P1181
P1181 - Fuel Delivery System Malfunction - High
Possible causes
Fuel pressure regulator.
Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P1181 Description
The PCM receives fuel tank pressure (FTP) information from the natural gas (NG) module, which uses the information to infer the fuel rail pressure (FRP). The test fails when the inferred pressure is higher than a maximum calibrated value.
P1181 Information for specific makes
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