P0562 Code: Toyota Camry (2018-2024) - Causes, Symptoms & Fixes

No recalls found in NHTSA database.

Note on data: The real NHTSA data provided for Toyota Camry (2018-2024) shows one owner complaint (P0442, unrelated to P0562) and no recalls. There is no Camry-specific data in this dataset for P0562. The guide below combines the general meaning of P0562 with typical 2018-2024 Camry electrical/charging-system behavior, along with common diagnostic and repair approaches and 2025 pricing ranges. If you have a P0562 on a Camry, treat the steps as a structured method to identify if the issue is battery/charging related or a higher-level electrical fault.

CODE MEANING AND SEVERITY

• What P0562 means: P0562 is the OBD-II diagnostic code for "System Voltage Low." It indicates the Engine Control Module (ECM/ECU) is seeing voltage below the expected range from the 12-volt electrical system. This can affect engine management and many subsystems that rely on stable power.
• Why it matters on a Camry: Modern Camrys rely on a stable 12-volt supply to power the ECM, sensors, actuators, communication networks, and infotainment. A genuine low-voltage condition can cause drivability issues, intermittent starts, dashboard warning lights, and, in some cases, erroneous sensor readings.
• Severity: Moderate to potentially severe. A prolonged low-voltage condition can cause misreads, stalling, rough idle, failed starts, or other electrical faults. If the voltage is marginal, repeated cycling can eventually damage electrical components or modules. If you see P0562, also watch for related codes (e.g., P0561, P0563) and for the battery/charging system warning lights.

COMMON CAUSES ON TOYOTA CAMRY

• Weak or aging 12V battery: A battery that no longer holds a solid charge is a very common cause of low system voltage.
• Failing or underperforming alternator: If the alternator isn’t charging properly, the 12V system voltage will drop, especially under load.
• Poor or corroded battery terminals and/or grounds: Loose connections, corrosion, or a missing ground strap lead to voltage drops.
• Wiring or harness issues in the charging/ECU circuits: Damaged, frayed, or high-resistance wiring between the alternator, battery, fuse blocks, and PCM can create voltage sag.
• Parasitic electrical drain: An accessory or module that draws power when the car is off can cause voltage to dip, especially if the battery is already weakened.
• Faulty power distribution components: Fusible links, main fuses, or ground bus issues can limit power delivery to the ECM and sensors.
• Faulty PCM/ECU or voltage regulator inside modules: A failing ECM/PCM or a defective internal regulator can misreport voltage or fail to regulate power correctly.
• Hybrid system considerations (if your Camry is a hybrid): The 12V system still powers many controls; a weak 12V battery or issues in the 12V-to-high-voltage system interface can contribute to low readings or related faults. High-voltage system faults can mask as low-voltage symptoms in some cases; thorough diagnosis is needed.

SYMPTOMS YOU MIGHT SEE WITH P0562 ON A CAMRY

• Check Engine Light (CEL) or Powertrain/ECU warning light illuminated.
• Battery/charging warning light on the dash, or fluctuating gauges.
• Dimming or flickering headlights, interior lights, or instrument cluster.
• Rough idle, stalling, or intermittent no-start condition.
• Poor engine performance, hesitation, or misfires in some cases.
• Infotainment resets or screens flickering when voltage dips.
• In some cases, accompanying codes such as P0561 (Voltage Too Low), P0563 (Voltage Too High), or P0xxx codes related to power/ground can appear.

DIAGNOSTIC STEPS (structured approach)

Important: Begin with the simplest, most obvious causes (battery and connections) before moving to PCM or wiring diagnosis. For safety, use proper PPE and follow Toyota service procedures. If you’re unsure, consult a qualified technician.

• Step 0: Read and record codes and data

  • Use a capable OBD-II scanner to confirm P0562 and check any freeze-frame data, live voltage readings, and any related codes (P0561, P0563, etc.).
  • Note vehicle condition (engine warm/cold, under load) when codes are logged.

• Step 1: Inspect battery condition and connections

  • Visually inspect battery terminals for corrosion, looseness, or damaged clamps.
  • Measure battery voltage with engine off: should be roughly 12.4–12.7 V for a healthy battery (even better when fully charged).
  • Perform a simple battery load test (many shops offer this; DIY testers exist). If voltage drops significantly under load, replace the battery.
  • Check for a swollen case or signs of aging.

• Step 2: Test the charging system with the engine running

  • With engine running and all accessories on (AC on, lights on), measure alternator output at the battery terminal.
  • Expected: roughly 13.8–14.8 V. If voltage is below ~13.5 V or above ~14.8–15 V consistently, there’s a charging issue or regulator fault.
  • Check for voltage drop across battery cables and fasteners while under load; measure both positive and ground paths.
  • Inspect the alternator belt tension and condition.

• Step 3: Inspect grounding and power feeds

  • Check the main battery ground strap to the engine block and chassis for looseness, corrosion, or damage.
  • Inspect engine/PCM power and ground wires for damage or loose connectors near the alternator, fuse box, and PCM.
  • Clean any corrosion from terminals, apply appropriate dielectric grease, and ensure a solid connection.

• Step 4: Check for parasitic draw

  • With the vehicle off, measure the current draw (parasitic load). Compare to the typical Camry spec (often a few tens of milliamps to a few hundred milliamps depending on modules, but consult the service manual).
  • If parasitic draw is excessive, identify the harness or module responsible and address the root cause.

• Step 5: Inspect fuses, fusible links, and power distribution

  • Check relevant fuses and fusible links related to the PCM, alternator, and main power feed. A blown fuse or degraded fusible link can cause voltage sag to the ECM.
  • Inspect the fuse box connections and any recently replaced fuses or aftermarket devices.

• Step 6: Evaluate the PCM/ECU and related circuitry

  • If battery and charging tests pass and wiring looks good, consider a PCM power/ground issue or internal fault.
  • Check 12V supply to the PCM and the PCM ground directly with a reference voltage test. Abnormal readings here can point to a PCM issue or a bad connection.
  • Look for any water ingress or corrosion in the engine bay that could affect electronics.

• Step 7: Consider vehicle behavior under load

  • If voltage only dips under heavy load (e.g., A/C on, headlights on, fans running), suspect charging system or wiring under load rather than a constant no-load issue.

• Step 8: If needed, involve a professional scan tool and service manuals

  • Some Camry-specific diagnostics require Toyota Techstream or OEM-level diagnostics to verify power/ground rails, module health, and EV/Hybrid interfaces, especially if the vehicle has hybrid components.

RELATED CODES

• P0561: System Voltage Too Low
• P0560: System Malfunction
• P0563: System Voltage Too High
• Other power/ground related codes that may appear in conjunction with P0562 (e.g., CAN bus or sensor-related codes) as the vehicle logs voltage fluctuations

REPAIR OPTIONS AND COSTS (2025 PRICES)

Prices are approximate and vary by region, dealer vs independent shop, and vehicle trim (including Hybrid variants). Labor rates differ; refer to local shops for exact quotes.

• Battery replacement (12V lead-acid, standard Camry)

  • Parts: $90–$180
  • Labor: $40–$120
  • Installed range: roughly $130–$300
  • Notes: If the battery is marginal or swollen, replacing it may resolve the issue.

• Alternator replacement

  • Parts: $180–$450
  • Labor: $120–$240
  • Installed range: roughly $300–$700
  • Notes: If the alternator is failing to charge, replacing it commonly resolves P0562.

• Battery terminals/ground repair

  • Parts: $10–$50 for terminals or cables
  • Labor: $30–$120
  • Installed range: $40–$170
  • Notes: Corrosion or loose connections are a frequent cause; often inexpensive to fix.

• Wiring harness or connector repair (charging/ECU circuits)

  • Parts: $0–$100 for connectors or harness pieces (varies)
  • Labor: $100–$400
  • Installed range: $100–$500
  • Notes: Repair costs depend on damage extent and whether wiring can be repaired or requires harness replacement.

• Parasitic drain diagnosis

  • Diagnostic charge: $80–$150 (some shops waive with repair)
  • Additional repair costs depend on the drain source (module, wiring, or fuse issues)

• PCM/ECU replacement (rare; as a last resort)

  • Parts: $300–$1,200
  • Labor: $200–$800
  • Installed range: $500–$2,000+
  • Programming: Purpose-built reprogramming may be needed, which adds cost
  • Notes: Only consider if voltage integrity is proven to originate from PCM and other sources are ruled out.

• Hybrid-specific considerations (Camry Hybrid)

  • 12V battery replacement cost remains similar, but some diagnostics may require specialized hybrid tools.
  • If the issue relates to the high-voltage system interface or battery conditioning, costs can be higher; professional handling is recommended.

• Diagnostic charges

  • Typical shop diagnostic fee: $80–$150 (some shops credit toward repair if you proceed)

DIY VERSUS PROFESSIONAL

• Do-it-yourself (DIY) tasks suitable for typical Camry owners:

  • Inspecting and cleaning battery terminals and clamps.
  • Checking basic battery voltage with a multimeter (engine off and running).
  • Basic fuses and fusible links inspection.
  • Checking for obvious wiring damage or corrosion around the battery and alternator.
  • Performing a simple parasitic draw check if you have the right tools and safety precautions.

• Tasks that are better left to professionals:

  • Thorough charging-system diagnosis under load with proper equipment.
  • Measuring exact voltage drop across power and ground paths with the vehicle running.
  • Testing and diagnosing the PCM power/ground references and CAN bus communication.
  • Any work on the high-voltage system (for Camry Hybrid) or complex wiring harness repairs.
  • Replacing or programming the PCM/ECU or BCM requires OEM-level software and procedures.

• Safety considerations:

  • Always disconnect the battery with the vehicle off and follow torque specs when reconnecting.
  • Be cautious around the hybrid system’s high-voltage components; only trained technicians should service those.

PREVENTION

• Regular battery health checks: Have the battery load-tested every 2–3 years or as part of routine maintenance; replace before failures occur.
• Keep terminals clean and tight: Periodically inspect and clean corrosion; apply appropriate terminal grease to prevent corrosion.
• Maintain the charging system: Have the alternator and charging voltage tested periodically, especially after any electrical fault or repeated dimming symptoms.
• Minimize parasitic drains: Avoid leaving accessories on for extended periods when the engine is off; fix any aftermarket devices that draw power.
• Use OEM or high-quality replacements: Use the correct battery type and alternator spec recommended by Toyota for Camry models.
• Inspect wiring and grounds: Regularly inspect the main grounding strap and power/ground wiring for wear, chafing, or corrosion.
• Avoid exposing the vehicle to extreme electrical loads: Heavy aftermarket audio systems, lighting, or other high-current devices can stress the charging system if not properly fused and wired.

Closing note

• The data provided from the real NHTSA dataset for Camry (2018-2024) does not include P0562 as a documented case, and there are no recalls listed. The diagnostic guide above uses general electrical-diagnosis best practices and typical Camry electrical-system behavior to help you approach a P0562 issue. If you are experiencing persistent P0562 symptoms, consider starting with the 12V battery and charging system checks, and consult a qualified technician if the issue persists or if you’re dealing with hybrid-related systems.