P0265 on 2009-2010 Saturn Outlook: Cylinder 2 Injector Circuit High Causes and Fixes

What's Unique About the 2009-2010 Saturn OUTLOOK

The 2009-2010 Saturn Outlook shares its 3.6L V6 engine and 'Lambda' platform with the GMC Acadia, Buick Enclave, and Chevrolet Traverse. This is significant because General Motors issued a Technical Service Bulletin (TSB #PIP4924D) for all these vehicles that specifically addresses a high probability of fuel injector codes, like P0265, being caused by the wiring harness rubbing through. Common chafe points include contact with the intake plenum, valve cover bolts, the EVAP purge solenoid bracket, and fuel lines. This known vulnerability makes a wiring inspection the most critical first step.

Diagnostic Flowchart

Tap your situation to follow the diagnostic path that matches what you're seeing on this vehicle.

Symptoms You May Notice

• Check Engine Light is on (may be flashing)
• Rough or shaking idle
• Engine misfire, which may feel like a stumble or hesitation
• Noticeable loss of power and poor acceleration
• Reduced fuel economy
• Smell of unburnt fuel from the exhaust

Most Likely Causes

1. Damaged Fuel Injector Wiring Harness 🔴 High Probability → Shop Engine Wiring Harness As documented in GM TSB #PIP4924D, the injector wiring harness is routed tightly and is known to chafe against the intake plenum, valve cover bolts, the corner of the cylinder head, or fuel lines, causing a short to voltage.
   How to confirm: With the engine off, carefully perform a detailed visual inspection of the entire fuel injector harness, particularly around Cylinder 2 (the front-most cylinder on the radiator side). Look for worn insulation, exposed copper wires, or scuff marks on the plastic conduit where it makes contact with metal engine parts.
   Typical fix: Repair the damaged section of the wire by splicing in a new piece using a weatherproof butt connector and heat-shrink tubing. Reroute the harness slightly or add protective conduit (anti-abrasion tape) to prevent future rubbing.
   Est. part cost: $10-$30
2. Faulty Cylinder 2 Fuel Injector 🟡 Medium Probability → Shop Fuel Injector The direct injection fuel injectors (LLT engine) operate under high pressure and can fail electrically over time, causing an internal short that leads to a 'circuit high' condition.
   How to confirm: Swap the cylinder 2 injector with an injector from another cylinder on the same bank (e.g., cylinder 4 or 6). Cylinder 2 is the first cylinder on the front bank, closest to the radiator. Clear the codes and drive the vehicle. If the code changes to P0269 (Cylinder 4) or P0271 (Cylinder 6), the injector is confirmed to be faulty. Alternatively, disconnect the injector and measure its resistance with a multimeter; a reading far outside the typical 11.8-12.6 ohm range indicates failure.
   Typical fix: Replace the failed fuel injector. It is required to replace the Teflon seal and O-ring 🎬 Watch: How to properly install and seat new fuel injectors. at the same time. Many mechanics advise replacing all injectors on the same bank, or all six, for balanced performance and to avoid future labor costs, especially on higher mileage vehicles.
   Est. part cost: $60-$150
3. Loose or Corroded Injector Connector ⚪ Low Probability Engine vibration over thousands of miles can cause the electrical connector pins to lose tension or back out, creating a poor connection that the PCM may interpret as a high circuit fault.
   How to confirm: Visually inspect the electrical connector at the cylinder 2 fuel injector. Check for bent, corroded, or backed-out pins. Ensure the connector is fully seated and the locking tab is secure. Wiggle the connector with the engine running to see if it induces a misfire.
   Typical fix: Clean the connector terminals with electrical contact cleaner. If the connector housing or pins are damaged, the connector pigtail will need to be replaced by splicing it into the harness.
   Est. part cost: $15-$40

Rare But Worth Checking

• Faulty Powertrain Control Module (PCM): → Shop Engine Control Module (ECM) This is the least likely cause. The internal driver circuit for the injector can fail and get stuck, causing a constant high voltage signal. This should only be considered after the wiring and injector have been definitively ruled out as the problem through testing.

Diagnosis Steps

1. Connect an OBD-II scanner to confirm P0265 is the active code 🎬 Watch: A step-by-step diagnostic guide for the P0265 code. and check for any other related codes like P0302 (Cylinder 2 Misfire).
2. Cylinder 2 Location: Identify Cylinder 2. On the transversely mounted 3.6L V6, it is the cylinder at the front of the engine (radiator side), closest to the passenger side of the vehicle. The front bank is Bank 2 (cylinders 2, 4, 6) and the rear bank is Bank 1 (cylinders 1, 3, 5).
3. Wiring Inspection: Following the guidance of TSB #PIP4924D, perform a thorough visual inspection of the fuel injector wiring harness. Check for chafing against the intake manifold, cylinder heads, fuel lines, and EVAP solenoid bracket.
4. Connector Inspection: Inspect the electrical connector on the cylinder 2 injector for damage, corrosion, or a loose fit. Ensure the pins are straight and fully seated.
5. Injector Swap Test: If no wiring damage is found, swap the cylinder 2 fuel injector with another easily accessible injector on the same bank (cylinder 4 or 6). This requires removing the upper intake manifold.
🎬 See this walkthrough on removing the manifold and injectors.
6. Confirm the Fault: Clear the codes, start the engine, and see if the fault code 'moves' to the new cylinder (e.g., P0269 for cylinder 4). If it does, the injector is faulty and needs replacement.
7. Circuit Test: If the code remains P0265 after the swap, the problem is in the wiring between the PCM and the injector. Use a multimeter to check for continuity on the control wire and check for a short to voltage (connect one lead to the injector control wire at the PCM connector and the other to a known good 12V source; there should be no continuity).
8. If both the injector and wiring are confirmed to be good, the PCM may be at fault, which requires professional diagnosis, possibly with an oscilloscope to view the injector driver signal.

Parts You'll Likely Need

• Fuel Injector (OEM #12638530 (superseded by 12669384)) — This is the part to replace if the fault follows the injector during a swap test, indicating an internal electrical failure.
  Trusted brands: ACDelco, Bosch
  OEM price range: $100-$150
  Aftermarket price range: $60-$100
• Upper Intake Manifold Gasket Set (OEM #Fel-Pro MS 97240-1) — Accessing the fuel injectors on the 3.6L V6 requires removing the upper intake manifold. The gaskets are single-use and must be replaced to prevent vacuum leaks upon reassembly.
  Trusted brands: ACDelco, Fel-Pro, Mahle
  OEM price range: $40-$60
  Aftermarket price range: $20-$40
• Fuel Injector Connector Pigtail (OEM #ACDelco PT2160) — If the electrical connector itself is damaged, corroded, or broken, a pigtail can be spliced into the main harness to create a secure connection without replacing the entire harness.
  Trusted brands: ACDelco, Dorman
  OEM price range: $25-$40
  Aftermarket price range: $15-$25

Related Codes That Often Appear With This One

• P0302 — P0302 indicates a misfire on cylinder 2. Since P0265 means the injector for cylinder 2 is not being controlled correctly, a misfire on that cylinder is a direct and expected consequence.
• P0202 — This is a more general code for 'Injector Circuit/Open - Cylinder 2'. It can appear alongside P0265 as the PCM tries to diagnose the nature of the electrical fault.
• P2149, P2152 — These codes relate to the entire injector group's supply voltage. A significant short in the harness causing P0265 could potentially affect the entire bank of injectors, triggering these related codes.

Technical Service Bulletins (TSBs) & Recalls

• PIP4924D: Warns of potential misfires and a wide range of fuel injector DTCs (including P0265) caused by the fuel injector wiring harness rubbing through against the intake manifold, valve covers, or fuel lines. It recommends careful inspection and repair of the harness.

Platform-Specific Known Issues

• A well-documented issue covered by GM Technical Service Bulletin #PIP4924D points to the fuel injector wiring harness chafing against engine components, causing a short circuit. This is a primary suspect for code P0265 on the Saturn Outlook and its platform mates.
• Owners on forums for the Lambda platform vehicles frequently report solving injector circuit codes by finding and repairing a rubbed-through wire, often avoiding the cost of a new injector.

Mechanic-Grade Diagnostic Values

• Fuel Injector Coil Resistance (LLT Engine) — expected: 11.8 - 12.6 Ohms. Failure: A reading significantly outside this range, or infinite resistance (open circuit), indicates a failed injector.
• Injector Supply Voltage (Key On, Engine Off) — expected: 11.5 - 12.5 Volts. Failure: Voltage below 10V points to an upstream wiring or power supply problem.
• Fuel Injector Balance Test Pressure Drop Variation — expected: Individual injector pressure drop should be within 20 kPa (3 psi) of the average.. Failure: A pressure drop significantly different from the average indicates a clogged or malfunctioning injector.

Scan Tool Commands That Help

• GM Tech 2 / GDS2: Fuel Injector Balance Test — This active test is used to identify poorly flowing or clogged injectors. The tool pulses each injector individually and measures the drop in fuel rail pressure. An inconsistent pressure drop for cylinder 2 would point towards a faulty injector.
• GM Tech 2 / GDS2: Cylinder Power Balance — This test helps confirm if a cylinder is not contributing power. The tool disables one injector at a time. If disabling cylinder 2 causes no change in engine idle or RPM, it confirms that the cylinder was already dead, likely due to the injector fault.

Wiring & Ground Locations

• ECM Connector X1, Pins 52 & 53 — At the Engine Control Module (ECM), which is typically located in the engine bay near the firewall.. These are the specific pins for the cylinder 2 injector. Pin 53 is the high-side driver (Dark Blue/White wire) and Pin 52 is the low-side control (Dark Blue wire). Testing for shorts or continuity at these pins can definitively isolate a wiring fault from a PCM fault.
• G101 — On the left side of the engine block.. This is a primary ground point for the Engine Control Module. A poor connection here can cause erratic behavior and incorrect voltage readings across multiple circuits, including the injector drivers.
• G110 — Located on the right rear of the engine, mounted to the back of the cylinder head.. This is another critical engine ground. Since the injector harness runs across the engine, ensuring all engine grounds are clean and secure is a crucial step in ruling out intermittent electrical issues.

Real Owner Repair Stories

• Mechanic report on Chevrolet Traverse (shared 3.6L engine) (Chevrolet Traverse with 3.6L V6) — P0265 and a noticeable engine misfire.
  ❌ Tried (didn't work) Initial diagnosis pointed towards a bad fuel injector.
  ✅ What actually fixed it A thorough harness inspection revealed the injector wiring had chafed against the metal high-pressure fuel line that runs across the engine. The wire was repaired and protected with conduit, which fixed the code.
• Owner report on a similar GM platform (GM vehicle with 3.6L V6) — Persistent injector circuit code.
  ❌ Tried (didn't work) Replacing the fuel injector., Checking for chafing along the main harness.
  ✅ What actually fixed it The final fix was finding a broken wire right at the injector's electrical connector itself. Splicing in a new connector pigtail resolved the issue permanently.

OEM Part Supersession History

• 12632255 → 12638530 — Standard part evolution and updates by the manufacturer.
• 12638530 → 12669384 — Standard part evolution and updates by the manufacturer.
  Heads up: This is the latest known part number. All listed numbers are considered interchangeable for this application.

Model Year Variations Within This Range

• 2009-2010: The 2009-2010 Saturn Outlook uses the 3.6L LLT V6 engine. Its direct fuel injectors have a high impedance, with a coil resistance of approximately 11.8-12.6 Ohms. This is critically different from the later 3.6L LFX engine (used in 2012+ GM models) which uses low impedance injectors with a resistance of around 1.2-1.8 Ohms. Using the incorrect resistance specification during diagnosis will lead to an incorrect conclusion.