features not working; Transmission vibrating and sputtering due to fluid contamination
Repairs/costs cited: One contamination case required complete transmission and radiator replacement totaling $7,313.56. No specific costs for shifting repairs mentioned.
Recalls/TSBs owners mention: No recalls or warranty coverage mentioned in complaints.
CV Valve and Motor Problems
Owner reports CV valve issues causing engine to shut down. Engine motor problems also noted early in ownership, with engine replacement at 50,000 miles.
When: Early in ownership; motor replaced at 50,000 miles; CV valve issues not specifically dated
Symptoms owners cite: CV valve causing engine to shut down; Motor problems requiring replacement
Repairs/costs cited: Engine replacement required by 50,000 miles; truck was purchased with less than 400 miles, suggesting severe manufacturing or delivery-related defect.
Recalls/TSBs owners mention: One owner (complaint #1) mentioned the truck was likely purchased as a water-damaged vehicle from post-Hurricane Katrina inventory and may have been inadequately repaired before sale.
Intake Manifold Cracking
One owner reported intake manifold (not exhaust) cracking, though this appears less common than exhaust manifold failures.
When: Mileage not specified
Symptoms owners cite: Indescribable noise coming from engine at 30 MPH
Repairs/costs cited: Not repaired; repair cost not quoted.
Recalls/TSBs owners mention: No response mentioned; manufacturer not notified.
Synthesized from 62 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 2 most recent
I found my truck has 3 recalls that need to be done. But my exhaust manifold is also cracked I have heard of this bing a known problem as well. It has been cracked and leaking for a while but I haven't been driving it to much seens it's been leaking.
Had engine trouble with your 2006 Nissan Titan?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the engine problem on the 2006 Nissan Titan?
It's a meaningful issue. 62 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $3,100.
At what mileage does the engine typically fail?
Across the 47 complaints that reported odometer mileage, most engine failures cluster between 69,000 and 109,000 miles, with the median around 85,000. A quarter of owners report trouble before 69,000; a quarter make it past 109,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
What does it cost to fix?
Independent shops typically charge around $3,100 for engine repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to engine?
No active recalls currently cover engine issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2006/Nissan/Titan.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.