P20F7 code meaning
Reductant Injection Valve Stuck Open (Bank 2 Unit 1)
Powertrain system Generic code P20xx codes Check engine light
What P20F7 means
P20F7 is the bank 2 version of P20F6 and only applies to engines with a second exhaust line that has its own SCR catalyst and dosing valve, typically V engines with separate aftertreatment per bank. The control unit judges that this valve no longer closes, usually because pressure cannot be held or the pump must deliver far more than the commanded dose. No maker documents P20F7 publicly; on the bank 1 side FCA uses P20F6 on the 2.0 L diesel Jeep Compass and cures it with software. A Cummins patent explains the underlying comparison of pump effort and expected flow, where a large negative error means a stuck-open valve or a leak. CARB requires reductant delivery faults to be detected before emissions exceed the limits. Overdosing on one bank causes ammonia slip and deposits there. The stuck-closed code for bank 2 is P208F.
P20F7 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 2.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P20F7
- Check engine light and DEF warning
- Higher DEF consumption and deposits in the bank 2 exhaust
- Dosing switched off and later inducement
Common causes of P20F7
- Most likelyCrystals or debris on the bank 2 valve seat
- PossibleMechanically sticking or heat-damaged bank 2 dosing valve
- Less likelyLeaking or detached supply line at the bank 2 valve
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Reductant injection valve
What each part of P20F7 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. |
| F7 | The exact fault in that area. |
What to do next
- Note P20F7 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 P20F7
What does P20F7 mean?
P20F7 means "Reductant Injection Valve Stuck Open (Bank 2 Unit 1)". P20F7 is the bank 2 version of P20F6 and only applies to engines with a second exhaust line that has its own SCR catalyst and dosing valve, typically V engines with separate aftertreatment per bank. It is a generic code, so it means the same on every make.
Is it safe to drive with P20F7?
Drive gently and only to a workshop. With P20F7 the car can go into limp mode (reduced power) to protect itself.
Will P20F7 fail an emissions test?
Yes, it can. P20F7 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 P20F7 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2.5 hours of work. This is a job for a workshop.
Will P20F7 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.