P0352 on 2010-2011 Toyota Camry 2.5L: Ignition Coil 'B' Circuit Causes and Fixes

What's Unique About the 2007-2011 Toyota Camry

The user-specified year range of 2007-2011 covers the XV40 generation Camry, but the 2AR-FE 2.5L engine was only introduced for the 2010 and 2011 model years, replacing the previous 2AZ-FE 2.4L engine. This guide is specific to the 2010-2011 models with the 2AR-FE. There are no major systemic issues or widespread TSBs related to ignition coil failures on this platform; failures are typically due to normal wear and tear over time and mileage. The repair is considered very simple, requiring only basic tools.

Generation note: The 2007-2011 Toyota Camry is a single generation (XV40). However, the specified 2AR-FE engine was only available in the 2010 and 2011 model years. This guide specifically applies to those two years.

Symptoms You May Notice

• Check Engine Light is on
• Traction control light may also illuminate (VSC light)
• Rough idle or engine vibrations
• Engine misfiring or stumbling, especially under load
• Noticeable loss of engine power and poor acceleration
• Engine may hesitate or feel like it's going to stall
• Engine is hard to start at times

Most Likely Causes

1. Failed Ignition Coil (Cylinder #2) 🔴 High Probability → Shop Ignition Coil Ignition coils are a common wear-and-tear item. Heat cycles and high voltage eventually cause the internal windings or the built-in igniter to fail. There is no specific design flaw on the 2AR-FE, but it's the most likely component to fail in this circuit and a known issue after 100,000 miles.
   How to confirm: Swap the ignition coil from cylinder #2 with another cylinder (e.g., cylinder #4). Clear the codes and drive the car. If the code changes to P0354 (for cylinder #4), the coil is confirmed bad. This is the most common and effective DIY diagnostic step. 🎬 Watch: How to test and fix code P0352 on your Camry.
   Typical fix: Replace the faulty ignition coil. It is often recommended to replace all four coils and spark plugs at the same time for preventative maintenance, especially on a higher-mileage vehicle. Applying a small amount of dielectric grease to the new coil boot is best practice.
   Est. part cost: $40-$80
2. Damaged Wiring or Connector 🟡 Medium Probability The plastic locking tab on the connector can become brittle from engine heat and break, leading to a loose connection. Wires can also be damaged by vibration or improper handling during previous repairs, causing an open or short in the circuit.
   How to confirm: Visually inspect the connector for cylinder #2's ignition coil. Look for cracked plastic, corroded pins, or pushed-out terminals. Wiggle the connector with the engine running to see if it affects the idle. If swapping the coil doesn't work, use a multimeter to check for 12V power, ground, and the IGT/IGF signal wire integrity between the coil connector and the ECM.
   Typical fix: If the connector is damaged, it can be replaced with a new pigtail. Damaged wires must be repaired by soldering and heat-shrinking, or by replacing the affected section of the harness.
   Est. part cost: $10-$25 for a connector pigtail
3. Worn or Fouled Spark Plug ⚪ Low Probability → Shop Spark Plug While a bad spark plug typically causes a misfire code (like P0302), a severely worn or fouled plug can increase the electrical load on the ignition coil, potentially contributing to its failure or mimicking a coil issue. It's less likely to be the direct cause of P0352 but should always be inspected when the coil is removed.
   How to confirm: Remove the spark plug from cylinder #2. Inspect it for excessive wear on the electrode, oil fouling, or carbon buildup. The standard gap for the OEM Denso SK16HR11 is 1.0-1.1 mm.
   Typical fix: Replace the spark plug. It is best practice to replace all four spark plugs at the same time using high-quality Iridium plugs like Denso or NGK.
   Est. part cost: $8-$20 per plug

Rare But Worth Checking

• Faulty Engine Control Module (ECM): → Shop Engine Control Module (ECM) This is very rare. The ECM's internal driver for the ignition coil can fail, but all other possibilities (coil, wiring, plugs) must be exhaustively ruled out first before condemning the ECM.

Diagnosis Steps

1. Read the codes with an OBD-II scanner to confirm P0352 and check for any other codes like P0302.
2. Locate cylinder #2 on the 2AR-FE engine. It is the second cylinder from the passenger side (front of the engine, where the belts are). The cylinder order is 1-2-3-4 from passenger to driver side.
3. Visually inspect the electrical connector and wiring going to the ignition coil on cylinder #2. Look for any signs of damage, corrosion, or a loose connection.
4. The easiest and most definitive test is to swap parts. Unplug and unbolt the ignition coil from cylinder #2 (using a 10mm socket) and swap it with the coil from an easily accessible cylinder, like #4 (driver's side).
5. Clear the trouble codes using the scanner. Disconnecting the battery for a few minutes can also clear codes.
6. Start the engine and let it idle for a minute or drive it briefly.
7. Re-scan for codes. If the code has moved to P0354 ('Ignition Coil 'D' Circuit'), the ignition coil you moved is faulty and needs to be replaced.
8. If the code P0352 returns, the problem is not the coil itself but is likely in the wiring harness or, in very rare cases, the ECM.
9. At this point, you would need a multimeter to test the wiring. Check for 12V power at the connector with the key on, check for good ground, and check for continuity on the signal wires between the coil connector and the ECM.
10. While the coil is out, it's a good idea to remove and inspect the spark plug in cylinder #2 for wear, damage, or oil fouling.

Parts You'll Likely Need

• Ignition Coil (OEM #90919-02258 (replaces 90919-02252)) — This is the most common failure point for a P0352 code. The internal electronics of the coil fail from heat and age. Note: 90919-A2005 is for a different engine family and is often confused, the correct part for the 2AR-FE is 90919-02258.
  Trusted brands: Denso (OEM), NGK, Bosch
  OEM price range: $90-$120
  Aftermarket price range: $40-$80
• Spark Plug (OEM #90919-01253 (Denso SK16HR11)) — It is highly recommended to replace the spark plug when replacing an ignition coil, as a worn plug can stress the new coil. They are typically replaced as a set of four. 🎬 Watch: Step-by-step guide to replacing spark plugs on the 2.5L engine.
  Trusted brands: Denso (OEM), NGK
  OEM price range: $15-$25
  Aftermarket price range: $8-$15

Related Codes That Often Appear With This One

• P0302 — P0302 means 'Cylinder 2 Misfire Detected'. Since P0352 indicates a fault in the ignition circuit for cylinder 2, a misfire is the direct result, and these two codes almost always appear together.
• P0351, P0353, P0354 — These are for cylinders 1, 3, and 4 respectively. Seeing multiple coil circuit codes simultaneously is rare and would point towards a systemic issue like a shared power/ground problem or a failing ECM, rather than multiple individual coil failures.

Mechanic-Grade Diagnostic Values

• Voltage at Coil Connector Pin 4 (+B) — expected: 12-14V with ignition ON, engine off.. Failure: No voltage points to an issue with the EFI relay, fuse, or the power feed wire.
• Resistance at Coil Connector Pin 3 (Ground) — expected: 0-1 Ohms continuity to a known good ground (e.g., battery negative terminal).. Failure: High resistance or an open circuit (OL) indicates a bad ground connection, which is a common cause of intermittent issues.
• Continuity of IGT2 Signal Wire — expected: Continuity (near 0 Ohms) between Pin 2 of the coil connector and Pin A12 of the ECM connector.. Failure: High resistance or an open circuit (OL) indicates a break in the IGT signal wire.
• Continuity of IGF2 Signal Wire — expected: Continuity (near 0 Ohms) between Pin 1 of the coil connector and Pin B27 of the ECM connector.. Failure: High resistance or an open circuit (OL) indicates a break in the IGF confirmation wire, which is the direct cause for setting P0352 codes.
• IGT and IGF Signal Waveform (Oscilloscope) — expected: With the engine running, the IGT signal should be a square wave from the ECM, and the IGF signal should be a corresponding square wave pulse sent back from the coil immediately after.. Failure: An IGT signal present with no corresponding IGF signal confirms the fault is isolated to the coil's internal igniter or the IGF wire itself.

Scan Tool Commands That Help

• Toyota Techstream: Active Test -> Control the Injection Volume for A/F Sensor — While not a direct ignition test, this can be used to force the engine to run lean or rich. If misfires (P0302) accompany P0352, observing how the misfire count responds can help differentiate between a fuel and spark issue, although P0352 strongly implies a spark problem.
• Toyota Techstream: Utility -> All Readiness — After a repair, this function allows you to check the status of the DTC judgment without a full drive cycle. You can idle the engine for 10 seconds and then use this utility to see if the P0352 test has run and passed, confirming the fix.

Wiring & Ground Locations

• Ignition Coil #2 Connector — On top of the valve cover, second ignition coil from the passenger side of the engine.. This is the primary connection point for all power, ground, and signal wires for the coil in question. Pin 1: IGF (Pink/Red), Pin 2: IGT2 (Black/White), Pin 3: Ground (White/Black), Pin 4: +12V Power (Black/Red).
• ECM Connector A, Pin A12 — At the Engine Control Module (ECM), which is located behind the glove box.. This is the specific pin where the ECM sends the IGT2 (Ignition Trigger) signal to coil #2. It is the starting point for the signal wire continuity test.
• ECM Connector B, Pin B27 — At the Engine Control Module (ECM), located behind the glove box.. This is the specific pin where the ECM receives the IGF2 (Ignition Confirmation) signal from coil #2. A break in the wire between the coil and this pin is a direct cause of code P0352.
• Engine Ground Strap (82286-06010) — Main ground strap connects the engine block/transmission to the chassis, typically near the driver's side motor mount or on the fender apron.. A poor engine ground can cause a voltage potential difference between the engine block (where the coils ground) and the chassis, leading to weak spark, erratic IGF signals, and multiple ignition-related codes. Always ensure this connection is clean and tight.
• Harness Chafe Point — The engine wiring harness often bends sharply near the valve cover as it routes toward the ignition coils.. The IGT and IGF wires can break internally at this bend due to engine vibration and heat over time. If a coil swap doesn't fix P0352, and the connector pins look good, this harness section is a prime suspect for an open wire.

OEM Part Supersession History

• 90919-02252 → 90919-02258 — Standard part revision and update by the manufacturer.
  Heads up: The new part number 90919-02258 is a direct replacement for the older 90919-02252 and is fully compatible.

Model Year Variations Within This Range

• 2007-2011: Some Camrys were manufactured in Japan (VIN starts with 'J') and others in the USA (VIN starts with '4'). There are reports that the ignition coils for Japan-built models are physically shorter than those for US-built models. While the part number 90919-02258 should be correct for the 2AR-FE, it is crucial to verify fitment using the VIN to avoid purchasing the wrong length coil.

Diagnostic Flowchart

Other Known Issues on This Vehicle

Issues unrelated to this code that are worth knowing about as an owner of this generation:

• Excessive Oil Consumption 🔴 High — A widely documented problem, particularly for the earlier 2AZ-FE engine, but some 2AR-FE owners also report issues. It is often caused by piston rings sticking with carbon. The issue was more formally addressed by Toyota for the 2.4L 2AZ-FE engine. (Ref: null)
• Torque Converter Shudder/Transmission Hesitation 🟠 Medium — Some owners report shuddering, jerking, or hesitation from the automatic transmission, particularly in 2010-2011 models. Toyota issued a TSB (T-SB-0094-11) for a similar issue on earlier models, which could involve a software update or torque converter replacement. (Ref: T-SB-0094-11 (for earlier models, but relevant))
• VVT-i Gear Rattle on Cold Start 🟡 Low — A brief rattling or knocking sound from the engine for a second or two on a cold start. This is often attributed to the VVT-i cam gear assembly. While alarming, it is generally not considered a critical failure point. (Ref: T-SB-0150-12 (related TSB for VVT gear))
• Water Pump Failure 🟠 Medium — Like many vehicles, the water pump is a component that can fail over time, typically after 80,000-100,000 miles. Failure can lead to coolant leaks and overheating if not addressed. (Ref: null)

Used vs. New Parts: Buying Guide for This Vehicle

When a used part is the smart pick: Almost never. Ignition coils are a high-wear electronic component with a finite lifespan determined by heat cycles and mileage. A used coil from a junkyard is likely to have a similar or higher number of cycles as the one that just failed, offering poor value and a high risk of premature failure.

Donor-vehicle mileage cap: roughly under 30000 miles for the part to have meaningful remaining life.

What to inspect on the donor part:

• Verify the part number on the coil itself matches the required OEM number (90919-02258).
• Inspect for any cracks in the plastic housing, especially around the top seal and the bolt-down tab.
• Check the electrical connector pins for any signs of corrosion, burning, or being pushed out.
• Look for signs of oil contamination on the coil boot, which might indicate the donor vehicle had a leaking valve cover gasket.

OEM-only on this vehicle (don't cheap out):

• Ignition Coil

Aftermarket brands forum-validated for this vehicle:

• Denso (this is the OEM supplier for Toyota, buying a Denso-branded coil is equivalent to OEM)
• NGK (a reputable OEM supplier for many other brands, considered a high-quality alternative)

Brands owners have reported issues with on this vehicle:

• Generic, unbranded parts from online marketplaces.
• Bosch (some mechanics report premature failure of Bosch coils specifically in Toyota applications).
• Store-brand coils (often have a high failure rate after only a few thousand miles).

Real Owner Stories

Aggregated from forums and TSBs cited above. Mileages and costs reflect what owners reported in those sources.

Documented NHTSA Reports

Related OBD-II Codes

• P0302 — Cylinder 2 Misfire Detected; often accompanies P0352 when the ignition coil circuit failure prevents the spark plug from firing.
• P0354 — Ignition Coil 'D' Circuit; this code will appear if you swap the faulty cylinder #2 coil to cylinder #4 for diagnostic testing.
• P0351 — Ignition Coil 'A' Circuit; relates to cylinder #1, sharing the same circuit logic and potential for connector/wiring failure as P0352.
• P0353 — Ignition Coil 'C' Circuit; relates to cylinder #3, sharing the same circuit logic and potential for connector/wiring failure as P0352.

Frequently Asked Questions