Hummer H1 (1992–2006) — OBD2 Codes, Parts & Maintenance | TroubleAtlas

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Hummer H1 (1992–2006)
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HUMMER H1 (1992–2006): Full Technical Specs & OBD2 Diagnostics

By TroubleAtlas Technical Team · Updated 3 July 2026 · Cross-checked against 3 independent sources
Built 1992–2006 · all production years covered on this single page

6.5L V8 Diesel • Diesel

2006
Hummer H1 (1992–2006)

© Wikimedia Commons CC BY-SA

5 Common problems View details →
14 OBD2 codes View details →
1 Recalls / TSB View details →

Every figure on this Hummer H1 (1992–2006) 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 Hummer H1 (1992–2006) is powered by a 6.5L V8 Diesel 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 (1)
NHTSA 06V377000
Steering
Date: 02/10/2006
CERTAIN VEHICLES WERE ASSEMBLED WITH AN INCORRECT COMBINATION OF STEERING-GEAR-TO-FRAME ATTACHMENT HARDWARE.
🔴 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
Brake System WarningBrakes
K
Immobilizer / Key FaultSecurity
🟠 WARNING — check soon
Malfunction Indicator Light (MIL) / Check EngineEngine
Diesel Particulate Filter (DPF)Emissions
+−
Battery / Charging SystemElectrical
Low Fuel WarningFuel
!BRAKE
ABS WarningBrakes
!BRAKE
Brake Pad Wear IndicatorBrakes
!BRAKE
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
S
Suspension Fault / Air SuspensionSuspension
N
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
L
Bulb Failure WarningLighting
L
Headlight Range / Leveling FaultLighting
Service / Maintenance DueMaintenance
AC
A/C System FaultHvac
Clutch Wear WarningTransmission
A
Cruise Control / ACC FaultADAS
🔵 INFORMATION
Engine Temperature Low (Blue)Cooling
Glow Plug / Diesel PreheatEngine
Traction Control / ESC OffChassis
Seatbelt ReminderActive safety
L
Rear Fog Light IndicatorLighting
A
Lane Departure / LDWS WarningADAS
A
Forward Collision Warning (FCW/AEB)ADAS
A
Blind Spot Monitor FaultADAS
A
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)

6 owner complaints filed with the U.S. National Highway Traffic Safety Administration (NHTSA) for the Hummer H1 across model years 1992–2006. These are real, verified reports submitted by vehicle owners.

1 crash report
Complaints by model year (most reported first)
Model year 20034
Model year 20021
Model year 19991
Most reported components (all years)
Tires1
Service Brakes1
Hydraulic1
Electrical System1
Exterior Lighting1
Visibility1
Sample reports
2002 HUMMER H1 HAS A DEFECT/FAILURE PROBLEM WITH THE AC DELCO ACCELERATOR PEDAL. *NJ THE CONSUMER STATED HE IS ON HIS THIRD PEDAL REPLACEMENT WITHIN 2 1/2 YEARS. THE CONSUMER STATED THE ISSUE WAS RAPID ACCELERATION WHILE DRIVING OR TR… (MY 2002)
WHILE DRIVING 55 MPH VEHICLE STALLED. VEHICLE WAS TOWED TO THE DEALER FOR ANALYSIS, BUT MECHANIC COULD NOT RESOLVE THE PROBLEM. *AK (MY 2003)
THE BRIGHTNESS OF HEAD LAMPS ON BOTH SPORTS UTILITY VEHICLES AND MANY FOREIGN AUTOS IS A CONTINUOUS HAZARD. EVEN WHEN I'VE MOVED THE REAR VIEW MIRROR TO NIGHT SHADE, THE OUTSIDE MIRRORS BLIND ME. LARGE VEHICLES AWASH THE INTERIOR OF MY… (MY 2003)
ABS BRAKE FAULT LIGHT REPEATEDLY COMES ON. VEHICLE RETURNED TO DEALER (CERRITOS HUMMER) SEVEN (7) TIMES FOR REPAIR AND FAULT CONTINUES. *AK (MY 2003)

Source: NHTSA complaints database (U.S. data.gov). Figures cover production years 1992–2006.

Frequently Asked Questions

Does the Hummer H1 have any safety recalls?

Yes — 1 official NHTSA recall campaign(s) affect this model, mainly: STEERING. Check the recalls section for your exact year/VIN.

What does fault code P0300 mean on the Hummer H1?

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 Hummer H1?

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 Hummer H1?

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.

Which OBD2 fault codes are commonly documented for the Hummer H1 (1992–2006)?

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 Hummer H1 (1992–2006) be serviced?

Routine maintenance for the Hummer H1 (1992–2006) 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.

Considering buying a Hummer H1 (1992–2006)? Use this guide to check expected maintenance costs, the most reported fault codes and parts availability on the market. Real data, zero commercial estimates.

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