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Home / DTC / P0553 — Power Steering Pressure Sensor/Switch Circuit High

P0553 — Power Steering Pressure Sensor/Switch Circuit High

Detailed page for trouble code P0553.

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59brands
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22,491specific
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Code

P0553

Generic P — Powertrain

Power Steering Pressure Sensor/Switch Circuit High

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

Causes

  • Faulty power steering pressure sensor or switch
  • Short to battery voltage on sensor signal or supply circuit
  • Poor or corroded connector or pin (sensor harness)
  • Open or damaged ground returning to PCM/PSCM
  • Internal failure of power steering control module or PCM
  • Excessive system pressure or hydraulic fault causing sensor damage

Symptoms

  • Malfunction Indicator Lamp (MIL) or power steering warning lamp illuminated
  • Reduced or lost electric/hydraulic power assist depending on system
  • Heavier steering effort at low speed
  • Erratic or inconsistent steering assist
  • Possible limp-home mode or related drivability messages

What to check

  • Read stored and pending codes and note freeze-frame data
  • View live data for power steering pressure/switch values at key ON and engine running
  • Visually inspect sensor connector and wiring for damage, corrosion, or pin issues
  • Backprobe signal, reference, and ground circuits with DVOM/oscilloscope
  • Verify reference voltage (typically ~5 V) and ground integrity at the sensor
  • Compare sensor output to expected signal range while turning wheel/creating assist demand

Signal parameters

  • Typical sensor type: 3-wire transducer (5 V reference, signal, ground) or switch
  • Expected signal range: approximately 0.5–4.5 V proportional to pressure (varies by manufacturer)
  • Circuit HIGH condition: signal voltage near supply voltage (e.g., >4.5–4.9 V) or out-of-range high
  • Reference voltage: ~5 V (verify exact value per vehicle)
  • Ground: near 0 V with low resistance to chassis ground

Diagnostic algorithm

  1. Record freeze-frame and note operating conditions when the code set. Clear codes and re-run to confirm repeatability.
  2. Visually inspect the power steering pressure sensor and harness for damage, corrosion, loose pins, or fluid contamination. Repair or secure connector as needed.
  3. With key ON (engine off), backprobe the sensor connector and confirm reference voltage (≈5 V), signal voltage, and ground continuity to PCM/PSCM. Repair any missing reference or open ground.
  4. If reference and ground are good but signal reads high, unplug the sensor and measure signal circuit voltage at the harness. If signal stays high with sensor unplugged, suspect short to battery voltage in the wiring; trace and repair the short.
  5. If signal drops to expected voltage with sensor unplugged, bench-test or replace the sensor. Compare replacement sensor output to known-good values and confirm proper operation while applying pressure (or during steering input).
  6. If wiring is suspect, perform resistance checks and wiggle tests while monitoring live data to locate intermittent opens/shorts. Repair or replace damaged wiring/harness as required.
  7. If wiring and sensor are verified good, test power steering control module/PCM inputs and outputs. Consult manufacturer procedures for module diagnostics; replace module only after confirming upstream circuits are good.
  8. After repair or component replacement, clear codes, perform relevant self-tests and a road test under the same conditions that caused the code to ensure the fault does not return.

Likely causes

  • Sensor internal short or failed output (stuck high)
  • Power (5V or battery) supply shorted to the signal wire
  • Disconnected or corroded ground at the sensor or module
  • Pin pushed out or bent in the sensor connector
  • Damaged wiring harness (chafed, pinched) contacting battery voltage
  • Intermittent connector contact causing spurious high readings

Fault status

⚠️ Status
Power Steering Pressure Sensor/Switch Circuit High — signal voltage above expected range (possible short to battery, sensor failure, or wiring/connector fault).
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0551 P0522 P0530 P0606 P0626
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Code

P0553

GWM P — Powertrain

- High indicator of the pressure sensor in the power steering

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

Causes

  • Faulty power steering pressure sensor or switch
  • Short to battery voltage on sensor signal or supply circuit
  • Poor or corroded connector or pin (sensor harness)
  • Open or damaged ground returning to PCM/PSCM
  • Internal failure of power steering control module or PCM
  • Excessive system pressure or hydraulic fault causing sensor damage

Symptoms

  • Malfunction Indicator Lamp (MIL) or power steering warning lamp illuminated
  • Reduced or lost electric/hydraulic power assist depending on system
  • Heavier steering effort at low speed
  • Erratic or inconsistent steering assist
  • Possible limp-home mode or related drivability messages

What to check

  • Read stored and pending codes and note freeze-frame data
  • View live data for power steering pressure/switch values at key ON and engine running
  • Visually inspect sensor connector and wiring for damage, corrosion, or pin issues
  • Backprobe signal, reference, and ground circuits with DVOM/oscilloscope
  • Verify reference voltage (typically ~5 V) and ground integrity at the sensor
  • Compare sensor output to expected signal range while turning wheel/creating assist demand

Signal parameters

  • Typical sensor type: 3-wire transducer (5 V reference, signal, ground) or switch
  • Expected signal range: approximately 0.5–4.5 V proportional to pressure (varies by manufacturer)
  • Circuit HIGH condition: signal voltage near supply voltage (e.g., >4.5–4.9 V) or out-of-range high
  • Reference voltage: ~5 V (verify exact value per vehicle)
  • Ground: near 0 V with low resistance to chassis ground

Diagnostic algorithm

  1. Record freeze-frame and note operating conditions when the code set. Clear codes and re-run to confirm repeatability.
  2. Visually inspect the power steering pressure sensor and harness for damage, corrosion, loose pins, or fluid contamination. Repair or secure connector as needed.
  3. With key ON (engine off), backprobe the sensor connector and confirm reference voltage (≈5 V), signal voltage, and ground continuity to PCM/PSCM. Repair any missing reference or open ground.
  4. If reference and ground are good but signal reads high, unplug the sensor and measure signal circuit voltage at the harness. If signal stays high with sensor unplugged, suspect short to battery voltage in the wiring; trace and repair the short.
  5. If signal drops to expected voltage with sensor unplugged, bench-test or replace the sensor. Compare replacement sensor output to known-good values and confirm proper operation while applying pressure (or during steering input).
  6. If wiring is suspect, perform resistance checks and wiggle tests while monitoring live data to locate intermittent opens/shorts. Repair or replace damaged wiring/harness as required.
  7. If wiring and sensor are verified good, test power steering control module/PCM inputs and outputs. Consult manufacturer procedures for module diagnostics; replace module only after confirming upstream circuits are good.
  8. After repair or component replacement, clear codes, perform relevant self-tests and a road test under the same conditions that caused the code to ensure the fault does not return.

Likely causes

  • Sensor internal short or failed output (stuck high)
  • Power (5V or battery) supply shorted to the signal wire
  • Disconnected or corroded ground at the sensor or module
  • Pin pushed out or bent in the sensor connector
  • Damaged wiring harness (chafed, pinched) contacting battery voltage
  • Intermittent connector contact causing spurious high readings

Fault status

⚠️ Status
Power Steering Pressure Sensor/Switch Circuit High — signal voltage above expected range (possible short to battery, sensor failure, or wiring/connector fault).
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0551 P0522 P0530 P0606 P0626
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Code

P0553

HUMMER P — Powertrain

Power Steering Pressure Sensor Circuit High Input

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

Causes

  • Faulty power steering pressure sensor or switch
  • Short to battery voltage on sensor signal or supply circuit
  • Poor or corroded connector or pin (sensor harness)
  • Open or damaged ground returning to PCM/PSCM
  • Internal failure of power steering control module or PCM
  • Excessive system pressure or hydraulic fault causing sensor damage

Symptoms

  • Malfunction Indicator Lamp (MIL) or power steering warning lamp illuminated
  • Reduced or lost electric/hydraulic power assist depending on system
  • Heavier steering effort at low speed
  • Erratic or inconsistent steering assist
  • Possible limp-home mode or related drivability messages

What to check

  • Read stored and pending codes and note freeze-frame data
  • View live data for power steering pressure/switch values at key ON and engine running
  • Visually inspect sensor connector and wiring for damage, corrosion, or pin issues
  • Backprobe signal, reference, and ground circuits with DVOM/oscilloscope
  • Verify reference voltage (typically ~5 V) and ground integrity at the sensor
  • Compare sensor output to expected signal range while turning wheel/creating assist demand

Signal parameters

  • Typical sensor type: 3-wire transducer (5 V reference, signal, ground) or switch
  • Expected signal range: approximately 0.5–4.5 V proportional to pressure (varies by manufacturer)
  • Circuit HIGH condition: signal voltage near supply voltage (e.g., >4.5–4.9 V) or out-of-range high
  • Reference voltage: ~5 V (verify exact value per vehicle)
  • Ground: near 0 V with low resistance to chassis ground

Diagnostic algorithm

  1. Record freeze-frame and note operating conditions when the code set. Clear codes and re-run to confirm repeatability.
  2. Visually inspect the power steering pressure sensor and harness for damage, corrosion, loose pins, or fluid contamination. Repair or secure connector as needed.
  3. With key ON (engine off), backprobe the sensor connector and confirm reference voltage (≈5 V), signal voltage, and ground continuity to PCM/PSCM. Repair any missing reference or open ground.
  4. If reference and ground are good but signal reads high, unplug the sensor and measure signal circuit voltage at the harness. If signal stays high with sensor unplugged, suspect short to battery voltage in the wiring; trace and repair the short.
  5. If signal drops to expected voltage with sensor unplugged, bench-test or replace the sensor. Compare replacement sensor output to known-good values and confirm proper operation while applying pressure (or during steering input).
  6. If wiring is suspect, perform resistance checks and wiggle tests while monitoring live data to locate intermittent opens/shorts. Repair or replace damaged wiring/harness as required.
  7. If wiring and sensor are verified good, test power steering control module/PCM inputs and outputs. Consult manufacturer procedures for module diagnostics; replace module only after confirming upstream circuits are good.
  8. After repair or component replacement, clear codes, perform relevant self-tests and a road test under the same conditions that caused the code to ensure the fault does not return.

Likely causes

  • Sensor internal short or failed output (stuck high)
  • Power (5V or battery) supply shorted to the signal wire
  • Disconnected or corroded ground at the sensor or module
  • Pin pushed out or bent in the sensor connector
  • Damaged wiring harness (chafed, pinched) contacting battery voltage
  • Intermittent connector contact causing spurious high readings

Fault status

⚠️ Status
Power Steering Pressure Sensor/Switch Circuit High — signal voltage above expected range (possible short to battery, sensor failure, or wiring/connector fault).
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0551 P0522 P0530 P0606 P0626
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

P0553

MERCEDES-BENZ P — Powertrain

Power Steering Pressure Sensor Circuit High Input

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

Causes

  • Faulty power steering pressure sensor or switch
  • Short to battery voltage on sensor signal or supply circuit
  • Poor or corroded connector or pin (sensor harness)
  • Open or damaged ground returning to PCM/PSCM
  • Internal failure of power steering control module or PCM
  • Excessive system pressure or hydraulic fault causing sensor damage

Symptoms

  • Malfunction Indicator Lamp (MIL) or power steering warning lamp illuminated
  • Reduced or lost electric/hydraulic power assist depending on system
  • Heavier steering effort at low speed
  • Erratic or inconsistent steering assist
  • Possible limp-home mode or related drivability messages

What to check

  • Read stored and pending codes and note freeze-frame data
  • View live data for power steering pressure/switch values at key ON and engine running
  • Visually inspect sensor connector and wiring for damage, corrosion, or pin issues
  • Backprobe signal, reference, and ground circuits with DVOM/oscilloscope
  • Verify reference voltage (typically ~5 V) and ground integrity at the sensor
  • Compare sensor output to expected signal range while turning wheel/creating assist demand

Signal parameters

  • Typical sensor type: 3-wire transducer (5 V reference, signal, ground) or switch
  • Expected signal range: approximately 0.5–4.5 V proportional to pressure (varies by manufacturer)
  • Circuit HIGH condition: signal voltage near supply voltage (e.g., >4.5–4.9 V) or out-of-range high
  • Reference voltage: ~5 V (verify exact value per vehicle)
  • Ground: near 0 V with low resistance to chassis ground

Diagnostic algorithm

  1. Record freeze-frame and note operating conditions when the code set. Clear codes and re-run to confirm repeatability.
  2. Visually inspect the power steering pressure sensor and harness for damage, corrosion, loose pins, or fluid contamination. Repair or secure connector as needed.
  3. With key ON (engine off), backprobe the sensor connector and confirm reference voltage (≈5 V), signal voltage, and ground continuity to PCM/PSCM. Repair any missing reference or open ground.
  4. If reference and ground are good but signal reads high, unplug the sensor and measure signal circuit voltage at the harness. If signal stays high with sensor unplugged, suspect short to battery voltage in the wiring; trace and repair the short.
  5. If signal drops to expected voltage with sensor unplugged, bench-test or replace the sensor. Compare replacement sensor output to known-good values and confirm proper operation while applying pressure (or during steering input).
  6. If wiring is suspect, perform resistance checks and wiggle tests while monitoring live data to locate intermittent opens/shorts. Repair or replace damaged wiring/harness as required.
  7. If wiring and sensor are verified good, test power steering control module/PCM inputs and outputs. Consult manufacturer procedures for module diagnostics; replace module only after confirming upstream circuits are good.
  8. After repair or component replacement, clear codes, perform relevant self-tests and a road test under the same conditions that caused the code to ensure the fault does not return.

Likely causes

  • Sensor internal short or failed output (stuck high)
  • Power (5V or battery) supply shorted to the signal wire
  • Disconnected or corroded ground at the sensor or module
  • Pin pushed out or bent in the sensor connector
  • Damaged wiring harness (chafed, pinched) contacting battery voltage
  • Intermittent connector contact causing spurious high readings

Fault status

⚠️ Status
Power Steering Pressure Sensor/Switch Circuit High — signal voltage above expected range (possible short to battery, sensor failure, or wiring/connector fault).
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0551 P0522 P0530 P0606 P0626
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.
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