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Home / DTC / P0228 — Throttle/Pedal Position Sensor/Switch C Circuit High

P0228 — Throttle/Pedal Position Sensor/Switch C Circuit High

Detailed page for trouble code P0228.

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22,491specific
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Code

P0228

Generic P — Powertrain

Throttle/Pedal Position Sensor/Switch C Circuit High

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

Causes

  • Shorted signal wire to 5V or battery voltage
  • Failed throttle/pedal position sensor (internal short or failed electronics)
  • Corroded or damaged connector or wiring (poor insulation allowing voltage feedback)
  • Open or high-resistance ground or reference circuit causing abnormal readings
  • PCM/input module fault or internal pull-up/pull-down failure
  • Aftermarket electronics or recent repairs that disturbed harness routing

Symptoms

  • Malfunction Indicator Lamp (MIL) illuminated
  • Reduced engine power / limp-home mode
  • Erratic or unresponsive throttle response
  • High or unstable idle
  • Possible poor drivability, surging, or hesitation

What to check

  • Read DTC(s) and freeze frame/live data; note conditions when code set
  • Visually inspect sensor connector and wiring for damage, corrosion, pin push-out, or water
  • Back-probe the sensor connector and measure signal, 5V reference, and ground with key ON (engine OFF)
  • Wiggle test wiring while monitoring live data for intermittent faults
  • Check related fuses and fused power/5V reference circuits
  • Compare sensor C voltage to other throttle/pedal sensors (if present) using live data

Signal parameters

  • Typical TPS/PPS signal: 0–5.0 V (depends on design)
  • Closed/throttle rest (typical): ~0.5–1.5 V (vehicle dependent)
  • Wide-open throttle (typical): ~3.5–4.5 V
  • Fault condition: signal voltage above normal upper limit (e.g., ≥4.9–5.0 V or near battery voltage)
  • Reference supply: stable +5 V (key ON, engine OFF) at the sensor reference terminal
  • Ground: near 0 V with good continuity to chassis/ECU ground

Diagnostic algorithm

  1. Record all active and pending codes, freeze frame, and live data for all throttle/pedal sensors.
  2. Perform a thorough visual inspection of the harness/connector at the sensor and along the routing for chafing, pin corrosion, melted insulation, or water.
  3. With key ON (engine OFF) back-probe the connector: verify +5V reference present and stable, check sensor ground continuity to chassis/ECU ground, and measure the signal voltage. Note any voltages at rest.
  4. If the signal reads high, disconnect the sensor connector and re-check the signal at the harness side (back-probed). If the harness signal remains high with the sensor unplugged, suspect wiring short to 5V/12V or PCM fault.
  5. If the harness signal is normal when disconnected, reconnect and check at the sensor pins while gently wiggling the harness for intermittent faults. Replace sensor if internal fault is suspected.
  6. Check continuity between the sensor signal pin and the PCM input. Repair any shorts to the 5V reference or battery power and any open/poor grounds. Repair/replace damaged wiring or connectors.

Likely causes

  • Signal wire shorted to the 5V reference or constant 12V
  • Failed sensor producing an out-of-range output voltage
  • Water intrusion or corrosion at the connector causing intermittent high voltage
  • Blown fuse or connector issue on the 5V reference (causing abnormal circuit behavior)
  • PCM input driver fault (less common)

Fault status

⚠️ Status
PCM detected voltage on Throttle/Pedal Position Sensor Circuit C higher than allowed. Check sensor, wiring, reference and grounds; possible short to 5V/12V or sensor/ECU failure.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

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Code

P0228

GWM P — Powertrain

- High Throttle Position Sensor / Switch C

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

Causes

  • Shorted signal wire to 5V or battery voltage
  • Failed throttle/pedal position sensor (internal short or failed electronics)
  • Corroded or damaged connector or wiring (poor insulation allowing voltage feedback)
  • Open or high-resistance ground or reference circuit causing abnormal readings
  • PCM/input module fault or internal pull-up/pull-down failure
  • Aftermarket electronics or recent repairs that disturbed harness routing

Symptoms

  • Malfunction Indicator Lamp (MIL) illuminated
  • Reduced engine power / limp-home mode
  • Erratic or unresponsive throttle response
  • High or unstable idle
  • Possible poor drivability, surging, or hesitation

What to check

  • Read DTC(s) and freeze frame/live data; note conditions when code set
  • Visually inspect sensor connector and wiring for damage, corrosion, pin push-out, or water
  • Back-probe the sensor connector and measure signal, 5V reference, and ground with key ON (engine OFF)
  • Wiggle test wiring while monitoring live data for intermittent faults
  • Check related fuses and fused power/5V reference circuits
  • Compare sensor C voltage to other throttle/pedal sensors (if present) using live data

Signal parameters

  • Typical TPS/PPS signal: 0–5.0 V (depends on design)
  • Closed/throttle rest (typical): ~0.5–1.5 V (vehicle dependent)
  • Wide-open throttle (typical): ~3.5–4.5 V
  • Fault condition: signal voltage above normal upper limit (e.g., ≥4.9–5.0 V or near battery voltage)
  • Reference supply: stable +5 V (key ON, engine OFF) at the sensor reference terminal
  • Ground: near 0 V with good continuity to chassis/ECU ground

Diagnostic algorithm

  1. Record all active and pending codes, freeze frame, and live data for all throttle/pedal sensors.
  2. Perform a thorough visual inspection of the harness/connector at the sensor and along the routing for chafing, pin corrosion, melted insulation, or water.
  3. With key ON (engine OFF) back-probe the connector: verify +5V reference present and stable, check sensor ground continuity to chassis/ECU ground, and measure the signal voltage. Note any voltages at rest.
  4. If the signal reads high, disconnect the sensor connector and re-check the signal at the harness side (back-probed). If the harness signal remains high with the sensor unplugged, suspect wiring short to 5V/12V or PCM fault.
  5. If the harness signal is normal when disconnected, reconnect and check at the sensor pins while gently wiggling the harness for intermittent faults. Replace sensor if internal fault is suspected.
  6. Check continuity between the sensor signal pin and the PCM input. Repair any shorts to the 5V reference or battery power and any open/poor grounds. Repair/replace damaged wiring or connectors.

Likely causes

  • Signal wire shorted to the 5V reference or constant 12V
  • Failed sensor producing an out-of-range output voltage
  • Water intrusion or corrosion at the connector causing intermittent high voltage
  • Blown fuse or connector issue on the 5V reference (causing abnormal circuit behavior)
  • PCM input driver fault (less common)

Fault status

⚠️ Status
PCM detected voltage on Throttle/Pedal Position Sensor Circuit C higher than allowed. Check sensor, wiring, reference and grounds; possible short to 5V/12V or sensor/ECU failure.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0122 P0123 P0220 P0221 P0223 P2135
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Code

P0228

HUMMER P — Powertrain

APP Sensor 3 Circuit High Voltage

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

Causes

  • Shorted signal wire to 5V or battery voltage
  • Failed throttle/pedal position sensor (internal short or failed electronics)
  • Corroded or damaged connector or wiring (poor insulation allowing voltage feedback)
  • Open or high-resistance ground or reference circuit causing abnormal readings
  • PCM/input module fault or internal pull-up/pull-down failure
  • Aftermarket electronics or recent repairs that disturbed harness routing

Symptoms

  • Malfunction Indicator Lamp (MIL) illuminated
  • Reduced engine power / limp-home mode
  • Erratic or unresponsive throttle response
  • High or unstable idle
  • Possible poor drivability, surging, or hesitation

What to check

  • Read DTC(s) and freeze frame/live data; note conditions when code set
  • Visually inspect sensor connector and wiring for damage, corrosion, pin push-out, or water
  • Back-probe the sensor connector and measure signal, 5V reference, and ground with key ON (engine OFF)
  • Wiggle test wiring while monitoring live data for intermittent faults
  • Check related fuses and fused power/5V reference circuits
  • Compare sensor C voltage to other throttle/pedal sensors (if present) using live data

Signal parameters

  • Typical TPS/PPS signal: 0–5.0 V (depends on design)
  • Closed/throttle rest (typical): ~0.5–1.5 V (vehicle dependent)
  • Wide-open throttle (typical): ~3.5–4.5 V
  • Fault condition: signal voltage above normal upper limit (e.g., ≥4.9–5.0 V or near battery voltage)
  • Reference supply: stable +5 V (key ON, engine OFF) at the sensor reference terminal
  • Ground: near 0 V with good continuity to chassis/ECU ground

Diagnostic algorithm

  1. Record all active and pending codes, freeze frame, and live data for all throttle/pedal sensors.
  2. Perform a thorough visual inspection of the harness/connector at the sensor and along the routing for chafing, pin corrosion, melted insulation, or water.
  3. With key ON (engine OFF) back-probe the connector: verify +5V reference present and stable, check sensor ground continuity to chassis/ECU ground, and measure the signal voltage. Note any voltages at rest.
  4. If the signal reads high, disconnect the sensor connector and re-check the signal at the harness side (back-probed). If the harness signal remains high with the sensor unplugged, suspect wiring short to 5V/12V or PCM fault.
  5. If the harness signal is normal when disconnected, reconnect and check at the sensor pins while gently wiggling the harness for intermittent faults. Replace sensor if internal fault is suspected.
  6. Check continuity between the sensor signal pin and the PCM input. Repair any shorts to the 5V reference or battery power and any open/poor grounds. Repair/replace damaged wiring or connectors.

Likely causes

  • Signal wire shorted to the 5V reference or constant 12V
  • Failed sensor producing an out-of-range output voltage
  • Water intrusion or corrosion at the connector causing intermittent high voltage
  • Blown fuse or connector issue on the 5V reference (causing abnormal circuit behavior)
  • PCM input driver fault (less common)

Fault status

⚠️ Status
PCM detected voltage on Throttle/Pedal Position Sensor Circuit C higher than allowed. Check sensor, wiring, reference and grounds; possible short to 5V/12V or sensor/ECU failure.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0122 P0123 P0220 P0221 P0223 P2135
Repair manuals

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Code

P0228

LAND ROVER P — Powertrain

Throttle Position Sensor C High Input

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

Causes

  • Shorted signal wire to 5V or battery voltage
  • Failed throttle/pedal position sensor (internal short or failed electronics)
  • Corroded or damaged connector or wiring (poor insulation allowing voltage feedback)
  • Open or high-resistance ground or reference circuit causing abnormal readings
  • PCM/input module fault or internal pull-up/pull-down failure
  • Aftermarket electronics or recent repairs that disturbed harness routing

Symptoms

  • Malfunction Indicator Lamp (MIL) illuminated
  • Reduced engine power / limp-home mode
  • Erratic or unresponsive throttle response
  • High or unstable idle
  • Possible poor drivability, surging, or hesitation

What to check

  • Read DTC(s) and freeze frame/live data; note conditions when code set
  • Visually inspect sensor connector and wiring for damage, corrosion, pin push-out, or water
  • Back-probe the sensor connector and measure signal, 5V reference, and ground with key ON (engine OFF)
  • Wiggle test wiring while monitoring live data for intermittent faults
  • Check related fuses and fused power/5V reference circuits
  • Compare sensor C voltage to other throttle/pedal sensors (if present) using live data

Signal parameters

  • Typical TPS/PPS signal: 0–5.0 V (depends on design)
  • Closed/throttle rest (typical): ~0.5–1.5 V (vehicle dependent)
  • Wide-open throttle (typical): ~3.5–4.5 V
  • Fault condition: signal voltage above normal upper limit (e.g., ≥4.9–5.0 V or near battery voltage)
  • Reference supply: stable +5 V (key ON, engine OFF) at the sensor reference terminal
  • Ground: near 0 V with good continuity to chassis/ECU ground

Diagnostic algorithm

  1. Record all active and pending codes, freeze frame, and live data for all throttle/pedal sensors.
  2. Perform a thorough visual inspection of the harness/connector at the sensor and along the routing for chafing, pin corrosion, melted insulation, or water.
  3. With key ON (engine OFF) back-probe the connector: verify +5V reference present and stable, check sensor ground continuity to chassis/ECU ground, and measure the signal voltage. Note any voltages at rest.
  4. If the signal reads high, disconnect the sensor connector and re-check the signal at the harness side (back-probed). If the harness signal remains high with the sensor unplugged, suspect wiring short to 5V/12V or PCM fault.
  5. If the harness signal is normal when disconnected, reconnect and check at the sensor pins while gently wiggling the harness for intermittent faults. Replace sensor if internal fault is suspected.
  6. Check continuity between the sensor signal pin and the PCM input. Repair any shorts to the 5V reference or battery power and any open/poor grounds. Repair/replace damaged wiring or connectors.

Likely causes

  • Signal wire shorted to the 5V reference or constant 12V
  • Failed sensor producing an out-of-range output voltage
  • Water intrusion or corrosion at the connector causing intermittent high voltage
  • Blown fuse or connector issue on the 5V reference (causing abnormal circuit behavior)
  • PCM input driver fault (less common)

Fault status

⚠️ Status
PCM detected voltage on Throttle/Pedal Position Sensor Circuit C higher than allowed. Check sensor, wiring, reference and grounds; possible short to 5V/12V or sensor/ECU failure.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0122 P0123 P0220 P0221 P0223 P2135
320

Browse 320 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

LAND ROVER

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

P0228

MITSUBISHI P — Powertrain

APS(sub) high

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

Causes

  • Shorted signal wire to 5V or battery voltage
  • Failed throttle/pedal position sensor (internal short or failed electronics)
  • Corroded or damaged connector or wiring (poor insulation allowing voltage feedback)
  • Open or high-resistance ground or reference circuit causing abnormal readings
  • PCM/input module fault or internal pull-up/pull-down failure
  • Aftermarket electronics or recent repairs that disturbed harness routing

Symptoms

  • Malfunction Indicator Lamp (MIL) illuminated
  • Reduced engine power / limp-home mode
  • Erratic or unresponsive throttle response
  • High or unstable idle
  • Possible poor drivability, surging, or hesitation

What to check

  • Read DTC(s) and freeze frame/live data; note conditions when code set
  • Visually inspect sensor connector and wiring for damage, corrosion, pin push-out, or water
  • Back-probe the sensor connector and measure signal, 5V reference, and ground with key ON (engine OFF)
  • Wiggle test wiring while monitoring live data for intermittent faults
  • Check related fuses and fused power/5V reference circuits
  • Compare sensor C voltage to other throttle/pedal sensors (if present) using live data

Signal parameters

  • Typical TPS/PPS signal: 0–5.0 V (depends on design)
  • Closed/throttle rest (typical): ~0.5–1.5 V (vehicle dependent)
  • Wide-open throttle (typical): ~3.5–4.5 V
  • Fault condition: signal voltage above normal upper limit (e.g., ≥4.9–5.0 V or near battery voltage)
  • Reference supply: stable +5 V (key ON, engine OFF) at the sensor reference terminal
  • Ground: near 0 V with good continuity to chassis/ECU ground

Diagnostic algorithm

  1. Record all active and pending codes, freeze frame, and live data for all throttle/pedal sensors.
  2. Perform a thorough visual inspection of the harness/connector at the sensor and along the routing for chafing, pin corrosion, melted insulation, or water.
  3. With key ON (engine OFF) back-probe the connector: verify +5V reference present and stable, check sensor ground continuity to chassis/ECU ground, and measure the signal voltage. Note any voltages at rest.
  4. If the signal reads high, disconnect the sensor connector and re-check the signal at the harness side (back-probed). If the harness signal remains high with the sensor unplugged, suspect wiring short to 5V/12V or PCM fault.
  5. If the harness signal is normal when disconnected, reconnect and check at the sensor pins while gently wiggling the harness for intermittent faults. Replace sensor if internal fault is suspected.
  6. Check continuity between the sensor signal pin and the PCM input. Repair any shorts to the 5V reference or battery power and any open/poor grounds. Repair/replace damaged wiring or connectors.

Likely causes

  • Signal wire shorted to the 5V reference or constant 12V
  • Failed sensor producing an out-of-range output voltage
  • Water intrusion or corrosion at the connector causing intermittent high voltage
  • Blown fuse or connector issue on the 5V reference (causing abnormal circuit behavior)
  • PCM input driver fault (less common)

Fault status

⚠️ Status
PCM detected voltage on Throttle/Pedal Position Sensor Circuit C higher than allowed. Check sensor, wiring, reference and grounds; possible short to 5V/12V or sensor/ECU failure.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

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406

Browse 406 MITSUBISHI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

MITSUBISHI

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