The 2008 Chevrolet Aveo owner manual states that a flashing malfunction indicator means a misfire has been detected. It warns that continued misfire can increase emissions and damage the emission-control system. Reduce speed, avoid hard acceleration and steep uphill grades, and obtain service if the condition continues. The supplied catalog lists four spark-plug alternatives for Aveo model years 2004–2008; verify the exact application before ordering.
What should you confirm before buying a part?
The supplied product records list Chevrolet Aveo applications for model years 2004 through 2008. Confirm the vehicle’s year and the catalog application before selecting a product. The 2008 owner-manual warning is specifically supported by the 2008 manual and should not be assumed to cover other years.
The supplied catalog notes a 0.044-inch gap for Denso IK20, K20PR-U11 and PK20PR11, and a 0.040-inch gap for Denso IK20TT#4. These are product application notes. Follow the exact vehicle and product instructions rather than changing a gap based only on this summary.
Each supplied product record lists four plugs per Chevrolet Aveo. Select one verified product application for the vehicle; the alternatives are not parts to install together.
The listed products have different designs and product notes: iridium, iridium twin-tip, U-groove and double-platinum options. They are distinct catalog alternatives, not year-specific choices or guaranteed performance upgrades. Select only the option whose application and instructions match the vehicle.
Use the exact year, model and application information shown in the catalog before ordering.
Which symptoms need further diagnosis?
The Chevrolet parts listing associates worn spark plugs with hard starting, hesitation, cutting out and loss of acceleration. These symptoms do not prove that the plugs are the cause. Inspection and qualified diagnosis are needed before replacing parts.
For the 2008 Aveo, the owner manual states that a flashing malfunction indicator means a misfire has been detected. Reduce speed, avoid hard acceleration and steep uphill grades, and obtain service if the condition continues.
Oil or heavy fouling is an inspection finding, not a complete diagnosis. Have the cause and the affected parts evaluated before assuming that replacing a plug will resolve the condition.
If the symptom continues after plug replacement, stop substituting parts and obtain a qualified diagnosis. The supplied evidence does not establish which other vehicle component may be responsible.
A catalog option is not a diagnosis or a promise that replacement will solve the complaint.
What does this system do?
A spark plug is an ignition-system component. The supplied Chevrolet parts listing associates worn plugs with hard starting, hesitation, cutting out and loss of acceleration, and recommends inspecting spark-plug wires when replacing plugs. Those facts do not establish that a plug is responsible for every misfire or rough-running complaint.
What can you check safely first?
If the check-engine light is flashing on a 2008 Aveo, reduce speed, avoid hard acceleration and steep uphill grades, and obtain service if the condition continues. Use the exact vehicle and spark-plug manufacturer instructions for inspection, gap verification and installation. If diagnosis or repair is beyond safe owner-level work, use a qualified technician.
Which part numbers are worth checking?
Match one appropriate option to the diagnosed fault and exact vehicle. These may be alternatives for different years or equipment; they are not a list of parts to replace together.
| Part number | Catalog description | Verified catalog years — restrictions below |
|---|---|---|
| IK20 | Denso Spark Plug IK20 | 2004, 2005, 2006, 2007, 2008 |
| IK20TT#4 | Denso Spark Plug IK20TT#4 | 2004, 2005, 2006, 2007, 2008 |
| K20PR-U11 | Denso Spark Plug K20PR-U11 | 2004, 2005, 2006, 2007, 2008 |
| PK20PR11 | Denso Spark Plug PK20PR11 | 2004, 2005, 2006, 2007, 2008 |
What else should be inspected?
Owner reports can describe symptoms, but they do not diagnose an individual Aveo. The supplied Chevrolet parts guidance recommends inspecting spark-plug wires when replacing plugs and replacing dirty or fouled plugs rather than cleaning them. Have recurring symptoms or contamination evaluated rather than assuming the plug is the complete repair.
Installation and service precautions
Use the exact manufacturer procedure for the vehicle and selected plug. Compare the product application before installation, avoid forcing or cross-threading the plug, and use the specified tightening procedure. If the symptom remains or the work is outside safe owner-level inspection, seek qualified service.
Use the manufacturer procedure for the exact Aveo year and configuration. Do not substitute unsupported general advice for that procedure.
Use a qualified automotive technician when diagnosis or repair exceeds safe owner-level inspection. Avoid energized equipment and do not bypass safety devices.
Which vehicle applications are verified?
The catalog records below belong to each individual part number. Notes, engine, trim and equipment restrictions apply only to the associated entry. Confirm the VIN privately with XPart Supply where the application is uncertain.
IK20 — Chevrolet Aveo catalog applications
2004, 2005, 2006, 2007, 2008 Chevrolet Aveo
Catalog note: Gap 0.044, Iridium Power - Performance Upgrade with World's Smallest Center Electrode (0.4 mm Dia.) & Tapered Tip Patented U-Groove Design & Patented Ir Alloy (90% Ir)
IK20TT#4 — Chevrolet Aveo catalog applications
2004, 2005, 2006, 2007, 2008 Chevrolet Aveo
Catalog note: Gap 0.040, Iridium TT - Ultimate Endurance and Power, 0.4mm Iridium and 0.7mm Platinum Twin-Tip Technology
K20PR-U11 — Chevrolet Aveo catalog applications
2004, 2005, 2006, 2007, 2008 Chevrolet Aveo
Catalog note: Gap 0.044, DENSO is O.E. Manufacturer / Resistor Plug with Patented U-Groove Design, OE
PK20PR11 — Chevrolet Aveo catalog applications
2004, 2005, 2006, 2007, 2008 Chevrolet Aveo
Catalog note: Gap 0.044, Double Platinum Plug - Extra Long Life Double Platinum Plug with Platinum Ground Strap
A listing here does not override the current product-page fitment or a manufacturer supersession.
Ask XPart Supply to confirm fitmentPro Tip
Record the vehicle year, selected product and relevant inspection findings for the technician. Choose by verified application and instructions, not by brand or electrode description alone.
Frequently Asked Questions
Can I keep driving with a flashing check-engine light on an Aveo?
For the 2008 Aveo, the owner manual says a flashing malfunction indicator means a misfire has been detected and warns of possible emission-control damage. Reduce speed, avoid hard acceleration and steep uphill grades, and obtain service if the condition continues.
Will replacing the spark plugs fix every Aveo misfire?
No. The supplied evidence associates worn plugs with several symptoms, but it does not show that every Aveo misfire is caused by plugs. Confirm the cause before replacing parts.
What if the new plugs become oily again?
Treat recurring oil or fouling as a finding requiring evaluation. The supplied evidence does not identify its cause, so obtain qualified diagnosis rather than repeatedly replacing plugs.
Which supplied plugs fit a Chevrolet Aveo?
The catalog lists Denso IK20, IK20TT#4, K20PR-U11 and PK20PR11 for Chevrolet Aveo model years 2004–2008, with four plugs per vehicle. They are distinct alternatives with different catalog notes and gaps. Verify the exact application before ordering or installing.
Should fouled plugs be cleaned and reused?
The supplied Chevrolet parts listing recommends replacing dirty or fouled plugs rather than cleaning them. If fouling returns, obtain qualified diagnosis of the underlying condition.
Related parts and vehicle guide
Technical references
Manufacturer and technical reference material informed this guide. Public discussion activity is used only to identify questions; individual reports are not proof of the cause on your vehicle.
2008 Chevrolet Aveo Owner Manual
Read the technical sourceACDelco Gold Gas Engine Ignition Spark Plug — Chevrolet Parts
Read the technical source