ISUZU ASCENDER (2003–2009)
ISUZU ASCENDER (2003–2009) — Technical Guide, Fault Codes & Maintenance
Built 2003–2009 · all production years covered on this single page
4.2L I6 • Gasoline
2009
🚗 Isuzu ASCENDER 2009
Every figure on this Isuzu Ascender (2003–2009) page is aggregated and cross-checked against more than 6.6 million real workshop operations, NHTSA records and OEM technical sources — and updated continuously. No invented estimates.
The Isuzu Ascender (2003–2009) is powered by a 4.2L I6 engine. Use the sections below for verified fluids, battery, OEM tyres, the maintenance schedule, recommended parts and the most commonly reported OBD2 fault codes for this vehicle.
Common problems
Common repairs
Fluids & lubricants
Battery
Fault codes (OBD2)
Dashboard lights
Parts comparator
Accessories & tools
Tyres
Recalls & TSB
Complaints
Workshops nearby
COMMON PROBLEMS
Transmission fault signal (TCM)MODERATE
The transmission module detected a fault — check separate transmission codes.
Related codes: P0700
Misfire / Loss of cylinderMODERATE
Rough running, idle vibration, power loss.
Related codes: P0300
Thermostat: coolant temperature lowLOW
Thermostat stuck open — engine does not reach operating temperature.
Related codes: P0128
Battery/system voltage lowLOW
System voltage below 10V — check alternator, battery or wiring.
Related codes: P0562
P0011LOW
Check with an OBD2 scanner.
Related codes: P0011
AVERAGE INDICATIVE COSTS
Prices may vary by area and workshop.
Full service
€ 120 – € 200
Full brake service
€ 180 – € 300
Spark plug replacement
€ 80 – € 140
Electronic diagnosis
€ 40 – € 70
WORKSHOP LABOUR RATES BY COUNTRY
Average independent-workshop hourly labour rates, to estimate repair costs in your country.
🇩🇪Germany€95/h
🇪🇸Spain€55/h
🇫🇷France€75/h
🇮🇹Italy€45/h
🇬🇧UK£80/h
🇺🇸USA$120/h
Reference rate
€45/h
Source: Eurostat 2024
💧 FLUIDS & LUBRICANTS
📋 RECALLS & TSB (18)
NHTSA 05V494000
Latches/Locks/Linkages › Doors › Latch
Date: 27/10/2005
CERTAIN SPORT UTILITY VEHICLES HAVE A REAR SIDE CLOSURE LATCH THAT MAY NOT LATCH OR UNLATCH DUE TO CORROSION CAUSED BY ROAD SPLASH, SUCH AS WATER AND ROAD SALT. THESE VEHICLES WERE ORIGINALLY SOLD IN OR CURRENTLY REGISTERED IN THE FOLLOWING STATES: CONNECTICUT, DELAWARE, ILLINO…
NHTSA 03V269000
Equipment › Other › Owners/Service/Other Manual
Date: 21/07/2003
CERTAIN SPORT UTILITY VEHICLES FAIL TO COMPLY WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 225, "CHILD RESTRAINT ANCHORAGE SYSTEM." THE OWNER'S MANUAL DOES NOT EXPLAIN THE MEANING OF THE LOCATION SYMBOLS FOR THE LOWER UNIVERSAL ANCHORAGE SYSTEM.
NHTSA 12V406000
Electrical System
Date: 16/08/2012
General Motors (GM) is recalling certain model year 2006 Chevrolet Trailblazer EXT and GMC Envoy XL and 2006-2007 Chevrolet Trailblazer, GMC Envoy, Buick Rainier, SAAB 9-7x, and Isuzu Ascender vehicles, originally sold or currently registered in Connecticut, Delaware, Illinois, I…
NHTSA 12V406000
Electrical System
Date: 16/08/2012
General Motors (GM) is recalling certain model year 2006 Chevrolet Trailblazer EXT and GMC Envoy XL and 2006-2007 Chevrolet Trailblazer, GMC Envoy, Buick Rainier, SAAB 9-7x, and Isuzu Ascender vehicles, originally sold or currently registered in Connecticut, Delaware, Illinois, I…
NHTSA 15V519000
Exterior Lighting › Headlights
Date: 14/08/2015
General Motors LLC (GM) is recalling certain model year 2007 Pontiac Grand Prix, 2006-2009 Buick LaCrosse, 2006-2007 Buick Rainier, Chevrolet Trailblazer, GMC Envoy, 2006 Chevrolet Trailblazer EXT, GMC Envoy XL, 2006-2008 Isuzu Ascender, and Saab 9-7x vehicles. In the affected v…
NHTSA 15V519000
Exterior Lighting › Headlights
Date: 14/08/2015
General Motors LLC (GM) is recalling certain model year 2007 Pontiac Grand Prix, 2006-2009 Buick LaCrosse, 2006-2007 Buick Rainier, Chevrolet Trailblazer, GMC Envoy, 2006 Chevrolet Trailblazer EXT, GMC Envoy XL, 2006-2008 Isuzu Ascender, and Saab 9-7x vehicles. In the affected v…
NHTSA 15V519000
Exterior Lighting › Headlights
Date: 14/08/2015
General Motors LLC (GM) is recalling certain model year 2007 Pontiac Grand Prix, 2006-2009 Buick LaCrosse, 2006-2007 Buick Rainier, Chevrolet Trailblazer, GMC Envoy, 2006 Chevrolet Trailblazer EXT, GMC Envoy XL, 2006-2008 Isuzu Ascender, and Saab 9-7x vehicles. In the affected v…
NHTSA 13V248000
Electrical System
Date: 13/06/2013
General Motors (GM) is recalling certain model year 2005-2007 SAAB 9-7x; 2006 Chevrolet Trailblazer EXT and GMC Envoy XL; and 2006-2007 Chevrolet Trailblazer, GMC Envoy, Buick Rainier and Isuzu Ascender vehicles. Fluid may enter the driver's door module, causing corrosion that c…
NHTSA 13V248000
Electrical System
Date: 13/06/2013
General Motors (GM) is recalling certain model year 2005-2007 SAAB 9-7x; 2006 Chevrolet Trailblazer EXT and GMC Envoy XL; and 2006-2007 Chevrolet Trailblazer, GMC Envoy, Buick Rainier and Isuzu Ascender vehicles. Fluid may enter the driver's door module, causing corrosion that c…
NHTSA 05V552000
Equipment › Other › Labels
Date: 07/12/2005
CERTAIN TRUCKS AND SPORT UTILITY VEHICLES FAIL TO CONFORM TO THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 110, "TIRE SELECTION AND RIMS." THESE VEHICLES WERE SHIPPED WITH TIRE AND LOADING INFORMATION LABELS LISTING AN INACCCURATE VEHICLE CAPACITY WEIGHT.
NHTSA 05V455000
Steering › Hydraulic Power Assist › Hose, Piping, And Connections
Date: 05/10/2005
CERTAIN PASSENGER VEHICLES MAY HAVE BEEN BUILT WITH A POWER STEERING HOSE THAT IS NOT TO SPECIFICATION. UNDER EXTREME STEERING MANEUVERS, SUCH AS TURNING THE STEERING WHEEL FULLY TO THE LEFT OR RIGHT WHILE BRAKING, THE HOSE MAY FRACTURE AND LEAK FLUID.
NHTSA 03V213000
Power Train › Automatic Transmission
Date: 05/06/2003
CERTAIN SPORT UTILITY VEHICLES FAIL TO COMPLY WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 114, "THEFT PROTECTION." THESE VEHICLES ARE EQUIPPED WITH A MECHANICAL OVERRIDE THAT COULD ALLOW THE IGNITION KEY TO BE REMOVED WITH THE SHIFT LEVER IN A POSITION OTH…
NHTSA 05V198000
Exterior Lighting › Turn Signal
Date: 05/05/2005
ON CERTAIN TRUCKS AND SPORT UTILITY VEHICLES, THE DRIVER WISHING TO SIGNAL A TURN BY MOVING THE DIRECTIONAL SIGNAL LEVER, (UP OR DOWN) MAY CAUSE THE FRONT MARKER/TURN LIGHTS AND REAR TURN LIGHTS TO FLASH IN A MANNER SIMILAR TO HAZARD WARNING, RATHER THAN FLASHING ON THE DESIRED S…
NHTSA 05V198000
Exterior Lighting › Turn Signal
Date: 05/05/2005
ON CERTAIN TRUCKS AND SPORT UTILITY VEHICLES, THE DRIVER WISHING TO SIGNAL A TURN BY MOVING THE DIRECTIONAL SIGNAL LEVER, (UP OR DOWN) MAY CAUSE THE FRONT MARKER/TURN LIGHTS AND REAR TURN LIGHTS TO FLASH IN A MANNER SIMILAR TO HAZARD WARNING, RATHER THAN FLASHING ON THE DESIRED S…
NHTSA 04V061000
Visibility › Windshield Wiper/Washer
Date: 04/02/2004
CERTAIN SPORT UTILITY VEHICLES HAVE WINDSHIELD WIPER SYSTEMS THAT WILL NOT TURN ON, CEASE OPERATION WHILE IN USE, FAIL TO TURN OFF/ON BY THEMSELVES (MOISTURE SENSITIVE WIPER SYSTEM), OR HAVE CONTINUOUS WINDSHIELD WASHER PUMP OPERATION BECAUSE THE PRESENCE OF WATER WITHIN THE WIPE…
NHTSA 05V035000
Visibility › Windshield
Date: 03/02/2005
CERTAIN SPORT UTILITY VEHICLES FAIL TO COMPLY WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 212, 'WINDSHIELD MOUNTING.' THE WINDSHIELD URETHANE BEAD MAY NOT HAVE ADHERED TO THE BODY IN CERTAIN AREAS DURING THE CURE PROCESS.
NHTSA 14V404000
Visibility › Power Window Devices And Controls
Date: 02/07/2014
General Motors LLC (GM) is recalling certain model year 2005-2007 SAAB 9-7x; 2006 Chevrolet Trailblazer EXT and GMC Envoy XL; and 2006-2007 Chevrolet Trailblazer, GMC Envoy, Buick Rainier and Isuzu Ascender vehicles. Fluid may enter the driver's door master power window switch m…
NHTSA 14V404000
Visibility › Power Window Devices And Controls
Date: 02/07/2014
General Motors LLC (GM) is recalling certain model year 2005-2007 SAAB 9-7x; 2006 Chevrolet Trailblazer EXT and GMC Envoy XL; and 2006-2007 Chevrolet Trailblazer, GMC Envoy, Buick Rainier and Isuzu Ascender vehicles. Fluid may enter the driver's door master power window switch m…
COMMON OBD2 CODES TO CHECK
P0420
P0420
Powertrain
P0171
P0171
Powertrain
P0300
P0300
Powertrain
P0128
P0128
Powertrain
P0455
P0455
Powertrain
P0700
P0700
Transmission
P0442
P0442
Powertrain
P0172
P0172
Powertrain
P0401
P0401
Powertrain
All documented fault codes for this vehicle
The most documented diagnostic codes for this model, by system and severity. Tap a code for the full guide.
P0455
powertrain
LOW⏱ 0.62h avgP0442
powertrain
LOW⏱ 0.62h avgP0440
powertrain
LOW⏱ 0.78h avgP0420
powertrain
MEDIUM⏱ 1.24h avgP0300
powertrain
HIGH⏱ 1.22h avgP0172
powertrain
MEDIUM⏱ 1.13h avgP0171
powertrain
MEDIUM⏱ 0.95h avgP0730
transmission
MEDIUM⏱ 1.25h avgP0700
transmission
HIGH⏱ 1.25h avgP0401
powertrain
MEDIUM⏱ 1.25h avgP0011
powertrain
MEDIUM⏱ 5.4h avgU0100
network
HIGHP0562
electrical
MEDIUM⏱ 0.58h avgP0128
powertrain
MEDIUM⏱ 0.88h avg
DASHBOARD WARNING LIGHTS — UNIVERSAL GUIDE
53 warning lights classified by urgency. Appears on your vehicle? Check the urgency level.
Show all dashboard warning lights
🔴 IMMEDIATE STOP — pull over
Oil Pressure WarningEngine
Engine Temperature WarningCooling
Brake System WarningBrakes
Immobilizer / Key FaultSecurity
🟠 WARNING — check soon
Malfunction Indicator Light (MIL) / Check EngineEngine
Diesel Particulate Filter (DPF)Emissions
Battery / Charging SystemElectrical
Low Fuel WarningFuel
ABS WarningBrakes
Brake Pad Wear IndicatorBrakes
Electronic Parking Brake (EPB)Brakes
Power Steering WarningSteering
ESC / Stability Control FaultChassis
Tire Pressure Warning (TPMS)Chassis
Transmission Temperature WarningTransmission
Transmission / Gearbox FaultTransmission
Airbag / SRS WarningActive safety
EGR / Exhaust Gas Recirculation FaultEmissions
Catalytic Converter / Emissions FaultEmissions
AdBlue / DEF Level LowEmissions
Coolant Level LowCooling
Hybrid / EV System WarningHybrid
EV Charge System FaultHybrid
12V Battery (Hybrid/EV Auxiliary)Hybrid
Suspension Fault / Air SuspensionSuspension
CAN Bus / Network Communication FaultNetwork
Water in Fuel FilterFuel
Diesel Injector FaultFuel
Steering Angle Sensor FaultSteering
Turbo / Boost Pressure FaultEngine
Regenerative Braking Fault (Hybrid/EV)Hybrid
🟡 MONITOR
Fuel Cap / Evap SystemEmissions
4WD / AWD SystemDrivetrain
Bulb Failure WarningLighting
Headlight Range / Leveling FaultLighting
Service / Maintenance DueMaintenance
A/C System FaultHvac
Clutch Wear WarningTransmission
Cruise Control / ACC FaultADAS
🔵 INFORMATION
Engine Temperature Low (Blue)Cooling
Glow Plug / Diesel PreheatEngine
Traction Control / ESC OffChassis
Seatbelt ReminderActive safety
Rear Fog Light IndicatorLighting
Lane Departure / LDWS WarningADAS
Forward Collision Warning (FCW/AEB)ADAS
Blind Spot Monitor FaultADAS
Rear Parking Sensor / Camera FaultADAS
Windshield Washer Fluid LowMaintenance
Door Open WarningBody
Hood / Trunk Open WarningBody
Gear Shift Indicator (Manual)Transmission
Sport / Performance Mode ActiveTransmission
REPORTED COMPLAINTS & PROBLEMS (NHTSA)
95 owner complaints filed with the U.S. National Highway Traffic Safety Administration (NHTSA) for the Isuzu Ascender across model years 2003–2009. These are real, verified reports submitted by vehicle owners.
2 crash reports 2 fires 2 injuries
Complaints by model year (most reported first)
Model year 200460
Model year 200335
Most reported components (all years)
Electrical System43
Fuel System17
Exterior Lighting13
Gasoline13
Fuel/Propulsion System7
Service Brakes6
Sample reports
HAD AUTO TOWED TO MIDAS AFTER INABILITY TO START, ATTEMPTED JUMP START, UNSUCCESSFUL. BATTERY REPLACED ON 12/28/15. DROVE AUTO NEXT SEVERAL DAYS AND ON 12/30/15 DROVE TO PICK UP MY HUSBAND, SHUT OFF CAR IN PARK. UNABLE TO START VEHICLE A… (MY 2004)
SERVICE ENGINE LIGHT REMAINS ON, SERVICE DEPARTMENT UNABLE TO FIX PROBLEM. *TR (MY 2004)
THE REAR WINDOW POPPED AND EXPLODE ON ITS OWN, POSSIBLY INJURING THE BACK PASSENGER. TOOK TO THE DEALER FOR REPAIRS TWICE, BUT THE CAUSE WAS UNDETERMINED.*AK (MY 2004)
CAR PAID IS PILLING OFF WE PAINT THIS CAR 3 TIMES AND A THOSES THE SAMETHING ALL CLEAR PAINT WHIT IN 3-5 MONTH START TO COME OFF CAN ANY BODY TELL ME IS GM HAD A RECAL FOR THIS (MY 2004)
Source: NHTSA complaints database (U.S. data.gov). Figures cover production years 2003–2009.
Frequently Asked Questions
Does the Isuzu Ascender have any safety recalls?
Yes — 18 official NHTSA recall campaign(s) affect this model, mainly: EXTERIOR LIGHTING:HEADLIGHTS, VISIBILITY:POWER WINDOW DEVICES AND CONTROLS, ELECTRICAL SYSTEM. Check the recalls section for your exact year/VIN.
What does fault code P0300 mean on the Isuzu Ascender?
Random/Multiple Cylinder Misfire Detected This code is among the most documented for this model — tap it in the OBD2 section for the full step-by-step guide.
What does fault code P0128 mean on the Isuzu Ascender?
Coolant temperature below thermostat regulating temperature — thermostat stuck open or faulty This code is among the most documented for this model — tap it in the OBD2 section for the full step-by-step guide.
What does fault code P0011 mean on the Isuzu Ascender?
A Camshaft Position Timing Over-Advanced or System Performance (Bank 1) This code is among the most documented for this model — tap it in the OBD2 section for the full step-by-step guide.
Are fuel system problems common on the Isuzu Ascender?
Yes — 20 of 91 real owner reports filed with NHTSA mention the fuel system. One owner reported: “SMELL OF GASOLINE AND DRIPPING UNDERNEATH REAR BENEATH FUEL TANK (DRIVER'S SIDE), WHEN STARTING. PROBLEM WAS FOUND TO BE THE FUEL PUMP MODULE AT THE LINE :OUTPUT SIDE OF PUMP. REPLACED FUEL PUMP MOD…” See the owner-reported complaints section below for more.
Are engine problems common on the Isuzu Ascender?
Yes — 20 of 91 real owner reports filed with NHTSA mention the engine. One owner reported: “TL* THE CONTACT OWNS A 2003 ISUZU ASCENDER. HE STATED THAT INTERMITTENTLY WHILE DRIVING 50 MPH THE 'SES' AND 'CHECK ENGINE' WARNING LIGHT ILLUMINATED ON THE INSTRUMENT PANEL, THEN THE VEHICLE STALLE…” See the owner-reported complaints section below for more.
Are electrical problems common on the Isuzu Ascender?
Yes — 36 of 91 real owner reports filed with NHTSA mention the electrical. One owner reported: “TL* THE CONTACT OWNS A 2003 ISUZU ASCENDER. HE STATED THAT INTERMITTENTLY WHILE DRIVING 50 MPH THE 'SES' AND 'CHECK ENGINE' WARNING LIGHT ILLUMINATED ON THE INSTRUMENT PANEL, THEN THE VEHICLE STALLE…” See the owner-reported complaints section below for more.
Which OBD2 fault codes are commonly documented for the Isuzu Ascender (2003–2009)?
Commonly documented OBD2 codes across many vehicles include: P0420, P0300, P0171. Find the full description, likely causes and estimated repair costs in the OBD2 Codes section on this page.
How often should the Isuzu Ascender (2003–2009) be serviced?
Routine maintenance for the Isuzu Ascender (2003–2009) typically includes an oil change every 6,000–9,000 miles (10,000–15,000 km), an air filter every 12,000–18,000 miles (20,000–30,000 km) and a brake inspection every 12,000 miles (20,000 km). Check the full plan with specific intervals in the Scheduled Maintenance section on this page.
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