OBD-II Generic Error Code P2057: How to Fix Reductant Injector Circuit B1U2 Range

Q: What does OBD-II code P2057 mean?

Code P2057 indicates a range/performance problem in the reductant injector circuit for Bank 1 Unit 2. It means the injector's electrical circuit is not functioning within expected parameters.

Q: Can I drive with a P2057 code?

It is not recommended. The vehicle may enter limp mode, and continued driving could damage the SCR system. Fix the issue promptly.

Q: How do I clear code P2057?

After repairing the cause, use an OBD2 scanner to clear the code. However, if the fix is incomplete, the code will return.

Q: What parts are needed to fix P2057?

Commonly needed parts include the reductant injector, wiring harness connectors, and possibly the SCR module. Always diagnose before buying parts.

Q: How much does it cost to fix P2057?

Costs vary. DIY with a new injector can be $100-$300. Professional repair may range from $300-$800 including diagnostics.

Abstract

Error code P2057 indicates a problem in the reductant injector circuit for Bank 1 Unit 2 (B1U2). This typically means the injector's electrical circuit has an issue such as an open, short, or range malfunction. It affects vehicles with selective catalytic reduction (SCR) systems, often in diesel engines.