The expert technicians at Fremont Foreign Auto have worked on thousands of Toyota Avalons over the years. While the Avalon sedan has many virtues, a number of recurring electrical and mechanical problems have plagued certain model year ranges. As Toyota Avalon specialists, our ASE-certified technicians have expertly diagnosed and repaired the most common issues with these vehicles. We service customers from Fremont, Milpitas, Union City, Hayward and throughout the Bay Area region. If you own an Avalon that is experiencing any of these problems, bring it into our shop for professional diagnosis and repair services tailored to your needs.
#1 Fuel Pump Failures (2018-2020 Models)
Recent Avalon models have had problems with premature fuel pump failure, causing the engine to suddenly stall while driving. This dangerous issue leaves drivers stranded without warning. Diagnosing the problem involves checking fuel pressure and electrical connections to the in-tank pump itself. In most cases, replacing the entire fuel pump assembly is required to permanently fix the failure. Our technicians use our extensive Toyota factory tooling to properly diagnose fuel system issues. We also advise customers on steps they can take to extend fuel pump life. Proper maintenance like fuel injection cleaning helps remove debris that can damage pump components.
#2 Vapor Canister and Emissions Issues (1995-2004, 2006, 2011, 2015 Models)
A common issue stemming from the Avalon’s evaporative emissions control system involves problems with the vapor canister. Symptoms drivers may notice include illumination of the check engine light, fuel vapor smells inside the cabin, and failed smog inspections. Our diagnosis focuses on the integrity of the canister purge valve and carefully checking the EVAP system for leaks or blockages. The repair often requires replacing the canister itself and purge valve to restore proper function. Our techs also examine related components like the leak detection pump and fuel tank pressure sensor. We aim to fix the root cause, not just clear the check engine code.
#3 Engine Misfires and Oil Leaks (1995, 2010, 2012 Models)
Sporadic engine misfires, felt as hesitation or jolting while driving, point to ignition or fuel delivery problems. Typical culprits are worn out ignition coils, faulty engine control modules, deteriorated spark plug wires, or dirty fuel injectors. Oil leaks often accompany this issue as aging seals and gaskets fail. Our technicians methodically test and verify the operation of each component using our professional-grade scanners and lab scopes. We help customers understand the root cause and recommend replacing defective parts to permanently resolve drivability and oil leak concerns.
#4 Clogged Idle Air Control Valve (1995-2004, 2006 Models)
Avalons from this era had widespread issues with clogged idle air control (IAC) valves causing abnormally high idle speeds, especially when cold, along with poor throttle response and acceleration. Our techs are experts at diagnosing dirty IAC valves and providing thorough cleaning or replacement as needed to restore proper idle control and drivability. We also examine related components like the mass airflow and throttle position sensors that provide critical data to the engine computer to fine-tune idle speed.
#5 Oxygen Sensor Failures (1996-2008, 2012 Models)
The oxygen sensor is a critical emissions component that also helps optimize fuel efficiency and performance. When this sensor goes bad, drivers may notice rough engine operation, reduced gas mileage, and harsh transmission shifts. Our techs use professional-grade scanners to look for diagnostic trouble codes and monitor oxygen sensor output to determine if response time and voltage readings are within specifications. For faulty sensors, we recommend prompt replacement to restore engine and emissions performance. We only install original equipment or top-tier aftermarket oxygen sensors.
#6 Vehicle Speed Control Issues (2005-2008, 2013 Models)
Some 2000s era Avalons have exhibited problems with unexpected or uncontrolled acceleration and surging sensations while driving. Diagnosing this requires methodical testing of components like the accelerator pedal position sensors, electronic throttle control system, and engine computer programming logic and safety fail-safes. Our techs often uncover faulty sensors or throttle assemblies. Replacing defective components is key to fixing this serious safety hazard. We perform thorough post-repair test drives to confirm normal vehicle speed control operation.
#7 Steering Column Noises and Failures (2005-2008 Models)
For 2005-2008 Avalons, we have seen an elevated rate of complaints about steering column noises (clunks, squeaks) along with sudden failures causing complete loss of steering control. Our technicians carefully inspect the tilt/telescoping steering column assembly and locking lever mechanism for damage or excessive wear that can lead to failure. In most cases with these symptoms, we recommend replacement of the entire steering column rather than attempting repair of the internal components. This helps ensure the safety of the steering system.
In over 30 years as a leading auto repair shop serving Fremont and the entire Bay Area, our ASE-certified technicians have diagnosed and repaired a vast range of drivability, electrical and mechanical issues affecting Toyota Avalons across all model years. We’ve seen these vehicles from brand new to those with over 300,000 miles and fixed them all.
If your Avalon is experiencing any of the common problems discussed here, we have the experience, Toyota-specific technology, and commitment to service needed to accurately troubleshoot your vehicle’s issues and make necessary repairs. Contact Fremont Foreign Auto today to schedule service. We provide honest, expert service to customers from Fremont, Milpitas and throughout the Bay Area region.
