The Chevrolet HHR's most common problems involve the automatic transmission and electrical system, along with engine performance and suspension wear.
The HHR was produced by Chevrolet from 2006 to 2011, and owner reports, recall histories, and maintenance data highlight several recurring trouble spots across these years. This article surveys these commonly reported problems, what typically causes them, and how owners can address them.
Engine and Performance Issues
These problems affect everyday driving and fuel efficiency, and are among the most commonly reported by HHR owners.
- Engine misfires and rough idle, often linked to worn spark plugs and ignition coils or clogged fuel injectors.
- Hesitation, reduced power, or lugging during acceleration, sometimes tied to sensor faults or intake/airflow issues.
- Check engine light coming on due to faulty oxygen sensors, MAF/MAP sensors, or EVAP system faults.
- Cooling system problems that can lead to overheating in hot weather or heavy use, often due to radiator fans or thermostat issues.
- Declining fuel economy and emissions issues stemming from sensor faults or maintenance neglect.
Engine and performance issues are often addressable with routine maintenance, sensor replacements, and timely fuel-system cleaning, but may require diagnostics to pinpoint the exact fault.
Electrical, Comfort, and Interior Systems
Electrical gremlins and interior system faults are commonly reported and can affect usability and safety.
- Intermittent or persistent warning lights, including the check engine, airbag, or ABS, often due to faulty sensors or loose connections.
- Power window regulators or motors failing, leading to slow operation or windows that won’t go up or down.
- Blower motor resistor or HVAC control failures causing weak or no heat/AC in certain speeds.
- Instrument cluster anomalies such as flickering gauges or dead speedometer/tachometer.
- Air conditioning performance loss or electrical issues affecting climate controls.
Electrical and interior issues can be intermittent; diagnosing with a scan tool and inspecting fuses, wiring, and grounds is often necessary.
Drivetrain, Transmission, and Handling
Transmission and drivetrain problems are a key concern for many HHR owners, as the model used GM components common to several families.
- Automatic transmission shifting problems, including harsh shifts, slipping, or delayed engagement, particularly in older automatics.
- Transmission fluid leaks or low fluid level from pan gaskets, cooler lines, or seals, potentially leading to overheating or failure if ignored.
- CV axle wear causing vibration or clunking noises during acceleration or turning.
- Drivetrain vibrations or noises at highway speeds due to worn joints or bearings.
Addressing transmission or drivetrain concerns often requires service from a qualified technician, including potential fluid changes, gasket replacements, or component repairs, depending on symptoms.
Suspension and Steering
Common wear items in the suspension and steering can affect ride quality and handling.
- Worn front suspension components such as bushings, ball joints, or struts leading to clunks and poor ride quality.
- Tie rod ends and control arm bushings wear, causing excessive play or wandering steering.
- Power steering rack or pump leaks resulting in hard steering or reduced assist.
- Squeaks and noises from underbody components due to worn bushings or damaged mounts.
Regular inspection and prompt replacement of worn parts help maintain steering confidence and ride comfort.
Fuel System and Emissions
Fuel-system and emissions-related issues appear in owner reports and can trigger emissions-related codes.
- Fuel pump failure or intermittent fuel delivery problems, especially as mileage increases.
- EVAP system leaks or canister faults triggering check engine light.
- Oxygen sensor failures leading to poorer fuel economy or higher emissions.
- Catalytic converter issues reported in some cases with MIL/diagnostic trouble codes.
Fuel-system problems often require diagnostics with a scanner and possibly replacement of sensors or components like the fuel pump or EVAP parts.
Recall History and Maintenance Tips
Understanding recalls and staying on top of maintenance can help mitigate common problems with the HHR.
- Check NHTSA/GM recall databases for open or completed campaigns by VIN, including airbag, ignition, and fuel-system recalls.
- Keep up with routine maintenance: spark plugs, ignition coils, fuel filter, hoses, coolant, transmission fluid, and power-steering fluid.
- Inspect exhaust manifolds and gaskets for leaks, especially on early models with 2.4L engines.
- Monitor warning lights and seek professional diagnosis if they appear; early attention can prevent further damage.
Staying informed about recalls and maintaining regular service can reduce the frequency and severity of problems over the vehicle’s life.
How to Diagnose and Address Issues
For owners facing intermittent trouble, a structured approach can save time and money. Start with the basics: verify maintenance history, scan for codes, and inspect common wear items before diving into expensive repairs.
Consumers should also review recall status for their specific VIN and consult a trusted mechanic or dealership for vehicle-specific guidance, especially for engine, transmission, and electrical faults.
Summary
Across model years, the Chevrolet HHR tends to show a cluster of recurring issues rather than a single dominant flaw. The most frequently reported problems involve the drivetrain and transmission, engine performance, electrical and interior systems, and suspension wear. Regular maintenance, timely diagnostics, and staying current with recalls can help mitigate these issues and keep the HHR on the road longer.