P0205 on 2010-2015 Chevrolet Camaro: Injector Circuit Malfunction Causes and Fixes

What's Unique About the 2010-2015 Chevrolet Camaro

For the 5th Generation Camaro, the V8 engine bay is a tight space. General Motors issued a Technical Service Bulletin (TSB #PIP4924D) that specifically calls out injector wiring harnesses rubbing through their insulation. The TSB warns to inspect where the harness can chafe against "the intake plenum, at valve cover bolts, against the fuel line and on the side of the head under the plenum." This known wiring issue makes harness inspection a critical first step on this platform, potentially saving you from replacing a perfectly good part. While a failed injector is always possible, this TSB makes a wiring fault a high-probability cause.

Symptoms You May Notice

• Check Engine Light is on
• Rough or shaking idle
• Engine misfire, sometimes felt as a pop or stumble
• Noticeable loss of power and poor acceleration
• Reduced fuel economy
• "Service StabiliTrak" message may appear on the dash along with the rough running, as the engine misfire can disable the traction control system.

Most Likely Causes

1. Chafed or Damaged Injector Wiring Harness 🔴 High Probability As documented in GM Technical Service Bulletin #PIP4924D, the fuel injector harness is known to rub against engine components. Specific chafe points mentioned are the intake plenum, valve cover bolts, fuel lines, and the side of the cylinder head.
   How to confirm: Visually inspect the entire length of the wiring harness leading to the cylinder 5 fuel injector. Pay close attention to the specific contact points listed in TSB #PIP4924D. Look for worn insulation, exposed wires, or sharp bends. Perform a "wiggle test" on the harness with the engine running to see if it affects the idle.
   Typical fix: Repair the damaged section of wire with a quality butt connector and heat shrink tubing. If the damage is extensive, the entire injector harness may need to be replaced. Secure the harness away from the contact point to prevent recurrence.
   Est. part cost: $5-$20 for wire repair supplies, $70-$150 for a new harness section.
2. Faulty Cylinder 5 Fuel Injector 🟡 Medium Probability Fuel injectors can fail electrically over time due to internal coil windings breaking down from heat and vibration. This is a common failure on many vehicles, including the Camaro.
   How to confirm: The most definitive test is to swap the cylinder 5 injector with an adjacent one (e.g., cylinder 3 or 7). Clear the codes and run the engine. If the code changes to P0203 or P0207, the injector is faulty. You can also check the injector's resistance with a multimeter; it should be around 12 ohms for a stock LS3/L99 injector. If it reads as an open circuit (infinite resistance) or is far out of spec, it has failed.
   Typical fix: Replace the faulty fuel injector. It is often recommended to replace the O-rings and seals for any injectors that are removed. There are owner accounts of successfully performing this repair at home.
   Est. part cost: $50-$120
3. Poor Connection at Injector Connector ⚪ Low Probability The plastic locking tabs on connectors can become brittle with age and heat cycles, leading to a loose connection. Pins can also corrode, though this is less common.
   How to confirm: Disconnect the electrical connector from the cylinder 5 injector. Inspect the terminals on both the injector and the connector for corrosion, dirt, or damage. Ensure the connector clicks securely into place and the locking tab is intact.
   Typical fix: Clean the terminals with electrical contact cleaner. If the connector is damaged or won't stay secure, replace the connector pigtail (ACDelco PT2160).
   Est. part cost: $10-$30 for a new connector pigtail.

Rare But Worth Checking

• Faulty Powertrain Control Module (PCM): This is the least likely cause. The PCM contains a driver circuit for each injector. While rare, this driver can fail. One owner on the Camaro5 forums considered this after extensive troubleshooting. All other possibilities, especially wiring and the injector itself, should be exhaustively ruled out before condemning the PCM.
• Rodent Damage: Owners have reported finding chewed wires on the injector harness, especially on cars that are stored for periods. If multiple injector codes for the same cylinder bank appear at once, this is a strong possibility.

Diagnosis Steps

1. Identify Cylinder 5: On the Camaro's V8, the cylinders are numbered 1-3-5-7 on the driver's side (front to back) and 2-4-6-8 on the passenger's side. Cylinder 5 is the third cylinder back on the driver's side.
2. Check for TSB Evidence: Before touching any parts, perform a thorough visual inspection of the injector wiring harness as described in TSB #PIP4924D. Look for areas where the harness might be rubbing against the intake manifold, valve cover bolts, fuel lines, or the side of the cylinder head.
3. Inspect the Connector: Disconnect the electrical connector at the cylinder 5 injector. Check for corrosion, bent pins, or a loose fit. Re-seat it firmly.
4. Use a Noid Light: Connect a noid light to the injector harness connector. Crank or start the engine. The light should flash steadily, indicating the PCM is sending a signal. If it doesn't flash or stays on constantly, the problem is in the wiring or the PCM.
5. Test the Injector: Turn the engine off. Set a multimeter to measure resistance (Ohms). Disconnect the injector and measure the resistance across its two terminals. It should be approximately 12 ohms. If it reads as an open circuit (infinite resistance) or is significantly different from an adjacent injector, the injector has failed internally.
6. Swap the Injector: If the wiring and resistance seem okay, swap the cylinder 5 injector with the one from cylinder 7. Clear the codes and start the engine. If the code returns as P0207, you have confirmed the injector is the problem. If the P0205 code returns, the problem is in the wiring or PCM.
7. Trace the Wiring: If the problem persists on cylinder 5 after the swap, you must carefully check the continuity of the two wires from the injector connector back to the PCM.

Parts You'll Likely Need

• Fuel Injector (OEM #12669384) — This is the most common part to fail internally, causing an open circuit. Superseded part numbers include 12611545, 12632255, and 12638530.
  Trusted brands: ACDelco (GM Genuine), Bosch, Delphi
  OEM price range: $80-$150
  Aftermarket price range: $40-$70
• Fuel Injector Connector Pigtail (OEM #PT2160) — If the locking tab is broken or terminals are corroded, the connector itself needs to be replaced to ensure a solid electrical connection. This is a USCAR style connector.
  Trusted brands: ACDelco
  OEM price range: $25-$40
  Aftermarket price range: $10-$20

Related Codes That Often Appear With This One

• P0305 — P0305 means 'Cylinder 5 Misfire Detected'. Since the P0205 code indicates the injector circuit isn't working, cylinder 5 isn't getting fuel, which directly causes a misfire. You will almost always see P0305 alongside P0205.
• P0201, P0203, P0207 — If you see other injector circuit codes for the same bank (Bank 1, driver's side), it strongly suggests a wiring harness issue common to that bank, such as rodent damage or a chafing point affecting multiple wires.

Technical Service Bulletins (TSBs) & Recalls

• PIP4924D: SES Light and Misfire With Injector Codes

Platform-Specific Known Issues

• TSB #PIP4924D: This bulletin is a key piece of evidence for the 2010-2015 Camaro. It explicitly warns technicians to inspect the fuel injector wiring harness for chafing against specific points: "the intake plenum, at valve cover bolts, against the fuel line and on the side of the head under the plenum." This known issue makes a wiring fault a high-probability cause for a P0205 code.

Mechanic-Grade Diagnostic Values

• Stock Fuel Injector Coil Resistance — expected: 12.0 - 12.5 ohms. Failure: An open circuit (infinite resistance) or a reading significantly outside the expected range indicates a failed injector coil.
• Injector Control Circuit Voltage (at connector, key on) — expected: ~12V (Battery Voltage) on the power wire (Pink on all injectors). Failure: Low or no voltage indicates a problem with the main power feed to the injector rail, not the specific cylinder 5 circuit.
• Injector Pulse Width (Scan Tool Live Data) — expected: Typically 1.5 - 3.5 ms at idle, should be consistent across all cylinders.. Failure: A value for cylinder 5 that is zero or drastically different from other cylinders points to a control-side problem.

Scan Tool Commands That Help

• GM GDS2 (or high-end bidirectional scanner): Injector Balance Test / Automated Injector Balance — This function allows the tool to individually disable each injector and measure the corresponding drop in fuel rail pressure or engine RPM. If disabling cylinder 5 causes no change in RPM or pressure drop, while other cylinders do, it confirms cylinder 5 was not contributing, likely due to an electrical or fuel delivery issue. It helps differentiate a circuit fault from a weak or clogged injector.

Wiring & Ground Locations

• Cylinder 5 Injector Control Wire — Pin 18 (Tan/White wire) on the black X1 connector of the Engine Control Module (ECM/PCM).. This is the specific wire that carries the pulsed ground signal from the PCM to the cylinder 5 fuel injector. A break, short-to-ground, or short-to-power on this wire is a direct cause of P0205.
• Injector Power Feed — A Pink wire provides ignition voltage to all 8 fuel injectors. This power is shared across the bank.. While a fault here would likely cause multiple injector codes (P0201, P0203, P0205, P0207), a poor connection at the splice feeding only cylinder 5 could be a rare cause.
• Engine Block Grounds — There are multiple grounds on the engine block, including one on the back of each cylinder head and one on the passenger side near the starter. A key ground strap runs from the driver's side block to the frame rail.. The PCM and its sensors rely on clean ground connections. A loose or corroded engine ground can introduce electrical noise and voltage drops, potentially causing the PCM to misinterpret the injector circuit's performance and set a false code.
• ECM/PCM Connectors — The PCM is located on the passenger side of the engine bay. It has two main connectors: X1 (black, 73-pin) and X2 (gray, 80-pin).. The injector control signal originates here. A bent pin, corrosion, or a poorly seated connector at the PCM itself can cause an open circuit fault for a single injector.

Real Owner Repair Stories

• Camaro5 Forum User (2010-2015 Chevrolet Camaro (specific year not stated)) — Persistent P0205 code (open circuit injector 5).
  ❌ Tried (didn't work) Owner's own troubleshooting., Installing a used eBay PCM (code returned).
  ✅ What actually fixed it A dealership ultimately resolved the issue by replacing the PCM with a new unit, replacing the #5 fuel injector, and replacing the pigtail wiring from the injector to the PCM. The final cost was $1300. It's noted the dealer initially could not communicate with the original PCM, suggesting it had failed completely.

OEM Part Supersession History

• 12576341 → 1257641, 0280158051 (Bosch P/N), 12611545, 12632255, 12638530, 12669384 (current) — Standard part evolution for minor manufacturing improvements or supplier changes.
  Heads up: All listed part numbers are considered direct replacements for the stock LS3/L99 application. The Bosch part number 0280158051 is the original manufacturer's number, while the GM numbers are for the same part in GM/ACDelco packaging.

Model Year Variations Within This Range

• 2010-2015: The LS3 (manual transmission) and L99 (automatic transmission) engines have internal differences (VVT and AFM/DOD on the L99), but they use the same fundamental fuel injectors and injector control strategy from the PCM. Diagnosis for P0205 is identical between the two.

Diagnostic Flowchart

Other Known Issues on This Vehicle

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

• L99 AFM Lifter Failure 🔴 High — A known but relatively rare issue on the L99 (automatic) engine where the Active Fuel Management lifters can collapse or fail, causing a persistent misfire and requiring significant engine work to repair.
• Timing Chain Tensioner Wear 🟠 Medium — The stock timing chain tensioner can wear out, particularly on higher mileage engines (100k+ miles), potentially leading to noise or, in worst cases, timing chain slack.
• Water Pump Leaks 🟡 Low — The water pump is a common failure point, often developing slow coolant leaks over time. This is a relatively minor and inexpensive repair.
• Bent Pushrods 🟠 Medium — While the pushrod design is simple, bent pushrods are a known issue, especially on modified engines or those that are driven hard. Symptoms include ticking noises and misfires.

Used vs. New Parts: Buying Guide for This Vehicle

When a used part is the smart pick: A used fuel injector from a reputable salvage yard can be a cost-effective option, especially if you can pull it yourself from a low-mileage donor vehicle. It is most sensible when trying to save money and you have the ability to test the part or have a return policy.

Donor-vehicle mileage cap: roughly under 75000 miles for the part to have meaningful remaining life.

What to inspect on the donor part:

• Check the donor vehicle's mileage; lower is always better.
• Inspect the injector's plastic connector for cracks or brittleness.
• Look for rust or corrosion on the injector body and electrical pins.
• If possible, test the resistance of the used injector with a multimeter before purchase; it should be around 12 ohms.

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

• While aftermarket injectors are available, using a genuine ACDelco/GM or original Bosch part ensures correct flow rates and electrical characteristics without needing tuning adjustments.

Aftermarket brands forum-validated for this vehicle:

• Bosch (Original Equipment Manufacturer)
• ACDelco (GM Genuine Parts)
• DeatschWerks
• Fuel Injector Clinic (FIC)

Brands owners have reported issues with on this vehicle:

• Unnamed, no-brand injectors from online marketplaces should be avoided, as their flow rates and reliability can be inconsistent, potentially causing further engine performance issues.

Real Owner Stories

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

Related OBD-II Codes

• P0202 — A similar injector circuit malfunction for cylinder 2; often appears alongside StabiliTrak warnings on the LS3 engine.
• P0203 — The injector circuit code for cylinder 3; if a P0205 code changes to P0203 after swapping injectors, it confirms the injector is faulty.
• P0207 — The injector circuit code for cylinder 7; used during diagnostic swapping to verify if the fault follows the injector or stays at the cylinder 5 wiring.
• P0302 — A cylinder 2 misfire code that can be triggered by a faulty injector circuit (P0202) on the Camaro.
• P0305 — A cylinder 5 misfire code that frequently accompanies P0205 when the injector circuit failure prevents the cylinder from firing correctly.

Frequently Asked Questions