P203E on 2014-2016 Jeep Grand Cherokee — Reductant Level Sensor Circuit Intermittent/Erratic
1 vehicles · 1 makes · $900-$2,500 repair
Most Reported On
P203E is an OBD-II diagnostic trouble code meaning “Reductant Level Sensor Circuit Intermittent/Erratic.” Set when the PCM detects an intermittent or erratic signal from the reductant (DEF) level sensor circuit — the reading fluctuates rather than being steadily out of range, often due to loose/corroded connections or a failing in-tank sensor. This code is most commonly reported on 2014-2016 Jeep Grand Cherokee, with repair costs ranging from $900 to $2,500.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose P203E, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
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- I/M readiness status
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BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
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- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
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Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
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- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
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FAQ
What does P203E mean?
P203E stands for "Reductant Level Sensor Circuit Intermittent/Erratic." Set when the PCM detects an intermittent or erratic signal from the reductant (DEF) level sensor circuit — the reading fluctuates rather than being steadily out of range, often due to loose/corroded connections or a failing in-tank sensor.
What are the most common causes of P203E?
The most common causes of P203E are: Loose, corroded, or intermittent connector, Chafed or intermittently shorting wiring, Faulty/failing reductant level sensor, DEF sloshing with a sticking float/sensor, PCM/dosing control module fault. The specific cause varies by vehicle.
How much does it cost to fix P203E?
Repair costs for P203E range from $900 to $2,500, depending on the vehicle and root cause.
Which vehicles are affected by P203E?
Au7o has documented P203E across 1 vehicle models from 1 manufacturers: Jeep.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.