P202E code meaning
Reductant Injection Valve Circuit Range/Performance (Bank 1 Unit 1)
Powertrain system Generic code P20xx codes Check engine light
What P202E means
P202E concerns the first DEF dosing valve on bank 1, which in most SCR systems is the only one. The circuit itself is intact, but the valve does not behave as commanded. GM's 6.6 L LML (2014 table) checks what the valve driver was told to do against the actual state of its circuit and sets a Type A code after more than ten mismatches within 80 injections, checked only with the coil between about −7 and 100 °C. In GM's 2018 diesel tables an active stuck-tip fault of the valve also blocks the SCR efficiency test P20EE. Chrysler reflashed the dosing control unit of 2013–2014 Ram 2500 to 5500 with 6.7 L Cummins against needless P202E (bulletin 18-010-14), and Hino traced some cases on 2013 J08 trucks to software misjudging DEF pressure. Real faults are crystal-stuck valves or bad contacts; too little DEF raises NOx.
P202E at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.3 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P202E
- Malfunction indicator lamp on
- DEF system warning, possibly countdown to speed limitation
- Possibly additional SCR efficiency codes
Common causes of P202E
- Most likelyDosing valve sticking from urea crystals or a clogged tip
- PossibleDosing or engine control unit software (updates available on some models)
- PossibleCorroded valve connector or harness
- Less likelyDEF pressure at the valve outside the expected range
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Reductant injection valveReductant metering unit
What each part of P202E means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 0 | Area: fuel and air metering and auxiliary emission controls. |
| 2E | The exact fault in that area. |
What to do next
- Note P202E and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P202E
What does P202E mean?
P202E means "Reductant Injection Valve Circuit Range/Performance (Bank 1 Unit 1)". P202E concerns the first DEF dosing valve on bank 1, which in most SCR systems is the only one. It is a generic code, so it means the same on every make.
Is it safe to drive with P202E?
Drive gently and only to a workshop. With P202E the car can go into limp mode (reduced power) to protect itself.
Will P202E fail an emissions test?
Yes, it can. P202E is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P202E to fix?
Difficulty: medium. A typical repair takes 0.3 to 3 hours of work. This is a job for a workshop.
Will P202E clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.