2004 Toyota Avalon Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2004 Toyota Avalon
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2004 Toyota Avalon ProblemsIgnition Coil May Fail After 100,000 Miles
On higher mileage vehicles, an engine misfire may develop and/or the Check Engine Light may illuminate due to a failed ignition coil. It is not uncommon to replace all the coils when the first one fails in order to prevent return trips to the repair shop.
The Evaporative system may have problems with the vapor canister releasing charcoal pellets that plug the vent valve. Typically a Code P0441, P0442 and P0446 will be set. The key code is the P0446 which is a vent valve electrical failure. The proper repair is to replace the entire canister with all the valves as a unit. This is located on top of the fuel tank and is expensive. Our Technicians tell us that for awhile Toyota was covering these problems, but this may have changed. It would not hurt to call the dealer if this problem occurs to see if Toyota is still helping with these repairs.
Sludge can build up in the engine because Toyota did not recommend frequent enough oil changes. Lexus will sometimes offer a discount on cleaning the engine if necessary. Owners who changed their oil every 3,000 miles did not experience these problems. This sludge build up can lead to excessive oil consumption.
2004 Toyota Avalon QuestionsENGINE LIGHTS ON. CYLINDER 2 MISFIRE(P0302) AND 02 HEATER CIRCUIT(P0155) ADVICE (1 answer)
I WISH TO REPAIR THE TWO FAULTS MENTIONED ABOVE
2004 Toyota Avalon RecallsUnexpected Airbag Deployment
The airbag control module can fail prematurely due to electrical noise beyond the tolerance it was designed for. As a result the front airbags, side airbags, and/or seatbelt pretensioners could deploy inadvertently while the vehicle is being operated, increasing the risk of personal injury and/or a crash. Dealers will replace the airbag control module and front and/or side impact sensors as required to correct this concern.
Circuits in the supplemental restraint system may short, resulting in damage that may unintentionally deploy the front air bags and / or seat belt pretensioners. Dealers will install a noise filter between the air bag control module and the affected wiring harness free of charge to resolve the concern.
The amount of adhesive applied between the inner and outer parts of the crankshaft pulley may be inadequate. If this is the case, the outer ring may become misaligned and/or not properly rotate with the inner ring, causing an abnormal noise and/or illumination of the Check Engine Light. In some cases, the power steering belt could come off resulting in a loss of power steering assist, increasing the risk of a crash. Dealers will inspect the crankshaft pulley and replace it if necessary.