P2469 – DPF Temperature Sensor Circuit (Bank 2 Sensor 3)

System: Powertrain | Standard: ISO/SAE Controlled | Fault type: Circuit | Location: Bank 2, Sensor 3

Definition source: SAE J2012/J2012DA (industry standard)

DTC P2469 is a powertrain fault that indicates the engine control module has detected a problem in the electrical circuit for the diesel particulate filter (DPF) temperature sensor identified as Bank 2 Sensor 3. Because diagnostic strategies, sensor placement, and enabling conditions vary by vehicle, the same code may set under different operating conditions (such as during warm-up, regeneration, or steady cruising). Use the applicable service information to confirm the exact sensor location, connector pinout, and test specifications before replacing parts or repairing wiring.

What Does P2469 Mean?

P2469 means the control module has detected a malfunction in the DPF temperature sensor circuit for Bank 2 Sensor 3. The official description points to an electrical circuit issue (wiring, connector, sensor element, or control-module I/O) rather than confirming a specific exhaust temperature or DPF condition. SAE J2012 defines the standardized DTC structure, but the precise diagnostic thresholds, test conditions, and how Bank 2 Sensor 3 is labeled in data and diagrams can vary by vehicle, so confirmation with service information and circuit testing is required.

Quick Reference

• System: Powertrain
• Official meaning: DPF Temperature Sensor Circuit (Bank 2 Sensor 3)
• Standard: ISO/SAE controlled
• Fault type: Circuit
• Severity: MIL illumination is possible and the vehicle may limit certain operating modes (including emissions-related functions), potentially affecting drivability depending on how the system responds.

Symptoms

• MIL/Check engine: Warning light illuminated and P2469 stored as a current or pending code.
• Reduced power: Noticeable torque limiting or reduced-throttle response if the control module applies protective strategies.
• Regeneration inhibited: DPF regeneration may be delayed, aborted, or disabled if temperature feedback is unreliable.
• Cooling fan activity: Fans may run more often or longer than expected due to conservative thermal management.
• Fuel economy change: Increased consumption if the system alters injection strategy or regeneration behavior.
• Idle quality: Rough idle or altered idle speed may occur on some platforms during attempted regeneration or fallback operation.
• Other DTCs present: Additional exhaust temperature/aftertreatment or sensor-circuit codes may accompany P2469.

Common Causes

• Connector issues: Loose fit, corrosion, moisture intrusion, heat damage, or bent pins at the DPF temperature sensor (Bank 2 Sensor 3) or at the control module connector.
• Harness damage: Melted insulation, chafed wiring, pinched sections, or contact with hot exhaust components causing shorts or opens in the sensor circuit.
• Open circuit: Broken conductor inside the insulation or an unplugged/partially seated connector interrupting the signal, power, ground, or reference path (varies by vehicle design).
• Short to ground: Signal, power, or reference circuit rubbed through and contacting ground, pulling the circuit low or corrupting the signal.
• Short to power: Signal circuit contacting a power feed, forcing an invalid high signal or causing circuit interference.
• High resistance: Fretting corrosion, poor crimp, damaged terminal tension, or splices adding resistance that distorts the sensor reading under load.
• Sensor fault: Internal DPF temperature sensor element failure or internal short/open that drives an implausible or non-responsive electrical output.
• Control module or driver fault: A rare internal fault in the controller’s input circuit or reference supply affecting the sensor circuit’s ability to report correctly.

Diagnosis Steps

Tools: a scan tool capable of reading freeze-frame and live data, a digital multimeter, and basic back-probing or pin-testing accessories. A wiring diagram and connector pinout from service information are essential because circuit type (2-wire vs 3-wire), reference strategy, and expected behavior vary by vehicle. If available, use a breakout lead to reduce terminal damage risk while testing.

1. Confirm the code and context: Scan all modules and record DTCs, freeze-frame data, and readiness information. Note any other exhaust temperature, aftertreatment, or power supply codes that could affect the same circuit.
2. Check for repeatability: Clear codes and run the engine under conditions that typically set the fault (varies by vehicle). If P2469 resets immediately, suspect a hard electrical fault; if it returns later, consider intermittent wiring/connector issues.
3. Verify the correct sensor location: Using service information, identify “DPF Temperature Sensor (Bank 2 Sensor 3)” and its connector. Confirm you are testing the correct sensor and harness branch (bank/sensor numbering varies by vehicle).
4. Perform a focused visual inspection: Inspect the sensor body and harness routing near the exhaust for melted loom, abrasion, crushed sections, or recent service disturbance. Look closely for signs of water intrusion, corrosion, or overheating at the connector.
5. Live-data plausibility check: On the scan tool, monitor the DPF temperature parameter for the target sensor while observing related temperature sensors (if equipped). Look for a flatline, an erratic jump, or a reading that does not respond to engine heat-up compared to neighboring sensors (do not use fixed numeric thresholds; compare trends).
6. Wiggle test with logging: With the engine idling (or key on, as appropriate), gently move the harness and connector while logging live data and watching for sudden dropouts or spikes. If the value changes with movement, prioritize terminal tension, pin fit, and nearby harness damage.
7. Key-off connector checks: Turn ignition off and disconnect the sensor. Inspect terminals for spread pins, push-outs, or contamination. Correct any mechanical connector issues before electrical measurements.
8. Check circuit integrity (continuity): Using the wiring diagram, test the sensor signal circuit(s) between the sensor connector and the controller connector for opens and shorts to ground/power. Perform these checks with connectors disconnected as required by service procedures.
9. Check power/reference and ground quality: If the sensor uses a reference supply and ground (varies by vehicle), verify the reference is present and stable and that the ground path is intact. Use voltage-drop testing on the ground and any feed circuits under operating conditions to catch high-resistance faults that continuity checks can miss.
10. Sensor functional evaluation: If wiring, power/reference, and ground test good, evaluate the sensor itself per service information (method varies by sensor type). If results indicate an internal open/short or non-responsive behavior, replace the sensor.
11. Controller-side assessment: If all external circuits and the sensor test good but the fault persists, inspect controller connector pins for damage and verify circuit behavior at the controller pin. Only then consider a controller input fault, following service information procedures.
12. Verification: After repairs, clear DTCs and perform a drive cycle to confirm the code does not return and that live data from the DPF temperature sensor responds smoothly to changing operating conditions.

Professional tip: Don’t rely on a single continuity check to “prove” a good circuit. Many P2469 complaints are caused by high resistance at terminals or heat-damaged wiring that passes continuity at rest. Combine live-data logging with a wiggle test and voltage-drop testing under real operating conditions to expose intermittent opens and poor connections.

Possible Fixes & Repair Costs

Repair costs for P2469 can vary widely because the fault is circuit-related and may be caused by anything from a minor connector issue to sensor or module wiring repairs. Total cost depends on diagnostic time, access to the sensor, parts required, and labor rates.

• Repair wiring damage: Restore chafed, pinched, melted, or broken conductors in the DPF temperature sensor (Bank 2 Sensor 3) signal, power, ground, and reference circuits as applicable.
• Clean and secure connectors: Remove corrosion or contamination, correct poor terminal tension, and ensure connectors are fully seated and properly locked.
• Repair power/ground issues: Correct shared circuit faults such as weak grounds, damaged ground straps, or power feed problems that affect the sensor circuit.
• Replace the DPF temperature sensor: Replace only after testing confirms the sensor is the root cause rather than a wiring or connector fault.
• Harness/terminal replacement: Replace damaged pigtails, terminals, seals, or sections of harness if repairs cannot ensure a durable connection.
• Module-side circuit repair: If verified by testing, address control module connector, pin fit, or circuit faults (module replacement is a last step and may require setup).

Can I Still Drive With P2469?

You may be able to drive short distances with P2469, but treat it as a powertrain electrical fault that can change how the aftertreatment system is monitored and managed. If the vehicle enters reduced-power mode, has severe drivability issues, or any warning indicates loss of power/steering/braking assistance, do not continue driving; have it diagnosed promptly to prevent further issues.

What Happens If You Ignore P2469?

Ignoring P2469 can lead to persistent warning lights, intermittent or worsening drivability concerns, and incorrect temperature feedback for DPF-related control strategies. Over time, ongoing circuit faults may contribute to additional diagnostic codes, repeated fails of readiness/inspection checks, and potential aftertreatment performance issues because the system cannot reliably monitor the DPF temperature sensor circuit.

Last updated: February 17, 2026

Vehicles Commonly Affected by P2469

• Vehicles with a diesel particulate filter: Systems that use a DPF and monitor temperatures for aftertreatment control.
• Engines with multiple exhaust temperature sensors: Applications that designate sensors by bank and position (for example, “Bank 2 Sensor 3”).
• High-heat exhaust layouts: Configurations where wiring routes close to hot components, increasing risk of insulation damage.
• Vehicles used for short-trip operation: Operating patterns that increase aftertreatment activity and thermal cycling (vehicle behavior varies by design).
• High-mileage vehicles: Increased likelihood of connector wear, terminal tension loss, or harness fatigue over time.
• Vehicles exposed to corrosion: Environments where moisture, road spray, or contamination can affect connectors and grounds.
• Recently serviced exhaust/aftertreatment systems: Potential for disturbed connectors, pinched harnesses, or misrouted wiring after repairs.
• Modified or repaired wiring: Prior splices or nonstandard repairs that may introduce resistance, poor joints, or intermittent opens.

For P2469, the most reliable repairs come from confirming the DPF temperature sensor circuit fault with targeted electrical testing, then correcting the exact wiring, connector, grounding, or sensor issue found.