P2472 – DPF Temperature Sensor Circuit (Bank 2 Sensor 4)

System: Powertrain | Standard: ISO/SAE Controlled | Fault type: Circuit | Location: Bank 2, Sensor 4

Definition source: SAE J2012/J2012DA (industry standard)

P2472 indicates the powertrain control system has detected a fault in the DPF temperature sensor circuit identified as Bank 2 Sensor 4. This is a circuit-related DTC, meaning the module is flagging an electrical or signal-path issue (such as wiring, connector, power/ground, or the sensor circuit itself) rather than confirming a physical exhaust or filter condition by itself. How the code is monitored, what conditions set it, and what data values are expected can vary by vehicle, so confirm sensor location, pinout, and test specifications using the correct service information before replacing parts.

What Does P2472 Mean?

P2472 – DPF Temperature Sensor Circuit (Bank 2 Sensor 4) means the control module detected an electrical fault within the circuit for the Diesel Particulate Filter (DPF) temperature sensor designated Bank 2 Sensor 4. Under the SAE J2012 DTC structure, the code identifies the affected system and the specific diagnostic entry, while the wording “circuit” focuses diagnosis on the electrical path (sensor, wiring harness, connectors, terminals, power feed, ground, and module input) and the signal integrity between the sensor and the controller. Exact sensor placement and circuit design vary by vehicle.

Quick Reference

• System: Powertrain
• Official meaning: DPF Temperature Sensor Circuit (Bank 2 Sensor 4)
• Standard: ISO/SAE controlled
• Fault type: Circuit
• Severity: The MIL may illuminate and the vehicle may limit certain emissions-related functions; drivability impact is possible depending on how the control module uses this temperature input.

Symptoms

• MIL on: Check engine light illuminated, sometimes after one or more drive cycles.
• Reduced power: Limited torque or reduced performance if the system enters a protective strategy tied to exhaust temperature monitoring.
• Regeneration concerns: Regeneration may be inhibited, delayed, or managed differently if the controller cannot trust the DPF temperature signal.
• Rough running: Idle quality or acceleration feel may change if fueling or aftertreatment strategies are adjusted.
• Increased fuel use: Fuel economy may drop if compensating strategies are applied.
• Harsh fan operation: Cooling fan behavior may seem more aggressive if the system assumes higher exhaust/underbody heat risk.
• Stored related codes: Additional exhaust temperature or aftertreatment circuit codes may appear, depending on how sensors are grouped and monitored.

Common Causes

• Connector issues: Loose fit, corrosion, moisture intrusion, terminal spread, or damaged locking tabs at the DPF temperature sensor (Bank 2 Sensor 4) connector.
• Harness damage: Chafed, melted, pinched, or heat-brittle wiring near the exhaust/DPF area causing opens or unintended contact.
• Open circuit: Broken conductor inside insulation, partially broken wire at a bend point, or an unplugged connector in the sensor circuit.
• Short to power/short to ground: Wire-to-wire contact or contact with a power/ground source due to insulation damage (routing/heat/abrasion related).
• Poor ground or power feed: High resistance at a ground point, degraded splice, or weak supply feed that distorts the sensor circuit signal.
• High resistance: Corroded terminals, poor crimp, or compromised splice creating voltage drop and unstable sensor readings.
• Sensor fault: Internal failure of the DPF temperature sensor element or internal connector pins leading to an abnormal circuit signal.
• Control module / circuit driver issue: A fault in the control module input, internal reference, or signal conditioning (less common; verify external circuit first).

Diagnosis Steps

Useful tools include a scan tool capable of reading live data and freeze-frame, a digital multimeter, and back-probing leads. Having the correct wiring diagram and connector views for your vehicle is essential because pinouts and reference/ground strategy vary by vehicle. If available, use a breakout lead or test harness to reduce terminal damage during testing.

1. Confirm the code and document data: Scan for P2472 and any companion codes. Save freeze-frame information and note when the fault sets (key-on, idle, under load, during regeneration, etc.). Clear codes and see if P2472 returns immediately or after a drive cycle.
2. Verify the correct sensor location: Using service information, identify Bank 2 Sensor 4 and its harness routing. Do not assume physical placement; confirm connector ID and pinout by diagram because sensor numbering varies by vehicle.
3. Quick visual inspection (exhaust area): With the key off, inspect the sensor body, connector, and harness near the DPF/exhaust for heat damage, melted insulation, abrasion, missing clips, or contact with sharp edges. Repair obvious routing or insulation problems before deeper testing.
4. Connector and terminal check: Disconnect the sensor connector and inspect for corrosion, moisture, bent pins, pushed-out terminals, and poor pin tension. Gently tug-test each wire at the rear of the connector for internal breaks. Correct any terminal issues and ensure the connector locks positively.
5. Wiggle test with live data: Reconnect the sensor. Monitor the DPF temperature sensor signal (and related exhaust temperature PIDs if available) on the scan tool. Wiggle the harness and connector while watching for abrupt dropouts, spikes, or implausible jumps that indicate an intermittent circuit or poor connection.
6. Check for related circuit integrity (reference, signal, ground): With the key on (engine off) and using the wiring diagram, test for the presence of the expected supply/reference and ground at the sensor connector. If either is missing or unstable, isolate whether the issue is in the feed/ground path, a splice, or the control module side.
7. Continuity and short checks (power off): Key off and disconnect the control module connector(s) as specified by service information. Perform continuity checks from the sensor connector to the control module pins for each circuit. Then check each circuit for short-to-ground and short-to-power conditions. Repair opens/high resistance or shorts as found.
8. Voltage-drop testing under load: If the circuit uses a power/ground feed strategy, perform voltage-drop testing across suspect connectors, splices, and ground points while the circuit is active (per service information). Excessive drop indicates resistance that can distort the sensor circuit signal even when continuity appears acceptable.
9. Compare sensor behavior to related data: Use live-data logging during a controlled warm-up/drive (as safe and permitted). Compare Bank 2 Sensor 4 behavior to other exhaust/DPF temperature sensors on the same vehicle if available. Look for a signal that is fixed, erratic, or nonresponsive compared to the others, which supports a circuit/sensor issue rather than a single operating condition.
10. Substitute known-good only after circuit verification: If power/ground/reference and wiring integrity test good and the signal remains abnormal, replace the DPF temperature sensor (Bank 2 Sensor 4) per service procedure. After replacement, clear codes and repeat the drive cycle to confirm the repair.
11. Control module suspicion (last): If the fault persists with verified-good wiring and a verified-good sensor, follow service information for module-side pin checks, terminal fit, and input evaluation. Replace/program a module only after all external causes are eliminated.

Professional tip: If P2472 appears intermittently, prioritize capturing a live-data log that includes sensor PIDs, engine load, and time stamps while performing a harness wiggle and during the operating condition that usually triggers the code. Intermittent circuit faults often won’t fail a static continuity check but will reveal themselves as brief dropouts or spikes tied to vibration, heat soak, or connector movement.

Possible Fixes & Repair Costs

Repair costs for P2472 can vary widely because the root cause may be in wiring, connectors, the sensor itself, or controller-side circuitry. Total expense depends on the time required to pinpoint the circuit fault, parts availability, and labor access around the exhaust/DPF area.

• Repair wiring damage: Restore chafed, melted, pinched, or corroded conductors in the DPF temperature sensor circuit (Bank 2 Sensor 4), then protect and reroute as needed.
• Service connectors: Clean corrosion, remove moisture contamination, correct poor terminal tension/pin fit, and ensure positive locking at the sensor and harness junctions.
• Correct power/ground issues: Repair open or high-resistance power feeds and grounds; address excessive voltage drop that affects sensor circuit operation.
• Replace the DPF temperature sensor: Replace only after confirming the circuit and connector integrity and verifying the sensor is the fault source.
• Repair harness shorts: Locate and correct shorts to power or to ground (varies by circuit design) that distort the temperature signal and trigger the circuit fault.
• Verify controller connection integrity: Repair controller-side connector issues (backed-out pins, corrosion, spread terminals) if the fault is traced to the controller interface.
• Update/restore related wiring retainers and heat shielding: Replace missing clips, conduit, or heat protection that allowed heat-related harness damage near the exhaust.

Can I Still Drive With P2472?

You may be able to drive short distances if the vehicle operates normally, but P2472 indicates a DPF temperature sensor circuit fault that can cause the system to use a fallback strategy and potentially affect aftertreatment operation. If you notice reduced power, warning lights that escalate, abnormal exhaust odor/heat, or any stalling/no-start behavior, avoid driving and have the circuit diagnosed promptly. If any brake or steering warnings appear, do not drive.

What Happens If You Ignore P2472?

Ignoring P2472 can lead to persistent warning lights and improper exhaust aftertreatment control because temperature feedback may be unreliable. Over time this may contribute to poor regeneration control, potential drivability impacts such as reduced power, and increased stress on exhaust/aftertreatment components. Continued operation with an unresolved circuit fault can also complicate future diagnostics by adding additional codes.

Last updated: February 17, 2026

Vehicles Commonly Affected by P2472

• Diesel-equipped vehicles: Platforms using a DPF and exhaust temperature sensors for aftertreatment monitoring.
• High-mileage vehicles: Increased likelihood of harness brittleness, terminal fretting, and connector corrosion.
• Vehicles used for towing/haul duty: More heat cycling near the exhaust can accelerate insulation damage.
• Stop-and-go operation: Frequent thermal transitions can stress wiring and connectors near the DPF.
• Vehicles operated in wet/salty environments: Higher risk of connector corrosion and water intrusion in harness joints.
• Vehicles with prior exhaust repairs: Harness misrouting, missing heat shields, or disturbed connectors after service.
• Off-road or rough-road use: Vibration can worsen pin fit issues and intermittent circuit faults.
• Vehicles with modified underbody shielding: Altered heat management may raise harness temperatures and degrade insulation.

For an accurate repair, confirm the correct sensor and connector for Bank 2 Sensor 4 using the vehicle’s service information, then verify wiring integrity and signal stability before replacing components.