P2049: Reductant Injection Valve Circuit High Bank 1 Unit 1
What to do
The inducement deadline under P2047 applies. Ask for the injector winding to be measured rather than the part replaced on the code alone — these injectors are not cheap and a corroded connector gives the identical reading.
What this code means
The first reductant injector's circuit reads above its valid range — an open circuit or a short to supply, which read identically at the module. Measuring the injector winding directly separates a failed injector from a broken wire, and on an underfloor harness exposed to salt the wire is at least as likely.
Likely causes
Start here
- Open circuit in injector wiring · moderate
- Corroded or loose connector · easy
- Faulty reductant injector · specialist
Less common
- Wiring shorted to voltage · moderate
Symptoms
Components involved
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
Be the first to write this up
Nothing posted about this yet. Whatever you found is worth writing down — even a dead end saves someone the same afternoon.
What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
Sign in or create an account to add what you found about P2049.