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Home / DTC / P0552 — Power Steering Pressure Sensor/Switch Circuit Low

P0552 — Power Steering Pressure Sensor/Switch Circuit Low

Detailed page for trouble code P0552.

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11,914generic
22,491specific
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Code

P0552

Generic P — Powertrain

Power Steering Pressure Sensor/Switch Circuit Low

Brand: Generic
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Short to ground on the pressure sensor signal wire
  • Open or high-resistance wiring or poor connector connection
  • Failed power steering pressure sensor or switch
  • Lost 5V reference or sensor ground
  • Corroded/wet connector or terminal
  • Faulty PCM/ECM input (less common)

Symptoms

  • MIL (check engine light) illuminated
  • Stored DTC P0552 and possible related codes
  • Low/incorrect pressure reading reported in live data (signal near 0V)
  • Possible increased steering effort or degraded steering assist on some vehicles (depends on system)
  • Intermittent faults when harness is moved or wet

What to check

  • Read and record DTC(s) and freeze-frame data with a scan tool
  • View live data stream for power steering pressure signal while key ON and during engine idle/run
  • Visually inspect sensor connector and wiring for corrosion, pin damage, or fluid contamination
  • Backprobe sensor connector: check for 5V reference, sensor ground, and signal voltage
  • Perform continuity and short-to-ground check between signal pin and PCM pin with ignition OFF
  • Wiggle harness and connector while observing live data for intermittent behavior

Signal parameters

  • Typical reference voltage: +5.0 V (vehicle-specific)
  • Sensor signal (no/low pressure): often close to 0–0.5 V when fault set (varies by design)
  • Normal operating signal range: about 0.5–4.5 V depending on pressure (manufacturer-specific)
  • Fault threshold: PCM reports ‘circuit low’ when signal is near ground or below manufacturer threshold (commonly

Diagnostic algorithm

  1. Connect scan tool, record freeze frame and related codes; note conditions when fault occurred.
  2. Inspect sensor, connector, and harness for damage, contamination, or fluid intrusion. Repair visible issues.
  3. With key ON (engine OFF), backprobe connector: verify 5V reference present, good sensor ground, and measure signal voltage. Compare to expected ranges.
  4. With engine running (and steering input applied if needed), monitor signal for change. If signal remains near ground, proceed.
  5. Turn ignition OFF and measure continuity/resistance between sensor signal pin and PCM input pin; check for short to ground and shorts to power.
  6. If wiring is good and reference/ground correct but signal low, replace the pressure sensor/switch. Use OEM or equivalent replacement.
  7. After repair, clear codes, perform functional test and a road test; confirm code does not return.
  8. If issue persists after sensor and wiring verified/replaced, inspect PCM input circuitry or consult manufacturer for module testing.
  9. Safety note: avoid working on rotating or pressurized components while engine running; follow vehicle-specific procedures for steering system service.

Likely causes

  • Corroded or loose connector at the pressure sensor
  • Short to ground in the signal wire between sensor and PCM
  • Failed/shorted pressure sensor/switch
  • Open or missing 5V reference or ground to the sensor
  • Internal PCM input failure (verify after wiring/sensor checks)

Fault status

⚠️ Status
Power Steering Pressure Sensor/Switch Circuit Low — ECM detects the pressure sensor signal voltage is below the expected range (circuit reading near ground).
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0551 P0553 P0522 P0521
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Code

P0552

GWM P — Powertrain

- Low indicator of the pressure sensor in the power steering

Brand: GWM
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Short to ground on the pressure sensor signal wire
  • Open or high-resistance wiring or poor connector connection
  • Failed power steering pressure sensor or switch
  • Lost 5V reference or sensor ground
  • Corroded/wet connector or terminal
  • Faulty PCM/ECM input (less common)

Symptoms

  • MIL (check engine light) illuminated
  • Stored DTC P0552 and possible related codes
  • Low/incorrect pressure reading reported in live data (signal near 0V)
  • Possible increased steering effort or degraded steering assist on some vehicles (depends on system)
  • Intermittent faults when harness is moved or wet

What to check

  • Read and record DTC(s) and freeze-frame data with a scan tool
  • View live data stream for power steering pressure signal while key ON and during engine idle/run
  • Visually inspect sensor connector and wiring for corrosion, pin damage, or fluid contamination
  • Backprobe sensor connector: check for 5V reference, sensor ground, and signal voltage
  • Perform continuity and short-to-ground check between signal pin and PCM pin with ignition OFF
  • Wiggle harness and connector while observing live data for intermittent behavior

Signal parameters

  • Typical reference voltage: +5.0 V (vehicle-specific)
  • Sensor signal (no/low pressure): often close to 0–0.5 V when fault set (varies by design)
  • Normal operating signal range: about 0.5–4.5 V depending on pressure (manufacturer-specific)
  • Fault threshold: PCM reports ‘circuit low’ when signal is near ground or below manufacturer threshold (commonly

Diagnostic algorithm

  1. Connect scan tool, record freeze frame and related codes; note conditions when fault occurred.
  2. Inspect sensor, connector, and harness for damage, contamination, or fluid intrusion. Repair visible issues.
  3. With key ON (engine OFF), backprobe connector: verify 5V reference present, good sensor ground, and measure signal voltage. Compare to expected ranges.
  4. With engine running (and steering input applied if needed), monitor signal for change. If signal remains near ground, proceed.
  5. Turn ignition OFF and measure continuity/resistance between sensor signal pin and PCM input pin; check for short to ground and shorts to power.
  6. If wiring is good and reference/ground correct but signal low, replace the pressure sensor/switch. Use OEM or equivalent replacement.
  7. After repair, clear codes, perform functional test and a road test; confirm code does not return.
  8. If issue persists after sensor and wiring verified/replaced, inspect PCM input circuitry or consult manufacturer for module testing.
  9. Safety note: avoid working on rotating or pressurized components while engine running; follow vehicle-specific procedures for steering system service.

Likely causes

  • Corroded or loose connector at the pressure sensor
  • Short to ground in the signal wire between sensor and PCM
  • Failed/shorted pressure sensor/switch
  • Open or missing 5V reference or ground to the sensor
  • Internal PCM input failure (verify after wiring/sensor checks)

Fault status

⚠️ Status
Power Steering Pressure Sensor/Switch Circuit Low — ECM detects the pressure sensor signal voltage is below the expected range (circuit reading near ground).
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0551 P0553 P0522 P0521
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+100 karma for a short comment :)
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Code

P0552

HUMMER P — Powertrain

Power Steering Pressure Sensor Circuit Low Input

Brand: HUMMER
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Short to ground on the pressure sensor signal wire
  • Open or high-resistance wiring or poor connector connection
  • Failed power steering pressure sensor or switch
  • Lost 5V reference or sensor ground
  • Corroded/wet connector or terminal
  • Faulty PCM/ECM input (less common)

Symptoms

  • MIL (check engine light) illuminated
  • Stored DTC P0552 and possible related codes
  • Low/incorrect pressure reading reported in live data (signal near 0V)
  • Possible increased steering effort or degraded steering assist on some vehicles (depends on system)
  • Intermittent faults when harness is moved or wet

What to check

  • Read and record DTC(s) and freeze-frame data with a scan tool
  • View live data stream for power steering pressure signal while key ON and during engine idle/run
  • Visually inspect sensor connector and wiring for corrosion, pin damage, or fluid contamination
  • Backprobe sensor connector: check for 5V reference, sensor ground, and signal voltage
  • Perform continuity and short-to-ground check between signal pin and PCM pin with ignition OFF
  • Wiggle harness and connector while observing live data for intermittent behavior

Signal parameters

  • Typical reference voltage: +5.0 V (vehicle-specific)
  • Sensor signal (no/low pressure): often close to 0–0.5 V when fault set (varies by design)
  • Normal operating signal range: about 0.5–4.5 V depending on pressure (manufacturer-specific)
  • Fault threshold: PCM reports ‘circuit low’ when signal is near ground or below manufacturer threshold (commonly

Diagnostic algorithm

  1. Connect scan tool, record freeze frame and related codes; note conditions when fault occurred.
  2. Inspect sensor, connector, and harness for damage, contamination, or fluid intrusion. Repair visible issues.
  3. With key ON (engine OFF), backprobe connector: verify 5V reference present, good sensor ground, and measure signal voltage. Compare to expected ranges.
  4. With engine running (and steering input applied if needed), monitor signal for change. If signal remains near ground, proceed.
  5. Turn ignition OFF and measure continuity/resistance between sensor signal pin and PCM input pin; check for short to ground and shorts to power.
  6. If wiring is good and reference/ground correct but signal low, replace the pressure sensor/switch. Use OEM or equivalent replacement.
  7. After repair, clear codes, perform functional test and a road test; confirm code does not return.
  8. If issue persists after sensor and wiring verified/replaced, inspect PCM input circuitry or consult manufacturer for module testing.
  9. Safety note: avoid working on rotating or pressurized components while engine running; follow vehicle-specific procedures for steering system service.

Likely causes

  • Corroded or loose connector at the pressure sensor
  • Short to ground in the signal wire between sensor and PCM
  • Failed/shorted pressure sensor/switch
  • Open or missing 5V reference or ground to the sensor
  • Internal PCM input failure (verify after wiring/sensor checks)

Fault status

⚠️ Status
Power Steering Pressure Sensor/Switch Circuit Low — ECM detects the pressure sensor signal voltage is below the expected range (circuit reading near ground).
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0551 P0553 P0522 P0521
Repair manuals

Manual library for HUMMER

138

Browse 138 HUMMER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

HUMMER

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Code

P0552

MERCEDES-BENZ P — Powertrain

Power Steering Pressure Sensor Circuit Low Input

Brand: MERCEDES-BENZ
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Short to ground on the pressure sensor signal wire
  • Open or high-resistance wiring or poor connector connection
  • Failed power steering pressure sensor or switch
  • Lost 5V reference or sensor ground
  • Corroded/wet connector or terminal
  • Faulty PCM/ECM input (less common)

Symptoms

  • MIL (check engine light) illuminated
  • Stored DTC P0552 and possible related codes
  • Low/incorrect pressure reading reported in live data (signal near 0V)
  • Possible increased steering effort or degraded steering assist on some vehicles (depends on system)
  • Intermittent faults when harness is moved or wet

What to check

  • Read and record DTC(s) and freeze-frame data with a scan tool
  • View live data stream for power steering pressure signal while key ON and during engine idle/run
  • Visually inspect sensor connector and wiring for corrosion, pin damage, or fluid contamination
  • Backprobe sensor connector: check for 5V reference, sensor ground, and signal voltage
  • Perform continuity and short-to-ground check between signal pin and PCM pin with ignition OFF
  • Wiggle harness and connector while observing live data for intermittent behavior

Signal parameters

  • Typical reference voltage: +5.0 V (vehicle-specific)
  • Sensor signal (no/low pressure): often close to 0–0.5 V when fault set (varies by design)
  • Normal operating signal range: about 0.5–4.5 V depending on pressure (manufacturer-specific)
  • Fault threshold: PCM reports ‘circuit low’ when signal is near ground or below manufacturer threshold (commonly

Diagnostic algorithm

  1. Connect scan tool, record freeze frame and related codes; note conditions when fault occurred.
  2. Inspect sensor, connector, and harness for damage, contamination, or fluid intrusion. Repair visible issues.
  3. With key ON (engine OFF), backprobe connector: verify 5V reference present, good sensor ground, and measure signal voltage. Compare to expected ranges.
  4. With engine running (and steering input applied if needed), monitor signal for change. If signal remains near ground, proceed.
  5. Turn ignition OFF and measure continuity/resistance between sensor signal pin and PCM input pin; check for short to ground and shorts to power.
  6. If wiring is good and reference/ground correct but signal low, replace the pressure sensor/switch. Use OEM or equivalent replacement.
  7. After repair, clear codes, perform functional test and a road test; confirm code does not return.
  8. If issue persists after sensor and wiring verified/replaced, inspect PCM input circuitry or consult manufacturer for module testing.
  9. Safety note: avoid working on rotating or pressurized components while engine running; follow vehicle-specific procedures for steering system service.

Likely causes

  • Corroded or loose connector at the pressure sensor
  • Short to ground in the signal wire between sensor and PCM
  • Failed/shorted pressure sensor/switch
  • Open or missing 5V reference or ground to the sensor
  • Internal PCM input failure (verify after wiring/sensor checks)

Fault status

⚠️ Status
Power Steering Pressure Sensor/Switch Circuit Low — ECM detects the pressure sensor signal voltage is below the expected range (circuit reading near ground).
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0551 P0553 P0522 P0521
856

Browse 856 MERCEDES-BENZ manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

MERCEDES-BENZ

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+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email

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