Home / DTC / P1219 — Throttle Position Sensor Refernce Voltage

P1219 — Throttle Position Sensor Refernce Voltage

Detailed page for trouble code P1219.

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Code

P1219

BUICK P — Powertrain

Throttle Position Sensor Refernce Voltage

Brand: BUICK
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or short in TPS reference (5V) wiring
  • Corroded, loose, or damaged TPS connector pins
  • Failed TPS (internal short/opens)
  • Faulty ECM voltage reference or internal ECM fault
  • Low battery voltage or poor battery/charging system condition
  • Aftermarket equipment or repairs that damaged wiring

Symptoms

  • Check Engine Light (MIL) on
  • Poor or erratic throttle response, hesitation, or surging
  • Reduced engine power or limp-in mode
  • Hard starting or stalling at idle
  • Inconsistent idle speed
  • Possible lack of speed/power with accelerator pedal input not responding smoothly

What to check

  • Read and record freeze frame and pending codes with scan tool
  • Inspect TPS connector and wiring for corrosion, damage, or disconnection
  • Measure battery voltage and charging system health
  • Backprobe TPS connector to verify reference (5V) present with ignition ON
  • Check TPS signal voltage at closed throttle and during throttle movement
  • Check ground continuity from TPS ground to chassis/ECM ground

Signal parameters

  • Reference (5V) supply to TPS: typically about 5.0 V (acceptable ~4.5–5.5 V depending on manufacturer spec)
  • TPS signal voltage at closed throttle: typically ~0.2–1.0 V
  • TPS signal voltage at wide open throttle: typically ~4.0–4.8 V
  • Signal should change smoothly and monotonically with throttle opening (no jumps or drops)

Diagnostic algorithm

  1. Connect a scan tool, record code(s), and note freeze-frame data.
  2. Visually inspect TPS connector and wiring for corrosion, bent pins, damage, or water intrusion; repair as needed.
  3. Verify battery voltage and charging system; repair low voltage issues first.
  4. With ignition ON (engine OFF), backprobe TPS connector: verify reference wire has ~5 V. If no 5V, trace to ECM and check for short to ground or open.
  5. If 5V present, measure TPS signal voltage at closed throttle — should be ~0.2–1.0 V. Slowly open throttle and watch for smooth increase to ~4.0–4.8 V. If erratic, suspect TPS.
  6. If reference is missing or incorrect, check continuity between reference wire and ECM pin; repair short/open. If continuity good and no wiring fault, suspect ECM reference circuitry failure.
  7. If wiring and reference OK but signal out of range or inconsistent, replace TPS and retest.
  8. After repairs, clear codes, perform relearn procedures if required by manufacturer, and road test to confirm repair and code not recurring.

Likely causes

  • Damaged or corroded TPS connector or pins
  • Short to ground or short to battery on the 5V reference wire
  • Failed TPS sensor
  • Poor ground or low battery/charging voltage causing false readings

Fault status

⚠️ Status
ECM detected the throttle position sensor reference voltage out of range or absent. Code P1219 stored when the expected reference voltage to the TPS is not within specification, indicating a possible wiring, connector, sensor, or ECM issue.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5 - 2.0 hours

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Code

P1219

CADILLAC P — Powertrain

Throttle Position Sensor Reference Voltage

Brand: CADILLAC
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or short in TPS reference (5V) wiring
  • Corroded, loose, or damaged TPS connector pins
  • Failed TPS (internal short/opens)
  • Faulty ECM voltage reference or internal ECM fault
  • Low battery voltage or poor battery/charging system condition
  • Aftermarket equipment or repairs that damaged wiring

Symptoms

  • Check Engine Light (MIL) on
  • Poor or erratic throttle response, hesitation, or surging
  • Reduced engine power or limp-in mode
  • Hard starting or stalling at idle
  • Inconsistent idle speed
  • Possible lack of speed/power with accelerator pedal input not responding smoothly

What to check

  • Read and record freeze frame and pending codes with scan tool
  • Inspect TPS connector and wiring for corrosion, damage, or disconnection
  • Measure battery voltage and charging system health
  • Backprobe TPS connector to verify reference (5V) present with ignition ON
  • Check TPS signal voltage at closed throttle and during throttle movement
  • Check ground continuity from TPS ground to chassis/ECM ground

Signal parameters

  • Reference (5V) supply to TPS: typically about 5.0 V (acceptable ~4.5–5.5 V depending on manufacturer spec)
  • TPS signal voltage at closed throttle: typically ~0.2–1.0 V
  • TPS signal voltage at wide open throttle: typically ~4.0–4.8 V
  • Signal should change smoothly and monotonically with throttle opening (no jumps or drops)

Diagnostic algorithm

  1. Connect a scan tool, record code(s), and note freeze-frame data.
  2. Visually inspect TPS connector and wiring for corrosion, bent pins, damage, or water intrusion; repair as needed.
  3. Verify battery voltage and charging system; repair low voltage issues first.
  4. With ignition ON (engine OFF), backprobe TPS connector: verify reference wire has ~5 V. If no 5V, trace to ECM and check for short to ground or open.
  5. If 5V present, measure TPS signal voltage at closed throttle — should be ~0.2–1.0 V. Slowly open throttle and watch for smooth increase to ~4.0–4.8 V. If erratic, suspect TPS.
  6. If reference is missing or incorrect, check continuity between reference wire and ECM pin; repair short/open. If continuity good and no wiring fault, suspect ECM reference circuitry failure.
  7. If wiring and reference OK but signal out of range or inconsistent, replace TPS and retest.
  8. After repairs, clear codes, perform relearn procedures if required by manufacturer, and road test to confirm repair and code not recurring.

Likely causes

  • Damaged or corroded TPS connector or pins
  • Short to ground or short to battery on the 5V reference wire
  • Failed TPS sensor
  • Poor ground or low battery/charging voltage causing false readings

Fault status

⚠️ Status
ECM detected the throttle position sensor reference voltage out of range or absent. Code P1219 stored when the expected reference voltage to the TPS is not within specification, indicating a possible wiring, connector, sensor, or ECM issue.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5 - 2.0 hours

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Code

P1219

CHEVROLET P — Powertrain

Throttle Position Sensor Reference Voltage

AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or short in TPS reference (5V) wiring
  • Corroded, loose, or damaged TPS connector pins
  • Failed TPS (internal short/opens)
  • Faulty ECM voltage reference or internal ECM fault
  • Low battery voltage or poor battery/charging system condition
  • Aftermarket equipment or repairs that damaged wiring

Symptoms

  • Check Engine Light (MIL) on
  • Poor or erratic throttle response, hesitation, or surging
  • Reduced engine power or limp-in mode
  • Hard starting or stalling at idle
  • Inconsistent idle speed
  • Possible lack of speed/power with accelerator pedal input not responding smoothly

What to check

  • Read and record freeze frame and pending codes with scan tool
  • Inspect TPS connector and wiring for corrosion, damage, or disconnection
  • Measure battery voltage and charging system health
  • Backprobe TPS connector to verify reference (5V) present with ignition ON
  • Check TPS signal voltage at closed throttle and during throttle movement
  • Check ground continuity from TPS ground to chassis/ECM ground

Signal parameters

  • Reference (5V) supply to TPS: typically about 5.0 V (acceptable ~4.5–5.5 V depending on manufacturer spec)
  • TPS signal voltage at closed throttle: typically ~0.2–1.0 V
  • TPS signal voltage at wide open throttle: typically ~4.0–4.8 V
  • Signal should change smoothly and monotonically with throttle opening (no jumps or drops)

Diagnostic algorithm

  1. Connect a scan tool, record code(s), and note freeze-frame data.
  2. Visually inspect TPS connector and wiring for corrosion, bent pins, damage, or water intrusion; repair as needed.
  3. Verify battery voltage and charging system; repair low voltage issues first.
  4. With ignition ON (engine OFF), backprobe TPS connector: verify reference wire has ~5 V. If no 5V, trace to ECM and check for short to ground or open.
  5. If 5V present, measure TPS signal voltage at closed throttle — should be ~0.2–1.0 V. Slowly open throttle and watch for smooth increase to ~4.0–4.8 V. If erratic, suspect TPS.
  6. If reference is missing or incorrect, check continuity between reference wire and ECM pin; repair short/open. If continuity good and no wiring fault, suspect ECM reference circuitry failure.
  7. If wiring and reference OK but signal out of range or inconsistent, replace TPS and retest.
  8. After repairs, clear codes, perform relearn procedures if required by manufacturer, and road test to confirm repair and code not recurring.

Likely causes

  • Damaged or corroded TPS connector or pins
  • Short to ground or short to battery on the 5V reference wire
  • Failed TPS sensor
  • Poor ground or low battery/charging voltage causing false readings

Fault status

⚠️ Status
ECM detected the throttle position sensor reference voltage out of range or absent. Code P1219 stored when the expected reference voltage to the TPS is not within specification, indicating a possible wiring, connector, sensor, or ECM issue.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5 - 2.0 hours

Similar codes

314

Browse 314 CHEVROLET manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

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Code

P1219

CHRYSLER P — Powertrain

Throttle Position Sensor Reference Voltage

Brand: CHRYSLER
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or short in TPS reference (5V) wiring
  • Corroded, loose, or damaged TPS connector pins
  • Failed TPS (internal short/opens)
  • Faulty ECM voltage reference or internal ECM fault
  • Low battery voltage or poor battery/charging system condition
  • Aftermarket equipment or repairs that damaged wiring

Symptoms

  • Check Engine Light (MIL) on
  • Poor or erratic throttle response, hesitation, or surging
  • Reduced engine power or limp-in mode
  • Hard starting or stalling at idle
  • Inconsistent idle speed
  • Possible lack of speed/power with accelerator pedal input not responding smoothly

What to check

  • Read and record freeze frame and pending codes with scan tool
  • Inspect TPS connector and wiring for corrosion, damage, or disconnection
  • Measure battery voltage and charging system health
  • Backprobe TPS connector to verify reference (5V) present with ignition ON
  • Check TPS signal voltage at closed throttle and during throttle movement
  • Check ground continuity from TPS ground to chassis/ECM ground

Signal parameters

  • Reference (5V) supply to TPS: typically about 5.0 V (acceptable ~4.5–5.5 V depending on manufacturer spec)
  • TPS signal voltage at closed throttle: typically ~0.2–1.0 V
  • TPS signal voltage at wide open throttle: typically ~4.0–4.8 V
  • Signal should change smoothly and monotonically with throttle opening (no jumps or drops)

Diagnostic algorithm

  1. Connect a scan tool, record code(s), and note freeze-frame data.
  2. Visually inspect TPS connector and wiring for corrosion, bent pins, damage, or water intrusion; repair as needed.
  3. Verify battery voltage and charging system; repair low voltage issues first.
  4. With ignition ON (engine OFF), backprobe TPS connector: verify reference wire has ~5 V. If no 5V, trace to ECM and check for short to ground or open.
  5. If 5V present, measure TPS signal voltage at closed throttle — should be ~0.2–1.0 V. Slowly open throttle and watch for smooth increase to ~4.0–4.8 V. If erratic, suspect TPS.
  6. If reference is missing or incorrect, check continuity between reference wire and ECM pin; repair short/open. If continuity good and no wiring fault, suspect ECM reference circuitry failure.
  7. If wiring and reference OK but signal out of range or inconsistent, replace TPS and retest.
  8. After repairs, clear codes, perform relearn procedures if required by manufacturer, and road test to confirm repair and code not recurring.

Likely causes

  • Damaged or corroded TPS connector or pins
  • Short to ground or short to battery on the 5V reference wire
  • Failed TPS sensor
  • Poor ground or low battery/charging voltage causing false readings

Fault status

⚠️ Status
ECM detected the throttle position sensor reference voltage out of range or absent. Code P1219 stored when the expected reference voltage to the TPS is not within specification, indicating a possible wiring, connector, sensor, or ECM issue.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5 - 2.0 hours

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Code

P1219

FORD P — Powertrain

CID Low

Brand: FORD
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or short in TPS reference (5V) wiring
  • Corroded, loose, or damaged TPS connector pins
  • Failed TPS (internal short/opens)
  • Faulty ECM voltage reference or internal ECM fault
  • Low battery voltage or poor battery/charging system condition
  • Aftermarket equipment or repairs that damaged wiring

Symptoms

  • Check Engine Light (MIL) on
  • Poor or erratic throttle response, hesitation, or surging
  • Reduced engine power or limp-in mode
  • Hard starting or stalling at idle
  • Inconsistent idle speed
  • Possible lack of speed/power with accelerator pedal input not responding smoothly

What to check

  • Read and record freeze frame and pending codes with scan tool
  • Inspect TPS connector and wiring for corrosion, damage, or disconnection
  • Measure battery voltage and charging system health
  • Backprobe TPS connector to verify reference (5V) present with ignition ON
  • Check TPS signal voltage at closed throttle and during throttle movement
  • Check ground continuity from TPS ground to chassis/ECM ground

Signal parameters

  • Reference (5V) supply to TPS: typically about 5.0 V (acceptable ~4.5–5.5 V depending on manufacturer spec)
  • TPS signal voltage at closed throttle: typically ~0.2–1.0 V
  • TPS signal voltage at wide open throttle: typically ~4.0–4.8 V
  • Signal should change smoothly and monotonically with throttle opening (no jumps or drops)

Diagnostic algorithm

  1. Connect a scan tool, record code(s), and note freeze-frame data.
  2. Visually inspect TPS connector and wiring for corrosion, bent pins, damage, or water intrusion; repair as needed.
  3. Verify battery voltage and charging system; repair low voltage issues first.
  4. With ignition ON (engine OFF), backprobe TPS connector: verify reference wire has ~5 V. If no 5V, trace to ECM and check for short to ground or open.
  5. If 5V present, measure TPS signal voltage at closed throttle — should be ~0.2–1.0 V. Slowly open throttle and watch for smooth increase to ~4.0–4.8 V. If erratic, suspect TPS.
  6. If reference is missing or incorrect, check continuity between reference wire and ECM pin; repair short/open. If continuity good and no wiring fault, suspect ECM reference circuitry failure.
  7. If wiring and reference OK but signal out of range or inconsistent, replace TPS and retest.
  8. After repairs, clear codes, perform relearn procedures if required by manufacturer, and road test to confirm repair and code not recurring.

Likely causes

  • Damaged or corroded TPS connector or pins
  • Short to ground or short to battery on the 5V reference wire
  • Failed TPS sensor
  • Poor ground or low battery/charging voltage causing false readings

Fault status

⚠️ Status
ECM detected the throttle position sensor reference voltage out of range or absent. Code P1219 stored when the expected reference voltage to the TPS is not within specification, indicating a possible wiring, connector, sensor, or ECM issue.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5 - 2.0 hours

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Code

P1219

GM P — Powertrain

Throttle Position Sensor Reference Voltage

Brand: GM
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or short in TPS reference (5V) wiring
  • Corroded, loose, or damaged TPS connector pins
  • Failed TPS (internal short/opens)
  • Faulty ECM voltage reference or internal ECM fault
  • Low battery voltage or poor battery/charging system condition
  • Aftermarket equipment or repairs that damaged wiring

Symptoms

  • Check Engine Light (MIL) on
  • Poor or erratic throttle response, hesitation, or surging
  • Reduced engine power or limp-in mode
  • Hard starting or stalling at idle
  • Inconsistent idle speed
  • Possible lack of speed/power with accelerator pedal input not responding smoothly

What to check

  • Read and record freeze frame and pending codes with scan tool
  • Inspect TPS connector and wiring for corrosion, damage, or disconnection
  • Measure battery voltage and charging system health
  • Backprobe TPS connector to verify reference (5V) present with ignition ON
  • Check TPS signal voltage at closed throttle and during throttle movement
  • Check ground continuity from TPS ground to chassis/ECM ground

Signal parameters

  • Reference (5V) supply to TPS: typically about 5.0 V (acceptable ~4.5–5.5 V depending on manufacturer spec)
  • TPS signal voltage at closed throttle: typically ~0.2–1.0 V
  • TPS signal voltage at wide open throttle: typically ~4.0–4.8 V
  • Signal should change smoothly and monotonically with throttle opening (no jumps or drops)

Diagnostic algorithm

  1. Connect a scan tool, record code(s), and note freeze-frame data.
  2. Visually inspect TPS connector and wiring for corrosion, bent pins, damage, or water intrusion; repair as needed.
  3. Verify battery voltage and charging system; repair low voltage issues first.
  4. With ignition ON (engine OFF), backprobe TPS connector: verify reference wire has ~5 V. If no 5V, trace to ECM and check for short to ground or open.
  5. If 5V present, measure TPS signal voltage at closed throttle — should be ~0.2–1.0 V. Slowly open throttle and watch for smooth increase to ~4.0–4.8 V. If erratic, suspect TPS.
  6. If reference is missing or incorrect, check continuity between reference wire and ECM pin; repair short/open. If continuity good and no wiring fault, suspect ECM reference circuitry failure.
  7. If wiring and reference OK but signal out of range or inconsistent, replace TPS and retest.
  8. After repairs, clear codes, perform relearn procedures if required by manufacturer, and road test to confirm repair and code not recurring.

Likely causes

  • Damaged or corroded TPS connector or pins
  • Short to ground or short to battery on the 5V reference wire
  • Failed TPS sensor
  • Poor ground or low battery/charging voltage causing false readings

Fault status

⚠️ Status
ECM detected the throttle position sensor reference voltage out of range or absent. Code P1219 stored when the expected reference voltage to the TPS is not within specification, indicating a possible wiring, connector, sensor, or ECM issue.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5 - 2.0 hours

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Code

P1219

GMC P — Powertrain

Throttle Position Sensor Reference Voltage

Brand: GMC
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or short in TPS reference (5V) wiring
  • Corroded, loose, or damaged TPS connector pins
  • Failed TPS (internal short/opens)
  • Faulty ECM voltage reference or internal ECM fault
  • Low battery voltage or poor battery/charging system condition
  • Aftermarket equipment or repairs that damaged wiring

Symptoms

  • Check Engine Light (MIL) on
  • Poor or erratic throttle response, hesitation, or surging
  • Reduced engine power or limp-in mode
  • Hard starting or stalling at idle
  • Inconsistent idle speed
  • Possible lack of speed/power with accelerator pedal input not responding smoothly

What to check

  • Read and record freeze frame and pending codes with scan tool
  • Inspect TPS connector and wiring for corrosion, damage, or disconnection
  • Measure battery voltage and charging system health
  • Backprobe TPS connector to verify reference (5V) present with ignition ON
  • Check TPS signal voltage at closed throttle and during throttle movement
  • Check ground continuity from TPS ground to chassis/ECM ground

Signal parameters

  • Reference (5V) supply to TPS: typically about 5.0 V (acceptable ~4.5–5.5 V depending on manufacturer spec)
  • TPS signal voltage at closed throttle: typically ~0.2–1.0 V
  • TPS signal voltage at wide open throttle: typically ~4.0–4.8 V
  • Signal should change smoothly and monotonically with throttle opening (no jumps or drops)

Diagnostic algorithm

  1. Connect a scan tool, record code(s), and note freeze-frame data.
  2. Visually inspect TPS connector and wiring for corrosion, bent pins, damage, or water intrusion; repair as needed.
  3. Verify battery voltage and charging system; repair low voltage issues first.
  4. With ignition ON (engine OFF), backprobe TPS connector: verify reference wire has ~5 V. If no 5V, trace to ECM and check for short to ground or open.
  5. If 5V present, measure TPS signal voltage at closed throttle — should be ~0.2–1.0 V. Slowly open throttle and watch for smooth increase to ~4.0–4.8 V. If erratic, suspect TPS.
  6. If reference is missing or incorrect, check continuity between reference wire and ECM pin; repair short/open. If continuity good and no wiring fault, suspect ECM reference circuitry failure.
  7. If wiring and reference OK but signal out of range or inconsistent, replace TPS and retest.
  8. After repairs, clear codes, perform relearn procedures if required by manufacturer, and road test to confirm repair and code not recurring.

Likely causes

  • Damaged or corroded TPS connector or pins
  • Short to ground or short to battery on the 5V reference wire
  • Failed TPS sensor
  • Poor ground or low battery/charging voltage causing false readings

Fault status

⚠️ Status
ECM detected the throttle position sensor reference voltage out of range or absent. Code P1219 stored when the expected reference voltage to the TPS is not within specification, indicating a possible wiring, connector, sensor, or ECM issue.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5 - 2.0 hours

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Code

P1219

HUMMER P — Powertrain

Throttle Position Sensor Reference Voltage

Brand: HUMMER
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or short in TPS reference (5V) wiring
  • Corroded, loose, or damaged TPS connector pins
  • Failed TPS (internal short/opens)
  • Faulty ECM voltage reference or internal ECM fault
  • Low battery voltage or poor battery/charging system condition
  • Aftermarket equipment or repairs that damaged wiring

Symptoms

  • Check Engine Light (MIL) on
  • Poor or erratic throttle response, hesitation, or surging
  • Reduced engine power or limp-in mode
  • Hard starting or stalling at idle
  • Inconsistent idle speed
  • Possible lack of speed/power with accelerator pedal input not responding smoothly

What to check

  • Read and record freeze frame and pending codes with scan tool
  • Inspect TPS connector and wiring for corrosion, damage, or disconnection
  • Measure battery voltage and charging system health
  • Backprobe TPS connector to verify reference (5V) present with ignition ON
  • Check TPS signal voltage at closed throttle and during throttle movement
  • Check ground continuity from TPS ground to chassis/ECM ground

Signal parameters

  • Reference (5V) supply to TPS: typically about 5.0 V (acceptable ~4.5–5.5 V depending on manufacturer spec)
  • TPS signal voltage at closed throttle: typically ~0.2–1.0 V
  • TPS signal voltage at wide open throttle: typically ~4.0–4.8 V
  • Signal should change smoothly and monotonically with throttle opening (no jumps or drops)

Diagnostic algorithm

  1. Connect a scan tool, record code(s), and note freeze-frame data.
  2. Visually inspect TPS connector and wiring for corrosion, bent pins, damage, or water intrusion; repair as needed.
  3. Verify battery voltage and charging system; repair low voltage issues first.
  4. With ignition ON (engine OFF), backprobe TPS connector: verify reference wire has ~5 V. If no 5V, trace to ECM and check for short to ground or open.
  5. If 5V present, measure TPS signal voltage at closed throttle — should be ~0.2–1.0 V. Slowly open throttle and watch for smooth increase to ~4.0–4.8 V. If erratic, suspect TPS.
  6. If reference is missing or incorrect, check continuity between reference wire and ECM pin; repair short/open. If continuity good and no wiring fault, suspect ECM reference circuitry failure.
  7. If wiring and reference OK but signal out of range or inconsistent, replace TPS and retest.
  8. After repairs, clear codes, perform relearn procedures if required by manufacturer, and road test to confirm repair and code not recurring.

Likely causes

  • Damaged or corroded TPS connector or pins
  • Short to ground or short to battery on the 5V reference wire
  • Failed TPS sensor
  • Poor ground or low battery/charging voltage causing false readings

Fault status

⚠️ Status
ECM detected the throttle position sensor reference voltage out of range or absent. Code P1219 stored when the expected reference voltage to the TPS is not within specification, indicating a possible wiring, connector, sensor, or ECM issue.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5 - 2.0 hours

Similar codes

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.

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Code

P1219

LINCOLN P — Powertrain

CID Low

Brand: LINCOLN
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or short in TPS reference (5V) wiring
  • Corroded, loose, or damaged TPS connector pins
  • Failed TPS (internal short/opens)
  • Faulty ECM voltage reference or internal ECM fault
  • Low battery voltage or poor battery/charging system condition
  • Aftermarket equipment or repairs that damaged wiring

Symptoms

  • Check Engine Light (MIL) on
  • Poor or erratic throttle response, hesitation, or surging
  • Reduced engine power or limp-in mode
  • Hard starting or stalling at idle
  • Inconsistent idle speed
  • Possible lack of speed/power with accelerator pedal input not responding smoothly

What to check

  • Read and record freeze frame and pending codes with scan tool
  • Inspect TPS connector and wiring for corrosion, damage, or disconnection
  • Measure battery voltage and charging system health
  • Backprobe TPS connector to verify reference (5V) present with ignition ON
  • Check TPS signal voltage at closed throttle and during throttle movement
  • Check ground continuity from TPS ground to chassis/ECM ground

Signal parameters

  • Reference (5V) supply to TPS: typically about 5.0 V (acceptable ~4.5–5.5 V depending on manufacturer spec)
  • TPS signal voltage at closed throttle: typically ~0.2–1.0 V
  • TPS signal voltage at wide open throttle: typically ~4.0–4.8 V
  • Signal should change smoothly and monotonically with throttle opening (no jumps or drops)

Diagnostic algorithm

  1. Connect a scan tool, record code(s), and note freeze-frame data.
  2. Visually inspect TPS connector and wiring for corrosion, bent pins, damage, or water intrusion; repair as needed.
  3. Verify battery voltage and charging system; repair low voltage issues first.
  4. With ignition ON (engine OFF), backprobe TPS connector: verify reference wire has ~5 V. If no 5V, trace to ECM and check for short to ground or open.
  5. If 5V present, measure TPS signal voltage at closed throttle — should be ~0.2–1.0 V. Slowly open throttle and watch for smooth increase to ~4.0–4.8 V. If erratic, suspect TPS.
  6. If reference is missing or incorrect, check continuity between reference wire and ECM pin; repair short/open. If continuity good and no wiring fault, suspect ECM reference circuitry failure.
  7. If wiring and reference OK but signal out of range or inconsistent, replace TPS and retest.
  8. After repairs, clear codes, perform relearn procedures if required by manufacturer, and road test to confirm repair and code not recurring.

Likely causes

  • Damaged or corroded TPS connector or pins
  • Short to ground or short to battery on the 5V reference wire
  • Failed TPS sensor
  • Poor ground or low battery/charging voltage causing false readings

Fault status

⚠️ Status
ECM detected the throttle position sensor reference voltage out of range or absent. Code P1219 stored when the expected reference voltage to the TPS is not within specification, indicating a possible wiring, connector, sensor, or ECM issue.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5 - 2.0 hours

Similar codes

166

Browse 166 LINCOLN manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

LINCOLN

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Code

P1219

MERCURY P — Powertrain

CID Low

Brand: MERCURY
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or short in TPS reference (5V) wiring
  • Corroded, loose, or damaged TPS connector pins
  • Failed TPS (internal short/opens)
  • Faulty ECM voltage reference or internal ECM fault
  • Low battery voltage or poor battery/charging system condition
  • Aftermarket equipment or repairs that damaged wiring

Symptoms

  • Check Engine Light (MIL) on
  • Poor or erratic throttle response, hesitation, or surging
  • Reduced engine power or limp-in mode
  • Hard starting or stalling at idle
  • Inconsistent idle speed
  • Possible lack of speed/power with accelerator pedal input not responding smoothly

What to check

  • Read and record freeze frame and pending codes with scan tool
  • Inspect TPS connector and wiring for corrosion, damage, or disconnection
  • Measure battery voltage and charging system health
  • Backprobe TPS connector to verify reference (5V) present with ignition ON
  • Check TPS signal voltage at closed throttle and during throttle movement
  • Check ground continuity from TPS ground to chassis/ECM ground

Signal parameters

  • Reference (5V) supply to TPS: typically about 5.0 V (acceptable ~4.5–5.5 V depending on manufacturer spec)
  • TPS signal voltage at closed throttle: typically ~0.2–1.0 V
  • TPS signal voltage at wide open throttle: typically ~4.0–4.8 V
  • Signal should change smoothly and monotonically with throttle opening (no jumps or drops)

Diagnostic algorithm

  1. Connect a scan tool, record code(s), and note freeze-frame data.
  2. Visually inspect TPS connector and wiring for corrosion, bent pins, damage, or water intrusion; repair as needed.
  3. Verify battery voltage and charging system; repair low voltage issues first.
  4. With ignition ON (engine OFF), backprobe TPS connector: verify reference wire has ~5 V. If no 5V, trace to ECM and check for short to ground or open.
  5. If 5V present, measure TPS signal voltage at closed throttle — should be ~0.2–1.0 V. Slowly open throttle and watch for smooth increase to ~4.0–4.8 V. If erratic, suspect TPS.
  6. If reference is missing or incorrect, check continuity between reference wire and ECM pin; repair short/open. If continuity good and no wiring fault, suspect ECM reference circuitry failure.
  7. If wiring and reference OK but signal out of range or inconsistent, replace TPS and retest.
  8. After repairs, clear codes, perform relearn procedures if required by manufacturer, and road test to confirm repair and code not recurring.

Likely causes

  • Damaged or corroded TPS connector or pins
  • Short to ground or short to battery on the 5V reference wire
  • Failed TPS sensor
  • Poor ground or low battery/charging voltage causing false readings

Fault status

⚠️ Status
ECM detected the throttle position sensor reference voltage out of range or absent. Code P1219 stored when the expected reference voltage to the TPS is not within specification, indicating a possible wiring, connector, sensor, or ECM issue.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5 - 2.0 hours

Similar codes

296

Browse 296 MERCURY manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

MERCURY

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Code

P1219

OLDSMOBILE P — Powertrain

Throttle Position Sensor Reference Voltage

AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or short in TPS reference (5V) wiring
  • Corroded, loose, or damaged TPS connector pins
  • Failed TPS (internal short/opens)
  • Faulty ECM voltage reference or internal ECM fault
  • Low battery voltage or poor battery/charging system condition
  • Aftermarket equipment or repairs that damaged wiring

Symptoms

  • Check Engine Light (MIL) on
  • Poor or erratic throttle response, hesitation, or surging
  • Reduced engine power or limp-in mode
  • Hard starting or stalling at idle
  • Inconsistent idle speed
  • Possible lack of speed/power with accelerator pedal input not responding smoothly

What to check

  • Read and record freeze frame and pending codes with scan tool
  • Inspect TPS connector and wiring for corrosion, damage, or disconnection
  • Measure battery voltage and charging system health
  • Backprobe TPS connector to verify reference (5V) present with ignition ON
  • Check TPS signal voltage at closed throttle and during throttle movement
  • Check ground continuity from TPS ground to chassis/ECM ground

Signal parameters

  • Reference (5V) supply to TPS: typically about 5.0 V (acceptable ~4.5–5.5 V depending on manufacturer spec)
  • TPS signal voltage at closed throttle: typically ~0.2–1.0 V
  • TPS signal voltage at wide open throttle: typically ~4.0–4.8 V
  • Signal should change smoothly and monotonically with throttle opening (no jumps or drops)

Diagnostic algorithm

  1. Connect a scan tool, record code(s), and note freeze-frame data.
  2. Visually inspect TPS connector and wiring for corrosion, bent pins, damage, or water intrusion; repair as needed.
  3. Verify battery voltage and charging system; repair low voltage issues first.
  4. With ignition ON (engine OFF), backprobe TPS connector: verify reference wire has ~5 V. If no 5V, trace to ECM and check for short to ground or open.
  5. If 5V present, measure TPS signal voltage at closed throttle — should be ~0.2–1.0 V. Slowly open throttle and watch for smooth increase to ~4.0–4.8 V. If erratic, suspect TPS.
  6. If reference is missing or incorrect, check continuity between reference wire and ECM pin; repair short/open. If continuity good and no wiring fault, suspect ECM reference circuitry failure.
  7. If wiring and reference OK but signal out of range or inconsistent, replace TPS and retest.
  8. After repairs, clear codes, perform relearn procedures if required by manufacturer, and road test to confirm repair and code not recurring.

Likely causes

  • Damaged or corroded TPS connector or pins
  • Short to ground or short to battery on the 5V reference wire
  • Failed TPS sensor
  • Poor ground or low battery/charging voltage causing false readings

Fault status

⚠️ Status
ECM detected the throttle position sensor reference voltage out of range or absent. Code P1219 stored when the expected reference voltage to the TPS is not within specification, indicating a possible wiring, connector, sensor, or ECM issue.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5 - 2.0 hours

Similar codes

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Code

P1219

Other P — Powertrain

CID Low

Brand: Other
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or short in TPS reference (5V) wiring
  • Corroded, loose, or damaged TPS connector pins
  • Failed TPS (internal short/opens)
  • Faulty ECM voltage reference or internal ECM fault
  • Low battery voltage or poor battery/charging system condition
  • Aftermarket equipment or repairs that damaged wiring

Symptoms

  • Check Engine Light (MIL) on
  • Poor or erratic throttle response, hesitation, or surging
  • Reduced engine power or limp-in mode
  • Hard starting or stalling at idle
  • Inconsistent idle speed
  • Possible lack of speed/power with accelerator pedal input not responding smoothly

What to check

  • Read and record freeze frame and pending codes with scan tool
  • Inspect TPS connector and wiring for corrosion, damage, or disconnection
  • Measure battery voltage and charging system health
  • Backprobe TPS connector to verify reference (5V) present with ignition ON
  • Check TPS signal voltage at closed throttle and during throttle movement
  • Check ground continuity from TPS ground to chassis/ECM ground

Signal parameters

  • Reference (5V) supply to TPS: typically about 5.0 V (acceptable ~4.5–5.5 V depending on manufacturer spec)
  • TPS signal voltage at closed throttle: typically ~0.2–1.0 V
  • TPS signal voltage at wide open throttle: typically ~4.0–4.8 V
  • Signal should change smoothly and monotonically with throttle opening (no jumps or drops)

Diagnostic algorithm

  1. Connect a scan tool, record code(s), and note freeze-frame data.
  2. Visually inspect TPS connector and wiring for corrosion, bent pins, damage, or water intrusion; repair as needed.
  3. Verify battery voltage and charging system; repair low voltage issues first.
  4. With ignition ON (engine OFF), backprobe TPS connector: verify reference wire has ~5 V. If no 5V, trace to ECM and check for short to ground or open.
  5. If 5V present, measure TPS signal voltage at closed throttle — should be ~0.2–1.0 V. Slowly open throttle and watch for smooth increase to ~4.0–4.8 V. If erratic, suspect TPS.
  6. If reference is missing or incorrect, check continuity between reference wire and ECM pin; repair short/open. If continuity good and no wiring fault, suspect ECM reference circuitry failure.
  7. If wiring and reference OK but signal out of range or inconsistent, replace TPS and retest.
  8. After repairs, clear codes, perform relearn procedures if required by manufacturer, and road test to confirm repair and code not recurring.

Likely causes

  • Damaged or corroded TPS connector or pins
  • Short to ground or short to battery on the 5V reference wire
  • Failed TPS sensor
  • Poor ground or low battery/charging voltage causing false readings

Fault status

⚠️ Status
ECM detected the throttle position sensor reference voltage out of range or absent. Code P1219 stored when the expected reference voltage to the TPS is not within specification, indicating a possible wiring, connector, sensor, or ECM issue.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5 - 2.0 hours

Similar codes

7,996

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Code

P1219

SATURN P — Powertrain

Throttle Position Sensor Refernce Voltage

Brand: SATURN
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or short in TPS reference (5V) wiring
  • Corroded, loose, or damaged TPS connector pins
  • Failed TPS (internal short/opens)
  • Faulty ECM voltage reference or internal ECM fault
  • Low battery voltage or poor battery/charging system condition
  • Aftermarket equipment or repairs that damaged wiring

Symptoms

  • Check Engine Light (MIL) on
  • Poor or erratic throttle response, hesitation, or surging
  • Reduced engine power or limp-in mode
  • Hard starting or stalling at idle
  • Inconsistent idle speed
  • Possible lack of speed/power with accelerator pedal input not responding smoothly

What to check

  • Read and record freeze frame and pending codes with scan tool
  • Inspect TPS connector and wiring for corrosion, damage, or disconnection
  • Measure battery voltage and charging system health
  • Backprobe TPS connector to verify reference (5V) present with ignition ON
  • Check TPS signal voltage at closed throttle and during throttle movement
  • Check ground continuity from TPS ground to chassis/ECM ground

Signal parameters

  • Reference (5V) supply to TPS: typically about 5.0 V (acceptable ~4.5–5.5 V depending on manufacturer spec)
  • TPS signal voltage at closed throttle: typically ~0.2–1.0 V
  • TPS signal voltage at wide open throttle: typically ~4.0–4.8 V
  • Signal should change smoothly and monotonically with throttle opening (no jumps or drops)

Diagnostic algorithm

  1. Connect a scan tool, record code(s), and note freeze-frame data.
  2. Visually inspect TPS connector and wiring for corrosion, bent pins, damage, or water intrusion; repair as needed.
  3. Verify battery voltage and charging system; repair low voltage issues first.
  4. With ignition ON (engine OFF), backprobe TPS connector: verify reference wire has ~5 V. If no 5V, trace to ECM and check for short to ground or open.
  5. If 5V present, measure TPS signal voltage at closed throttle — should be ~0.2–1.0 V. Slowly open throttle and watch for smooth increase to ~4.0–4.8 V. If erratic, suspect TPS.
  6. If reference is missing or incorrect, check continuity between reference wire and ECM pin; repair short/open. If continuity good and no wiring fault, suspect ECM reference circuitry failure.
  7. If wiring and reference OK but signal out of range or inconsistent, replace TPS and retest.
  8. After repairs, clear codes, perform relearn procedures if required by manufacturer, and road test to confirm repair and code not recurring.

Likely causes

  • Damaged or corroded TPS connector or pins
  • Short to ground or short to battery on the 5V reference wire
  • Failed TPS sensor
  • Poor ground or low battery/charging voltage causing false readings

Fault status

⚠️ Status
ECM detected the throttle position sensor reference voltage out of range or absent. Code P1219 stored when the expected reference voltage to the TPS is not within specification, indicating a possible wiring, connector, sensor, or ECM issue.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5 - 2.0 hours

Similar codes

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Code

P1219

VOLKSWAGEN P — Powertrain

Cylinder 7 Fuel Injector Circuit Short To B+

AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or short in TPS reference (5V) wiring
  • Corroded, loose, or damaged TPS connector pins
  • Failed TPS (internal short/opens)
  • Faulty ECM voltage reference or internal ECM fault
  • Low battery voltage or poor battery/charging system condition
  • Aftermarket equipment or repairs that damaged wiring

Symptoms

  • Check Engine Light (MIL) on
  • Poor or erratic throttle response, hesitation, or surging
  • Reduced engine power or limp-in mode
  • Hard starting or stalling at idle
  • Inconsistent idle speed
  • Possible lack of speed/power with accelerator pedal input not responding smoothly

What to check

  • Read and record freeze frame and pending codes with scan tool
  • Inspect TPS connector and wiring for corrosion, damage, or disconnection
  • Measure battery voltage and charging system health
  • Backprobe TPS connector to verify reference (5V) present with ignition ON
  • Check TPS signal voltage at closed throttle and during throttle movement
  • Check ground continuity from TPS ground to chassis/ECM ground

Signal parameters

  • Reference (5V) supply to TPS: typically about 5.0 V (acceptable ~4.5–5.5 V depending on manufacturer spec)
  • TPS signal voltage at closed throttle: typically ~0.2–1.0 V
  • TPS signal voltage at wide open throttle: typically ~4.0–4.8 V
  • Signal should change smoothly and monotonically with throttle opening (no jumps or drops)

Diagnostic algorithm

  1. Connect a scan tool, record code(s), and note freeze-frame data.
  2. Visually inspect TPS connector and wiring for corrosion, bent pins, damage, or water intrusion; repair as needed.
  3. Verify battery voltage and charging system; repair low voltage issues first.
  4. With ignition ON (engine OFF), backprobe TPS connector: verify reference wire has ~5 V. If no 5V, trace to ECM and check for short to ground or open.
  5. If 5V present, measure TPS signal voltage at closed throttle — should be ~0.2–1.0 V. Slowly open throttle and watch for smooth increase to ~4.0–4.8 V. If erratic, suspect TPS.
  6. If reference is missing or incorrect, check continuity between reference wire and ECM pin; repair short/open. If continuity good and no wiring fault, suspect ECM reference circuitry failure.
  7. If wiring and reference OK but signal out of range or inconsistent, replace TPS and retest.
  8. After repairs, clear codes, perform relearn procedures if required by manufacturer, and road test to confirm repair and code not recurring.

Likely causes

  • Damaged or corroded TPS connector or pins
  • Short to ground or short to battery on the 5V reference wire
  • Failed TPS sensor
  • Poor ground or low battery/charging voltage causing false readings

Fault status

⚠️ Status
ECM detected the throttle position sensor reference voltage out of range or absent. Code P1219 stored when the expected reference voltage to the TPS is not within specification, indicating a possible wiring, connector, sensor, or ECM issue.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5 - 2.0 hours

Similar codes

139

Browse 139 VOLKSWAGEN manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

VOLKSWAGEN

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