U1130 — SCP (J1850) Invalid or Missing Data for Fuel System

OBD2 code U1130 flags a problem with the fuel delivery and mixture control (SCP (J1850) invalid or missing data for fuel system). Short, gentle driving to a shop is usually possible. Common culprits: vacuum or intake leaks skewing the mixture, contaminated or incorrect fuel, weak fuel pump or clogged fuel filter.

vehicle network

Is it safe to drive?

Drive with caution Drive with caution. Mixture and fuel-pressure faults can cause stalling, hesitation in traffic and — when severe — catalyst damage. Avoid long trips until diagnosed.

How to diagnose with an OBD scanner

Read the code and freeze frame Connect an OBD2 scanner, confirm U1130 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
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.
Inspect wiring and connectors Visually inspect the wiring harness and connectors related to the fuel delivery and mixture control for damage, corrosion, chafing or poor contact.
Subsystem check Measure fuel pressure at the rail and compare with factory specification at idle and under load.
Subsystem check Check short-term and long-term fuel trims in live data to see which way the mixture is off.
Verify the repair Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm U1130 does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for U1130 (parts and labor, USD, independent shop rates): Replace the fuel filter: $80–$200; Replace the fuel pump: $400–$900; Clean or replace injectors: $200–$800; Replace the pressure regulator or sensor: $150–$450. Overall, fixing U1130 usually costs between $80 and $900. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Common questions

Is it safe to drive with U1130?

Drive with caution. Mixture and fuel-pressure faults can cause stalling, hesitation in traffic and — when severe — catalyst damage. Avoid long trips until diagnosed.

Will U1130 clear itself?

Sometimes U1130 clears after a few drive cycles if the fault was intermittent — for example a loose connector or a tank of bad fuel. The underlying cause usually remains, so the code tends to return. Clear it once; if it comes back, diagnose rather than erase it repeatedly.

How do I diagnose U1130 myself?

Start with a scan: confirm U1130, save the freeze frame and note any companion codes. Then inspect the wiring and connectors related to the fuel delivery and mixture control, and verify the suspect component against live data before buying parts.

What does OBD2 code U1130 mean?

What are the symptoms of U1130?

Drivers most often notice: rough idle and hesitation, Check Engine Light on, increased fuel consumption, fuel smell in severe cases.

What does U1130 mean?

Seeing U1130 on your scanner? The control unit has caught the fuel delivery and mixture control operating outside its calibrated window. The formal description is “SCP (J1850) Invalid or Missing Data for Fuel System”, and the code is grouped under vehicle network faults.

The module monitors this system continuously while driving. When readings fall outside the expected range for a defined number of drive cycles, it stores U1130 and switches on the warning light. Freeze frame data saved with the code shows the exact conditions — rpm, load, temperature, speed — at the moment the fault was detected, which is the best starting point for diagnosis.

What causes U1130?

vacuum or intake leaks skewing the mixture
faulty fuel pressure regulator
weak fuel pump or clogged fuel filter
faulty fuel rail pressure sensor or wiring
clogged or leaking fuel injectors

Common symptoms of U1130

rough idle and hesitation
Check Engine Light on
increased fuel consumption
fuel smell in severe cases
loss of power under load
hard starting or long cranking

How to diagnose U1130

Connect an OBD2 scanner, confirm U1130 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
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.
Visually inspect the wiring harness and connectors related to the fuel delivery and mixture control for damage, corrosion, chafing or poor contact.
Measure fuel pressure at the rail and compare with factory specification at idle and under load.
Check short-term and long-term fuel trims in live data to see which way the mixture is off.
Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm U1130 does not return.

How to fix U1130

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

Replace the fuel filter — $80–$200
Replace the fuel pump — $400–$900
Clean or replace injectors — $200–$800
Replace the pressure regulator or sensor — $150–$450

How much does it cost to fix U1130?

Repair cost depends on which component actually failed. Typical scenarios for U1130 (parts and labor, USD, independent shop rates):

Replace the fuel filter: $80–$200
Replace the fuel pump: $400–$900
Clean or replace injectors: $200–$800
Replace the pressure regulator or sensor: $150–$450

Overall, fixing U1130 usually costs between $80 and $900. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Can you drive with U1130?