P2453 — Particulate Filter Pressure Sensor A Circuit Range/Performance

Causes

• Faulty particulate filter pressure sensor (sensor A)
• Blocked, kinked, cracked or disconnected pressure hose/lines to the sensor
• Corroded, loose or damaged sensor connector or wiring (open, short to ground or short to battery)
• Excessive DPF restriction or soot load producing pressures beyond sensor range
• Contaminated sensor (oil, soot) or clogged sensor port
• Intermittent/failed ECM input or poor ground at ECM

Symptoms

• Check Engine / MIL illuminated
• Stored P2453 (and possibly related exhaust/DPF codes)
• Failed regen or frequent/failed regeneration attempts
• Reduced engine performance or derate on some vehicles
• Increased fuel consumption or prolonged regen events
• Visible black smoke or excessive soot under heavy loading (if DPF is blocked)

What to check

• Read and record freeze frame data and all stored codes with a scan tool (include pending codes)
• Visually inspect sensor, connector and pressure hoses for damage, disconnection, crimps or blockages
• Check for contamination or soot in sensor pressure port(s) and DPF pressure taps
• Backprobe sensor: verify reference supply (usually 5 V) and good ground at key ON
• Measure sensor signal voltage with engine off and during varied engine load; expect the signal to change with pressure
• Perform continuity and resistance checks on wiring between sensor and ECM; check for short to battery or ground

Signal parameters

• Vehicle-specific—consult OEM service data for exact values
• Typical electrical: sensor powered from a reference (often 5 V) with a ground and a signal output (analog)
• Typical output range (example only): ~0.5–4.5 V across sensor operating range (0–sometime 500–1000 mbar depending on sensor)
• Expected behavior: signal should change smoothly with applied pressure; at key-ON engine-OFF a stable reference voltage and a reasonable signal (not open/short) should be present

Similar codes

Causes

• Faulty particulate filter pressure sensor (sensor A)
• Blocked, kinked, cracked or disconnected pressure hose/lines to the sensor
• Corroded, loose or damaged sensor connector or wiring (open, short to ground or short to battery)
• Excessive DPF restriction or soot load producing pressures beyond sensor range
• Contaminated sensor (oil, soot) or clogged sensor port
• Intermittent/failed ECM input or poor ground at ECM

Symptoms

• Check Engine / MIL illuminated
• Stored P2453 (and possibly related exhaust/DPF codes)
• Failed regen or frequent/failed regeneration attempts
• Reduced engine performance or derate on some vehicles
• Increased fuel consumption or prolonged regen events
• Visible black smoke or excessive soot under heavy loading (if DPF is blocked)

What to check

• Read and record freeze frame data and all stored codes with a scan tool (include pending codes)
• Visually inspect sensor, connector and pressure hoses for damage, disconnection, crimps or blockages
• Check for contamination or soot in sensor pressure port(s) and DPF pressure taps
• Backprobe sensor: verify reference supply (usually 5 V) and good ground at key ON
• Measure sensor signal voltage with engine off and during varied engine load; expect the signal to change with pressure
• Perform continuity and resistance checks on wiring between sensor and ECM; check for short to battery or ground

Signal parameters

• Vehicle-specific—consult OEM service data for exact values
• Typical electrical: sensor powered from a reference (often 5 V) with a ground and a signal output (analog)
• Typical output range (example only): ~0.5–4.5 V across sensor operating range (0–sometime 500–1000 mbar depending on sensor)
• Expected behavior: signal should change smoothly with applied pressure; at key-ON engine-OFF a stable reference voltage and a reasonable signal (not open/short) should be present

Similar codes

Causes

• Faulty particulate filter pressure sensor (sensor A)
• Blocked, kinked, cracked or disconnected pressure hose/lines to the sensor
• Corroded, loose or damaged sensor connector or wiring (open, short to ground or short to battery)
• Excessive DPF restriction or soot load producing pressures beyond sensor range
• Contaminated sensor (oil, soot) or clogged sensor port
• Intermittent/failed ECM input or poor ground at ECM

Symptoms

• Check Engine / MIL illuminated
• Stored P2453 (and possibly related exhaust/DPF codes)
• Failed regen or frequent/failed regeneration attempts
• Reduced engine performance or derate on some vehicles
• Increased fuel consumption or prolonged regen events
• Visible black smoke or excessive soot under heavy loading (if DPF is blocked)

What to check

• Read and record freeze frame data and all stored codes with a scan tool (include pending codes)
• Visually inspect sensor, connector and pressure hoses for damage, disconnection, crimps or blockages
• Check for contamination or soot in sensor pressure port(s) and DPF pressure taps
• Backprobe sensor: verify reference supply (usually 5 V) and good ground at key ON
• Measure sensor signal voltage with engine off and during varied engine load; expect the signal to change with pressure
• Perform continuity and resistance checks on wiring between sensor and ECM; check for short to battery or ground

Signal parameters

• Vehicle-specific—consult OEM service data for exact values
• Typical electrical: sensor powered from a reference (often 5 V) with a ground and a signal output (analog)
• Typical output range (example only): ~0.5–4.5 V across sensor operating range (0–sometime 500–1000 mbar depending on sensor)
• Expected behavior: signal should change smoothly with applied pressure; at key-ON engine-OFF a stable reference voltage and a reasonable signal (not open/short) should be present

Similar codes