P0463 on 2010-2015 Chevrolet Camaro: Fuel Level Sensor Circuit High Input Fixes

What's Unique About the 2010-2015 Chevrolet Camaro

The 2010-2015 fifth-generation Camaro uses a saddle-style fuel tank that straddles the driveshaft, requiring two separate fuel level sensors. Sensor 'A' (the primary sensor) is part of the fuel pump module on the driver's side, while Sensor 'B' is on the passenger's side. A P0463 code specifically points to the primary sensor or its circuit. The most common point of failure is the sensor's resistive card wearing out, a well-documented issue in many GM vehicles from this era. Unlike some sedans, there is no access panel under the rear seat; replacing either sensor requires dropping the fuel tank, 🎬 See this step-by-step fuel pump replacement walkthrough exhaust, and driveshaft.

Symptoms You May Notice

• Check Engine Light is on
• Fuel gauge reads incorrectly (e.g., stuck on full, empty, or fluctuates wildly)
• Low fuel warning light may be illuminated constantly
• Fuel range / 'Distance to Empty' display is inaccurate

Most Likely Causes

1. Faulty Fuel Level Sensor (Sending Unit) 🔴 High Probability → Shop Fuel Tank Sending Unit The resistive contacts on the fuel level sensor wear out over time, creating an open circuit. This is a very common failure on many GM platforms from this period due to the materials used on the sensor's resistor card.
   How to confirm: Test the sensor's resistance with a multimeter while moving the float arm. 🎬 Watch: How to test a GM fuel sending unit For most GM vehicles of this era, the resistance should sweep smoothly from approximately 40 ohms (empty) to 250 ohms (full). An open circuit (infinite resistance) or erratic readings confirm failure.
   Typical fix: Replace the faulty fuel level sensor. On the Camaro, the primary sensor (Sensor 'A') is integrated into the driver's side fuel pump module. The sensor can sometimes be purchased separately, but it is often replaced as a complete module.
   Est. part cost: $75 - $250
2. Damaged Wiring or Loose Connection 🟡 Medium Probability The wiring harness running to the fuel tank is exposed under the vehicle and can be damaged by road debris or corrosion. A forum user on a GM truck forum with the same code reported rodents chewing through the wires near the tank, which is a plausible scenario for the Camaro as well.
   How to confirm: Visually inspect the wiring harness from the fuel tank to the main body for any breaks, chafing, or corrosion at the connectors. Perform a continuity test on the signal and ground wires.
   Typical fix: Repair the damaged section of the wiring harness or clean/replace the corroded connector.
   Est. part cost: $10 - $50
3. Poor Ground Connection ⚪ Low Probability
   How to confirm: Locate the ground strap for the fuel tank and ensure it is clean, tight, and free of corrosion. Test for high resistance between the sensor's ground terminal and the vehicle chassis.
   Typical fix: Clean the grounding point on the chassis and re-secure the ground strap.
   Est. part cost: $1 - $10

Rare But Worth Checking

• Faulty Powertrain Control Module (PCM) or Body Control Module (BCM): This is extremely rare. Before suspecting the PCM or BCM, all other possibilities, including the sensor, wiring, and grounds, must be exhaustively ruled out. A faulty module is the least likely cause.
• Faulty Fuel Pump Driver Control Module (FPCM): → Shop Fuel Pump While less common for an isolated P0463, a failing FPCM can cause various fuel system-related codes and erratic behavior. It's a known issue on this platform, though typically associated with codes like P069E.

Diagnosis Steps

1. Scan the vehicle's computer for P0463 and any other related codes. Confirm P0463 is the primary code.
2. Use a scan tool with live data to observe the voltage reading from Fuel Level Sensor 1 (or A). A reading that is stuck high (typically near 5 volts) confirms the PCM's observation.
3. Perform a visual inspection of the wiring harness leading to the fuel tank. Look for obvious signs of damage, corrosion, or loose connections, paying close attention to areas near the exhaust or suspension components.
4. To access the fuel pump and sensor connectors, the fuel tank must be lowered. This involves removing the exhaust system and driveshaft for clearance.
5. Once accessible, disconnect the fuel level sensor connector. Check for a 5-volt reference and a good ground at the connector with a multimeter to ensure circuit integrity from the PCM.
6. If the circuit is good, remove the fuel pump module/sending unit from the driver's side of the tank.
7. Test the fuel level sensor itself by measuring its resistance while manually moving the float arm. The resistance should change smoothly from ~40Ω (empty) to ~250Ω (full). If it reads open (OL) or has dead spots, the sensor is faulty.
8. If the sensor tests good, the problem is likely in the wiring harness. Perform a pin-to-pin continuity and resistance test of the harness between the tank and the BCM/PCM.

Parts You'll Likely Need

• Fuel Level Sensor (OEM #13592330) — This is the most common failure point for the P0463 code. The internal resistor wears out, causing an open circuit and a high voltage signal. This part number corresponds to the sensor for the right (passenger) side, which is Sensor 'B', but is often cited in relation to fuel level issues. The primary sensor is typically part of the main pump module.
  Trusted brands: ACDelco, GM Genuine Parts
  OEM price range: $75 - $140
  Aftermarket price range: $50 - $100
• Fuel Pump Module Assembly (V6) (OEM #13592337) — For the 3.6L V6 models, the primary fuel level sensor (Sensor 'A') is integrated with the fuel pump module. Replacing the entire assembly is often easier and addresses the fuel pump as a preventative measure. This part number supersedes 13577471, 13585453, and 19208721.
  Trusted brands: ACDelco, Delphi
  OEM price range: $250 - $400
  Aftermarket price range: $150 - $300
• Fuel Pump Module Assembly (V8) (OEM #13592335) — For the 6.2L V8 models (SS), the aprimary fuel level sensor (Sensor 'A') is integrated with the fuel pump module. This part number is specific to the V8 and supersedes 13577475, 13585454, and 19208719.
  Trusted brands: ACDelco, Delphi
  OEM price range: $250 - $400
  Aftermarket price range: $150 - $300

Related Codes That Often Appear With This One

• P0462 — This is the opposite code, 'Fuel Level Sensor Circuit Low Input.' Seeing both codes intermittently can point to a failing sensor with an erratic signal that is shorting out and opening up.
• P2068 — This code refers to 'Fuel Level Sensor 'B' Circuit High'. Since the Camaro has two sensors, seeing both P0463 and P2068 together strongly indicates a wiring or ground issue common to both sensors, or a simultaneous failure of both sending units.

Technical Service Bulletins (TSBs) & Recalls

• 17-NA-204: While for Silverado/Sierra trucks, this GM bulletin addresses a range of fuel level sensor codes including P0463. It acknowledges issues with the in-tank fuel pump module causing inaccurate gauge readings, indicating a known pattern of component failure across GM products of the era.
• 18-NA-365: This bulletin for other GM vehicles also lists P0463 and points to a blocked transfer jet in the primary fuel pump module. While not specific to the Camaro, it shows that fuel transfer issues within the saddle tank can also trigger these codes.

Platform-Specific Known Issues

• No Under-Seat Access Panel: Unlike many other vehicles with saddle tanks, the 5th Gen Camaro does not have an access panel under the rear seat cushion. Service of either fuel level sensor or the fuel pump requires the fuel tank to be dropped from underneath the vehicle, which significantly increases labor time and complexity.
• Owner Experience on Camaro5 Forum: A thread titled 'Fuel gauge problem' on Camaro5.com details a user's experience with a gauge that would drop to empty and trigger the check engine light. Multiple members confirmed the cause was a bad sending unit (fuel level sensor) requiring tank removal. One user quoted a dealer repair cost of over $1,000, highlighting the labor-intensive nature of the job.

Mechanic-Grade Diagnostic Values

• Fuel Level Sensor Resistance Sweep — expected: Smoothly sweeps from ~40 Ohms (empty) to ~250 Ohms (full).. Failure: A reading of OL (Open Loop/infinite resistance) at any point, or erratic jumps in value, confirms a failed sensor.
• Fuel Level Sensor Signal Voltage (Live Data on Scan Tool) — expected: Varies with fuel level, but should be well below 5 volts.. Failure: A voltage reading stuck at or near 5.0 volts indicates an open in the circuit, which is the direct trigger for P0463.
• Sensor Ground Circuit Voltage Drop (at pump connector, key on) — expected: Near 0.0 Volts (less than 100mV or 0.1V).. Failure: A reading significantly above 0.1V, especially a high reading like 5V, indicates an open or high resistance in the ground circuit, which can cause the signal voltage to read high.

Scan Tool Commands That Help

• GDS2 / Tech2: Instrument Panel Cluster > Output Control > Fuel Gauge Sweep — Use this bidirectional command to force the fuel gauge needle to sweep from empty to full. If the gauge moves correctly during this test, it proves the instrument cluster and its internal motor are working. This effectively rules out the gauge as the cause of the problem and isolates the fault to the sensor, wiring, or control module.

Wiring & Ground Locations

• PCM Connector X1, Pin 16 — The Powertrain Control Module (PCM) is located on the passenger side of the engine bay. The X1 connector is the black connector, closer to the front of the vehicle.. This is the specific pin for the primary Fuel Level Sensor Signal (Sensor 'A'). The wire is Dark Blue. Probing this wire is essential for end-to-end circuit testing between the PCM and the fuel tank.
• Fuel Pump Driver Control Module (FPCM) — Located inside the vehicle, behind the passenger side rear interior trim panel.. While not the most common cause for an isolated P0463, the FPCM controls the fuel pump and processes some fuel system data. Knowing its location is critical if related codes like P069E are present or if the module itself is suspected.
• Fuel Pump Assembly Connector — On top of the driver's side of the fuel tank.. This is the primary connection point for testing the sensor circuit. The signal wire is Dark Blue, and the sensor ground is a Brown/White wire.

OEM Part Supersession History

• 13577471, 13585453, 19208721 → 13592337 — Standard part consolidation and minor design updates by the manufacturer.
  Heads up: These part numbers are for the V6 fuel pump module. The new part (13592337) is the correct service replacement for all previous versions.
• 13577475, 13585454, 19208719 → 13592335 — Standard part consolidation and minor design updates by the manufacturer.
  Heads up: These part numbers are for the V8 (SS) fuel pump module. The new part (13592335) is the correct service replacement for all previous versions.

Model Year Variations Within This Range

• 2010-2011 vs 2012-2015: The 3.6L V6 engine was updated in 2012 from the LLT to the LFX. While the primary fuel pump module part number for the V6 spans the entire generation, other fuel system components like the high-pressure fuel pump are different and not interchangeable. Always verify your specific engine before ordering any fuel system parts.

Diagnostic Flowchart

Other Known Issues on This Vehicle

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

• Premature Timing Chain Wear (3.6L V6 LLT Engine) 🔴 High — Common on 2010-2011 models, typically between 50,000 and 100,000 miles. Often attributed to extended oil change intervals. (Ref: While other GM vehicles with this engine had a special coverage program, the Camaro was often excluded, leading to costly owner repairs.)
• Ignition Key Recall (Switchblade Key) 🔴 High — Affected all 2010-2014 models. The driver's knee could bump the large key fob, turning the engine off while driving. (Ref: NHTSA Recall 14V-346 (GM Recall #14294). The fix was to replace the integrated switchblade key with a separate key and fob.)
• Torque Converter Shudder (Automatic Transmission) 🟠 Medium — Common across many GM 6-speed and 8-speed automatic transmissions of this era. Feels like driving over rumble strips at light throttle. (Ref: Multiple TSBs exist for various GM models, generally recommending a specific fluid flush procedure with an updated transmission fluid.)
• Air Conditioning System Failures 🟠 Medium — Compressor failures and refrigerant leaks are commonly reported. A specific issue on 2011 models could cause the compressor to fail to engage or disengage. (Ref: A service campaign (#11122) was issued for 2011 models to reprogram the Body Control Module (BCM) to prevent compressor damage.)
• Key Stuck in Ignition 🟡 Low — Owners report the key getting stuck in the ignition and being unable to remove it after parking. This is often related to the shifter position sensor or the ignition lock solenoid.

Used vs. New Parts: Buying Guide for This Vehicle

When a used part is the smart pick: For this specific repair, using a used part is almost never a smart choice. The fuel level sensor itself is a wear item, and the fuel pump motor has a finite lifespan. The labor to drop the fuel tank is significant, and installing a used part carries a high risk of having to repeat the entire job soon after.

Donor-vehicle mileage cap: roughly under 40000 miles for the part to have meaningful remaining life.

What to inspect on the donor part:

• If forced to use a used part, source it from a vehicle with the lowest possible mileage.
• Ensure the plastic housing and connectors are not brittle or cracked.
• Verify the part number exactly matches the required OEM number for your vehicle's engine (V6 vs. V8).

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

• Fuel Pump Module Assembly

Aftermarket brands forum-validated for this vehicle:

• ACDelco (Original Equipment)
• GM Genuine Parts
• Delphi (often the OEM supplier)

Brands owners have reported issues with on this vehicle:

• Unbranded, 'white-box' parts from online marketplaces. The potential for premature failure is very high and not worth the risk given the labor-intensive installation.

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

• P0461 — Related fuel level sensor circuit code mentioned in GM TSB 17-NA-204 as part of the same pattern of component failure.
• P0462 — Related fuel level sensor circuit code (low input) often diagnosed alongside P0463 (high input) using the same multi-meter sweep tests.
• P0464 — Intermittent fuel level sensor circuit code that shares the same root causes, such as worn resistive contacts or damaged wiring harnesses.
• P2068 — Fuel level sensor 'B' circuit high; relevant to the Camaro's saddle-style tank system which utilizes primary and secondary sensing components.

Frequently Asked Questions