What Does P1141 Mean?
This code indicates a malfunction in the fuel restriction indicator circuit. This circuit monitors a sensor or switch that detects when the fuel filter is becoming clogged or fuel flow is restricted. The ECM has detected an electrical fault in this monitoring circuit, which could be an open, short, or out-of-range signal. This is distinct from an actual fuel restriction condition; it specifically indicates the warning circuit itself has failed.
Common Causes
30%
Faulty fuel restriction indicator sensor or switch
25%
Open or shorted wiring in the fuel restriction indicator circuit
20%
Corroded connector at the fuel restriction sensor
15%
Actually clogged fuel filter triggering the indicator at its electrical limit
10%
ECM internal circuit fault for the fuel restriction monitor input
Diagnostic Steps
1
Locate the fuel restriction indicator sensor (typically on or near the fuel filter housing) and inspect the connector for corrosion or damage.
2
Check the wiring from the sensor to the ECM for continuity and check for shorts to ground or power.
3
Measure the sensor output voltage or resistance and compare to manufacturer specifications.
4
If a serviceable fuel filter is present, replace it to rule out an actual restriction condition triggering the sensor.
5
If the sensor and wiring test good, check for ECM input circuit failure by monitoring the PID with a scan tool while manipulating the connector.
Estimated Repair Cost
$50 - $300
Parts + labor, varies by vehicle and location
This code indicates a malfunction in the fuel restriction indicator circuit. This circuit monitors a sensor or switch that detects when the fuel filter is becoming clogged or fuel flow is restricted. The ECM has detected an electrical fault in this monitoring circuit, which could be an open, short, ...
The most common cause of P1141 (Fuel Restriction Indicator Circuit Malfunction) is: Faulty fuel restriction indicator sensor or switch
Typical repair costs for P1141 range from $50 to $300, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Low safety risk. If the circuit has failed, you lose the ability to monitor for a clogged fuel filter. An undetected fuel restriction could eventually cause stalling or loss of power at highway speeds.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1141 to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel System
Difficulty
Type
Manufacturer
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