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So my Cat threw a code P018D so I took it in and was told it's a stored code and they cleared it, 1 week later it's back so now I have a appointment to take it back. Anyone else throw this code? It's fuel injector sensor I think
 

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Only codes I've thrown is when I pulled the active exhaust fuse. P018D is 'Fuel Pressure Sensor Circuit High Voltage'. Wish I had more info.. I can't remember if the Diagnostics page in the DID only displays active codes, or if it displays stored/historical codes too. Try disconnecting your battery and see if the code is still there. If it isn't it was stored..

Probably still worth a trip to the dealer regardless.
 

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So my Cat threw a code P018D so I took it in and was told it's a stored code and they cleared it, 1 week later it's back so now I have a appointment to take it back. Anyone else throw this code? It's fuel injector sensor I think
Mine had same exact problem at delivery. The car will only run moderate while sensor is bad but drivable. Once they replaced it it was like the hounds of hell were let loose and hold on for dear life. Big difference once replaced. My tech only took him 45 minutes to replace and did not have to remove anything to get to it.
 

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P018D-FUEL PRESSURE SENSOR CIRCUIT HIGH

Theory of Operation
The Powertrain Control Module (PCM) provides a 5-Volt supply to the Fuel Rail Pressure Sensor (FRPS). The PCM also provides a ground on the sensor return circuit. The Fuel Rail Pressure Sensor provides a signal to the PCM on the Fuel Rail Pressure Sensor Signal circuit. This sensor signal voltage changes based on the pressure in the fuel rail. The PCM will detect a low signal voltage at low rail pressures. The PCM will detect a high signal voltage during high rail pressure conditions.


When Monitored and Set Conditions
When Monitored: This diagnostic runs continuously when the following conditions are met:
  • With the ignition on.
  • Battery voltage greater than 10.4 volts.


Set Conditions:

  • The Fuel Rail Pressure Sensor (FRPS) signal circuit voltage is above a calibrated threshold for a certain period of time.


Default Actions:
  • The MIL light will illuminate.



Possible Causes
FRPS SIGNAL CIRCUIT SHORTED TO VOLTAGE
FRPS SIGNAL CIRCUIT OPEN/HIGH RESISTANCE
FRPS SIGNAL CIRCUIT SHORTED TO THE 5-VOLT SUPPLY CIRCUIT
SENSOR GROUND OPEN/HIGH RESISTANCE
FUEL RAIL PRESSURE SENSOR <<< most likely cause
POWERTRAIN CONTROL MODULE (PCM)
 

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Mine has been on the battery tender since Dec. Started it up yesterday to lube things up and I have a check engine light now? I did have the fuel pump fuse out so I could spin the motor once and a while. (was later told to just floor the gas and it wouldn't start) You guys have scanners to check codes or is there a function on the car?
 

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scroll thru to diagnostic then hit ok and it will search for code and display if found
Thanks found it U0109 Lost communication to fuel pump. Logical since I pulled fuse over winter. Assume I just disconnect battery to reset?
 

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I am getting the u0109 engine code. I didn’t mess with any fuses. I took it to the dealer didn’t see anything wrong cleared it came back today. Has anyone had experience with this code ?




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Is it safe to drive on P018D ? And will the code clear ? Or is it something serious wrong ?
 

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I am getting the u0109 engine code. I didn’t mess with any fuses. I took it to the dealer didn’t see anything wrong cleared it came back today. Has anyone had experience with this code ?




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No experience.

Here's a link to some info about the code and what it might mean.

U0109 Lost Communication with Fuel Pump Control Module (FPCM)

Generally if the engine is not manifesting any untoward behavior and if the CEL is not flashing the SOP is to clear the code and see if it comes back.

There is a lot of CAN bus message traffic -- I have a tool that can capture this and it can get/capture hundreds of messages per second. At 500,000 bits per second that's approx. 50,000 bytes per second and at IIRC 8 bytes per CAN message that's around 6250 message per second. Allowing for some time between the messages can still have hundreds of message flying by per second.

So one "lost" or "dropped" message may not be that big of a deal.
 

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Is it safe to drive on P018D ? And will the code clear ? Or is it something serious wrong ?
No experience but here's a link with more info:

P018D Fuel Pressure Sensor B Circuit High

My advice is to take the car to a qualified service/repair facility -- aka a dealer service department -- and get a professional tech's opinion as to what you should do next.

Now as I mentioned in another post in this thread as long as the engine is not manifesting untoward behavior (and other factors are considered, for instance what does the factory OBD2 diagnostic manual have to say on this matter) he might just advise you the code be cleared and that you then road test the car. If the CEL comes back on with the same error code then the cause needs looking into.

However, I'm not an auto tech so I'm not qualified to advise you if it is ok to drive the car.

Generally error codes will clear on their own. It takes a number of warm up cycles with the error condition no longer present. How many depends upon the error code. Just a few for some but more for others. My limited experience is ones regarding inefficient converter operation can take a good number of warm up cycles before these are cleared and the CEL goes dark. However, I seldom let the code clear on its own. I prefer to read the code and make a diagnosis and either clear the code myself then road test the car or in other cases turn this over to a professional auto tech.
 
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