P2464 – DPF Temperature Sensor Circuit (Bank 1 Sensor 4)

System: Powertrain | Standard: ISO/SAE Controlled | Fault type: Circuit | Location: Bank 1, Sensor 4

Definition source: SAE J2012/J2012DA (industry standard)

DTC P2464 points to an electrical fault in the circuit for the DPF temperature sensor identified as Bank 1 Sensor 4. While the code’s title is standardized, how the control module detects, sets, and responds to this fault can vary by vehicle, including when the warning light turns on and which operating modes are affected. Treat P2464 as a circuit problem first, not a confirmed sensor or exhaust hardware failure. For accurate connector views, pin functions, and test specifications, verify the correct service information for the exact vehicle and engine configuration.

What Does P2464 Mean?

P2464 means the powertrain control system has detected a fault in the DPF Temperature Sensor Circuit (Bank 1 Sensor 4). In other words, the module is seeing an electrical circuit issue—such as an open, short, poor connection, or an out-of-expected electrical condition—in the wiring and connections associated with that specific DPF temperature sensor signal path. SAE J2012 defines the overall DTC naming structure, but the exact enable conditions, monitoring strategy, and response (such as derate or regeneration changes) can vary by vehicle and should be confirmed with service information.

Quick Reference

• System: Powertrain
• Official meaning: DPF Temperature Sensor Circuit (Bank 1 Sensor 4)
• Standard: ISO/SAE controlled
• Fault type: Circuit
• Severity: MIL illumination is possible, and engine aftertreatment operation may be altered, which can lead to reduced performance or restricted regeneration depending on strategy.

Symptoms

• MIL/Warning light: Check Engine Light may illuminate, sometimes after multiple drive cycles depending on monitor logic.
• Reduced power: Power or torque limitation may occur if the control system enters a protective mode.
• Regeneration changes: DPF regeneration may be inhibited, delayed, or commanded differently because temperature feedback is unreliable.
• Fan/idle behavior: Cooling fan operation or elevated idle strategies may change if temperature-related calculations are affected.
• Driveability: Hesitation, abnormal throttle response, or inconsistent performance may be noticed, especially under load.
• Fuel economy: Consumption may increase if the system compensates for missing/incorrect temperature input.
• Additional DTCs: Related exhaust temperature, aftertreatment, or sensor-circuit codes may set alongside P2464.

Common Causes

• Connector issues: Loose fit, damaged lock, corrosion, moisture intrusion, or terminal fretting at the DPF temperature sensor (Bank 1 Sensor 4) connector.
• Harness damage: Chafed, melted, pinched, or abraded wiring near hot exhaust components or sharp brackets causing shorts or opens.
• Open circuit: Broken conductor inside insulation, partially backed-out terminal, or an unplugged connector in the sensor circuit.
• Short to ground: Signal or supply/reference circuit contacting chassis/engine ground due to insulation damage.
• Short to power: Signal circuit contacting a power feed (or cross-short to another powered circuit) creating an implausible electrical condition.
• Poor power/ground to the sensor: High resistance in the sensor feed or ground path (including shared grounds) causing unstable or incorrect circuit behavior.
• Sensor internal electrical fault: DPF temperature sensor element or internal circuitry failing electrically (confirmed only after circuit checks).
• Control module/driver or input fault: Rarely, the engine control module input circuit or related module fault affecting sensor circuit interpretation.

Diagnosis Steps

Tools typically needed include a scan tool capable of reading DTCs, freeze-frame data, and live data (with data logging), a digital multimeter, and basic backprobing supplies. A wiring diagram and connector pinout from service information are essential because circuit design varies by vehicle. If access permits, use inspection lighting and heat protection for working near exhaust components.

1. Confirm the code and capture data: Verify P2464 is present. Record freeze-frame, environmental data, and any companion DTCs. Address power supply, module communication, or reference-supply DTCs first if they are present, because they can skew sensor-circuit diagnostics.
2. Clear and recheck: Clear DTCs and run the engine under conditions that typically set the code (varies by vehicle). If P2464 returns immediately, treat it as a hard fault; if it takes time, treat it as intermittent and plan for a wiggle test and extended logging.
3. Identify the correct sensor: Using service information, locate “DPF Temperature Sensor (Bank 1 Sensor 4)” and confirm the connector, routing, and any intermediate connectors. Do not rely on physical position assumptions; sensor numbering and placement vary by vehicle.
4. Visual inspection (exhaust-heat focus): Inspect the sensor body, pigtail, and harness routing near the exhaust/DPF area. Look for melted insulation, contact with hot surfaces, missing retainers, rubbed-through sections, and prior repairs. Repair obvious harness damage before deeper electrical testing.
5. Connector and terminal checks: With ignition off, disconnect the sensor connector. Inspect for corrosion, spread terminals, bent pins, pushed-back terminals, and poor pin fit. Correct any terminal issues found (cleaning, terminal repair, connector replacement as appropriate) and ensure the connector fully seats and locks.
6. Reference/supply and ground integrity: With the connector still accessible, use the wiring diagram to identify power/reference and ground circuits (varies by vehicle). Check for presence of the proper feed and a solid ground path. If a ground is suspected, perform a voltage-drop test on the ground side under load rather than relying on continuity alone.
7. Signal circuit checks for shorts/opens: Key off, disconnect the sensor and (as directed by service info) the control module connector if needed to avoid module damage. Check the signal circuit for continuity end-to-end and for shorts to ground and shorts to power. If readings change when moving the harness, suspect an intermittent conductor or terminal issue.
8. Wiggle test with live logging: Reconnect components and monitor the DPF temperature sensor PID(s) and any related temperature PIDs while gently moving the harness and connector at multiple points (sensor pigtail, along the frame/engine, near brackets). Log data to capture dropouts, spikes, or flatlines that correlate with harness movement.
9. Correlation/plausibility sanity check (supporting, not decisive): Compare the suspect sensor’s live reading behavior to other exhaust temperature sensors during steady operating conditions. You are not proving a temperature problem—only looking for electrical symptoms like implausible jumps, intermittency, or a reading that does not respond at all when others do.
10. Substitute/component isolation per service procedures: If wiring and connectors test good and the fault persists, follow service information for sensor testing or controlled substitution. Confirm the circuit behaves normally with a known-good component (where approved) before condemning the sensor or control module.
11. Final verification: After repairs, clear DTCs, perform the required drive cycle or enable criteria (varies by vehicle), and confirm P2464 does not reset. Recheck readiness/monitors as applicable and ensure the harness is secured away from heat and abrasion points.

Professional tip: Prioritize voltage-drop testing and harness movement checks near the exhaust/DPF area. Many “good on a meter” circuits fail only under vibration, heat, or load—data logging during a wiggle test is often what turns an intermittent P2464 from a guess into a verified wiring or terminal fault.

Possible Fixes & Repair Costs

Repair cost for P2464 varies widely because it depends on what testing confirms (sensor vs wiring vs module issue), connector condition, harness access, and labor time. Always diagnose the circuit fault first so parts replacement is targeted and effective.

• Repair wiring damage: Restore any chafed, melted, pinched, or broken wiring in the DPF temperature sensor circuit; re-route and re-protect the harness as needed.
• Connector service: Clean corrosion, dry moisture intrusion, correct terminal push-out, and restore poor pin fit at the sensor and control module connectors; replace terminals/connectors if required.
• Power and ground restoration: Repair open feeds, poor grounds, or high-resistance connections found during voltage-drop testing; ensure the circuit can carry load without excessive drop.
• Sensor replacement: Replace Bank 1 Sensor 4 DPF temperature sensor only after confirming it fails circuit tests (not just because the code is stored).
• Harness section replacement: Replace a damaged section of the engine/underbody harness when spot repairs can’t reliably restore conductor integrity.
• Module-side repair: If service information supports it and testing proves the module circuit is at fault, perform the approved repair path (may include module replacement and required setup).

Can I Still Drive With P2464?

You may be able to drive short distances if the vehicle operates normally, but treat P2464 as an active circuit fault that can affect exhaust temperature monitoring and related strategies. If you have reduced power, harsh running, warning messages, stalling, a strong exhaust odor, or any safety-related alerts, do not continue driving; have the circuit diagnosed promptly and follow service information for any operating limits.

What Happens If You Ignore P2464?

Ignoring P2464 can lead to an ongoing MIL, failed emissions inspection readiness, and reduced confidence in exhaust temperature feedback used by the powertrain system. Over time, the vehicle may limit performance or alter exhaust aftertreatment operation because the temperature sensor circuit input is unreliable, and the underlying wiring/connector issue can worsen into intermittent faults.

Last updated: February 17, 2026

Vehicles Commonly Affected by P2464

• Diesel-equipped vehicles: Platforms using a DPF and multiple exhaust temperature sensors.
• Vehicles with underbody aftertreatment: Long harness runs to exhaust sensors that are exposed to heat and road debris.
• High-mileage vehicles: Increased likelihood of brittle wiring, terminal fretting, and connector seal degradation.
• Vehicles used for towing or heavy load: Higher exhaust heat cycles that can stress wiring and connectors near the exhaust.
• Stop-and-go duty cycles: Frequent thermal cycling can accelerate connector and harness issues around the DPF area.
• Vehicles operated in wet/salty environments: Greater chance of corrosion in connectors and grounds.
• Vehicles with prior exhaust work: Sensor connectors or harness routing may be disturbed during service, leading to poor connections.
• Fleet/commercial duty vehicles: Higher vibration and longer run times can expose intermittent circuit faults sooner.

After repairs, clear the DTC, perform a road test under varied conditions, and confirm P2464 does not reset while monitoring related live data to verify the DPF temperature sensor circuit is stable.