U1019 — SCP (J1850) Invalid or Missing Data for Throttle

U1019 — SCP (J1850) Invalid or Missing Data for Throttle. A fault in the throttle and intake air metering. Short, gentle driving to a shop is usually possible. Typical causes: intake air leaks after the MAF sensor, failed electronic throttle motor, wiring or connector faults in the throttle circuit.

vehicle network

Is it safe to drive?

Drive with caution Drive with caution. Many throttle faults put the car into limp mode with limited power — enough to reach a shop, not for highway trips. If the engine stalls or the pedal stops responding, do not drive.

How to diagnose with an OBD scanner

  1. Read the code and freeze frame Connect an OBD2 scanner, confirm U1019 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
  2. Check for companion codes and TSBs Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many U0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
  3. Inspect wiring and connectors Visually inspect the wiring harness and connectors related to the throttle and intake air metering for damage, corrosion, chafing or poor contact.
  4. Subsystem check Inspect and clean the throttle body; check that the plate moves freely.
  5. Subsystem check Watch throttle position and MAF/MAP readings in live data while pressing the pedal — values should change smoothly.
  6. Verify the repair Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm U1019 does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for U1019 (parts and labor, USD, independent shop rates): Clean the throttle body: $80–$200; Replace the MAF or MAP sensor: $150–$400; Replace the throttle body assembly: $250–$700. Overall, fixing U1019 usually costs between $80 and $700. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Common questions

How much does it cost to fix U1019?

Clean the throttle body — $80–$200; Replace the MAF or MAP sensor — $150–$400; Replace the throttle body assembly — $250–$700. Exact cost depends on the root cause, your vehicle and local labor rates — a proper diagnosis is the cheapest first step.

What does OBD2 code U1019 mean?

U1019 — SCP (J1850) Invalid or Missing Data for Throttle. A fault in the throttle and intake air metering. Short, gentle driving to a shop is usually possible. Typical causes: intake air leaks after the MAF sensor, failed electronic throttle motor, wiring or connector faults in the throttle circuit.

Is it safe to drive with U1019?

Drive with caution. Many throttle faults put the car into limp mode with limited power — enough to reach a shop, not for highway trips. If the engine stalls or the pedal stops responding, do not drive.

What are the symptoms of U1019?

Drivers most often notice: unstable or high idle, Check Engine Light on, stalling when coming to a stop, poor throttle response.

How do I diagnose U1019 myself?

Start with a scan: confirm U1019, save the freeze frame and note any companion codes. Then inspect the wiring and connectors related to the throttle and intake air metering, and verify the suspect component against live data before buying parts.

What does U1019 mean?

U1019 (SCP (J1850) Invalid or Missing Data for Throttle) is stored when self-diagnostics detect abnormal readings or behaviour of the throttle and intake air metering. It belongs to the vehicle network category.

This code does not appear from a single bad reading: the module must see the fault condition repeat under defined operating conditions before it turns on the warning light. The freeze frame captured with U1019 — engine load, rpm, temperature, speed — tells you exactly when the problem occurs, so reproduce those conditions when testing.

Common symptoms of U1019

  • unstable or high idle
  • Check Engine Light on
  • stalling when coming to a stop
  • poor throttle response
  • limp-home mode with reduced power

What causes U1019?

  • dirty throttle body or stuck throttle plate
  • faulty throttle position sensor or pedal sensor
  • wiring or connector faults in the throttle circuit
  • intake air leaks after the MAF sensor
  • contaminated or failed MAF/MAP sensor

How to diagnose U1019

  1. Connect an OBD2 scanner, confirm U1019 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
  2. Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many U0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
  3. Visually inspect the wiring harness and connectors related to the throttle and intake air metering for damage, corrosion, chafing or poor contact.
  4. Inspect and clean the throttle body; check that the plate moves freely.
  5. Watch throttle position and MAF/MAP readings in live data while pressing the pedal — values should change smoothly.
  6. Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm U1019 does not return.

How to fix U1019

Start with the cheapest and most common causes before replacing expensive parts:

  • Clean the throttle body — $80–$200
  • Replace the MAF or MAP sensor — $150–$400
  • Replace the throttle body assembly — $250–$700

How much does it cost to fix U1019?

Repair cost depends on which component actually failed. Typical scenarios for U1019 (parts and labor, USD, independent shop rates):

  • Clean the throttle body: $80–$200
  • Replace the MAF or MAP sensor: $150–$400
  • Replace the throttle body assembly: $250–$700

Overall, fixing U1019 usually costs between $80 and $700. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Can you drive with U1019?

Drive with caution. Many throttle faults put the car into limp mode with limited power — enough to reach a shop, not for highway trips. If the engine stalls or the pedal stops responding, do not drive.

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