P203E

Reductant Level Sensor Circuit Intermittent/Erratic

DTC P203E, sometimes indicated as P203E00 is an OBD diagnostic trouble code indicating a manufacturer-specific fault with the vehicle powertrain (i.e. engine and gearbox). This code identifies an error with the air/fuel mixture causing reductant level sensor circuit intermittent/erratic.

This code is caused by a problem with the reductant level sensor circuit. The most common cause is a bad sensor, but there can also be wiring or connector problems.
To fix this code, first check the wiring and connectors for damage or corrosion. If everything looks good, then replace the reductant level sensor.

  • P203E: Reductant Level Sensor Circuit Intermittent/Erratic
  • P203E: Reductant level sensor – circuit intermittent/erratic
  • P203E 00: Reductant level sensor - circuit intermittent/erratic

DTC Trouble Code Search
Bulletins

Bulletins are notices put out by manufacturers in conjunction with the NHTSA to notify the public of manufacturing issues or changes.

  • S2025000001 - EXTERIOR LIGHTING
    JEEP: Malfunction indicator lamp illumination (mil). Diagnostic trouble code (dtc) P203E ? Reductant level sensor 1 circuit intermittent-erratic set.
  • 1400323 - ELECTRICAL SYSTEM
    CHRYSLER: Diesel exhaust fluid (def) fluid freezing customers may experience a malfunction indicator lamp (mil) illumination. Upon further investigation the technician may find the following diagnostic trouble code (dtc) has been set: ? P203E-00 - r
  • S2025000001 - EXTERIOR LIGHTING
    JEEP: Malfunction indicator lamp illumination (mil). Diagnostic trouble code (dtc) P203E ? Reductant level sensor 1 circuit intermittent-erratic set.
  • S2025000001 - EXTERIOR LIGHTING
    JEEP: (rev. B) malfunction indicator lamp illumination (mil). Diagnostic trouble code (dtc) P203E ? Reductant level sensor 1 circuit intermittent-erratic set.
  • 52029737 - ENGINE AND ENGINE COOLING
    JEEP: Tank, diesel exhaust fluid, part includes temp sensor and level sensor for ds and wk vehicles only; if the urea tank is being replaced due to P249C, P203E, or P24F3 on a 2014-2016 model year 3.0l turbo diesel (exf) on ds or wk, please ca
  • 1803421 - ENGINE AND ENGINE COOLING
    RAM: P203E and P203F additional diagnostic information this bulletin provides additional information regarding diagnosing diesel exhaust fluid (def) issue in extreme cold weather. Diagnostic trouble codes (dtcs) P203E - reductant level sensor 1
  • 18-034-21 REV. A - BACK OVER PREVENTION
    RAM: P203E and P203F additional diagnostic information this bulletin provides additional information regarding diagnosing diesel exhaust fluid (def) issue in extreme cold weather. Diagnostic trouble codes (dtcs) P203E - reductant level sensor 1
  • 18-034-21 - BACK OVER PREVENTION
    RAM: P203E and P203F additional diagnostic information this bulletin provides additional information regarding diagnosing diesel exhaust fluid (def) issue in extreme cold weather. Diagnostic trouble codes (dtcs) P203E - reductant level sensor 1
  • S2025000001 Rev. - EQUIPMENT
    JEEP: (rev. B) malfunction indicator lamp illumination (mil). Diagnostic trouble code (dtc) P203E ? Reductant level sensor 1 circuit intermittent-erratic set.
  • S2025000001 Rev. - ELECTRICAL SYSTEM
    JEEP: (rev. B) malfunction indicator lamp illumination (mil). Diagnostic trouble code (dtc) P203E ? Reductant level sensor 1 circuit intermittent-erratic set.
  • S2025000001 Rev. - ELECTRICAL SYSTEM
    CHRYSLER: (revision a) malfunction indicator lamp illumination (mil). Diagnostic trouble code (dtc) P203E ? Reductant level sensor 1 circuit intermittent-erratic set.
  • S2025000001 - ELECTRICAL SYSTEM
    JEEP: Malfunction indicator lamp illumination (mil). Diagnostic trouble code (dtc) P203E ? Reductant level sensor 1 circuit intermittent-erratic set.
  • S2025000001 - ELECTRICAL SYSTEM
    JEEP: Malfunction indicator lamp illumination (mil). Diagnostic trouble code (dtc) P203E ? Reductant level sensor 1 circuit intermittent-erratic set.
  • S2025000001 - BACK OVER PREVENTION
    JEEP: Malfunction indicator lamp illumination (mil). Diagnostic trouble code (dtc) P203E ? Reductant level sensor 1 circuit intermittent-erratic set.
  • S1925000004 - ELECTRICAL SYSTEM
    RAM: Malfunction indicator lamp illumination (mil). Diagnostic trouble code (dtc) P203E ? Reductant level sensor 1 circuit intermittent-erratic set
  • 52029737A$ - ENGINE AND ENGINE COOLING:ENGINE:OTHER FUEL TYPES:TURBO/SUPERCHARGER
    JEEP: Tank, diesel exhaust fluid, part includes temp sensor and level sensor for ds and wk vehicles only; if the urea tank is being replaced due to P249C or P203E on a 2014-2016 model year 3.0l turbo diesel (exf) on ds or wk, please call indra
  • SSM 45920 - ELECTRICAL SYSTEM
    FORD: Some 2015-2016 f-super duty vehicles equipped with a 6.7l diesel engine may exhibit an illuminated mil with dtcs:P218F, P123E, P123F, P22A2, P2204, P207F, P204E, P2085, P204F, P202E, P130E, P203E and P205E which remain present after repairi
Consumer Complaints for this DTC



2015 RAM 1500 with 91000.0 miles

Am getting a P203E error message. Took it to dealer. There is a defective level sensor located inside the tank. Problem is its a sealed tank with no access only way to fix is to replace the entire tank, pump and sensor. Very bad design flaw. $2600 to replace. Message is saying engine will fail to start after 500 miles. The def pump is working correctly but the engine thinks its almost empty.
ENGINE, FUEL/PROPULSION SYSTEM



2015 BMW X3 with 81000 miles

I have a diesel that the scr tank that holds the diesel emission fluid has a faulty level sensor P203E error code. A. Check engine iight is always on. Bmw has extended warranty of 10 yr/120,000 miles. Several of the diesel Bmw have this tank aspart of the extended warranty but not mine. Light has been on for a year.
ENGINE,



2014 RAM 1500 with 136000. miles

2014 Ram 1500 laRamie ecodiesel throwing fault code P203E reductant level sensor circuit intermittent/erratic. This fault is caused by crystallized diesel exhuast fluid (def) on the integrated sensor in the def tank. The sensor is unable to detect the amount of fluid in tank and will shut down engine after 500 miles if the tank is not replaced. I do believe after extensive research this is a manufacturing defect. There are two different recalls for this fault which are: number: 18-038-15 rev. B and number: 25-001-15 rev a. The first one covers a pcm flash for the 2015 Ram and 2014 jeep grand cherokee. In the notes it says that this is for all 3 liter 8 speed transmissions. Which should also include a 2014 Ram ecodiesel. The second one if for 2014-15 Ram 2500,3500+ with 6.7l diesel engines. The issue i have with that is my vehicle is having that exact issue and needs the same services but it has a 3 liter engine.
UNKNOWN OR OTHER, ELECTRICAL SYSTEM

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