What Does P0172 Mean on Your 2024 Toyota Camry?
The 2024 Toyota Camry uses a 2.5L Dynamic Force inline-4 engine producing 203 horsepower in gas-only trims, or a 2.5L Atkinson-cycle four-cylinder paired with electric motors in hybrid trims producing a combined 225 hp. P0172 means the engine control module (ECM) detected that Bank 1 is running too rich. On this inline-4 engine, Bank 1 is the only bank, so the entire engine is affected.
Since the 2024 Camry is essentially brand new, this code often points to a sensor defect, software issue, or assembly-related problem that should be covered under Toyota's factory warranty.
Common Symptoms You Might Notice
- Check engine light on
- Fuel economy lower than the 28/39 MPG rating
- Faint gasoline smell from exhaust
- Slightly rough idle
- Mild hesitation during acceleration
- Black deposits on tailpipe
Top Causes of P0172 on the 2024 Camry
- MAF Sensor Defect or Contamination (30% likelihood): The MAF sensor can have a factory defect or pick up contamination from assembly residue or early PCV system operation.
- ECM Software Issue (30% likelihood): Toyota may have a Technical Service Bulletin addressing fuel trim calibration on the 2024 Camry's Dynamic Force engine.
- Faulty Oxygen Sensor (20% likelihood): A manufacturing defect in the upstream O2 sensor can cause inaccurate readings that lead the ECM to over-fuel.
- Intake Air Leak (20% likelihood): A loose intake hose clamp, improperly seated air filter, or assembly-related gap in the intake tract can affect air metering.
How to Diagnose P0172 on Your 2024 Camry
- Take it to the dealer. The 2024 Camry is covered by Toyota's 3-year/36,000-mile basic warranty and 5-year/60,000-mile powertrain warranty. Let the dealer diagnose it at no cost.
- Ask about TSBs. Toyota often issues Technical Service Bulletins for new model year fuel trim concerns.
- If checking yourself, verify air filter installation. Open the air box and ensure the filter is properly seated.
- Check fuel trims with a scan tool. Negative LTFT values confirm a rich condition.
- Inspect intake connections. Check visible hoses and clamps for tightness.
Repair Options and Costs
- Warranty repair: $0 at Toyota dealership
- MAF sensor cleaning: $10 DIY or $60-$100 at a shop
- MAF sensor replacement: $130-$260 parts and labor
- ECM software update: $0-$150 (typically warranty-covered)
- O2 sensor replacement: $160-$340 parts and labor
- Intake leak repair: $40-$150
Can You DIY This Repair?
On a 2024 model, go to the dealer first. Warranty covers the repair at no cost. DIY work on a new vehicle could potentially complicate warranty claims. If outside warranty, MAF cleaning is an easy DIY task on the Camry's well-laid-out engine bay.
Prevention Tips
- Follow Toyota's maintenance schedule exactly
- Use OEM or Toyota-approved air filters
- Avoid aftermarket intake modifications
- Keep up with software updates at dealer visits
- Use 87 octane or higher fuel as specified