p0171
Moderate
Chrysler · Minivans & Sedans
System Too Lean (Bank 1)
Quick Answer
Error code P0171 on your Chrysler Minivans & Sedans means: System Too Lean (Bank 1). This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Likely Causes
How to Fix It
1
Connect OBD-II scanner to read freeze frame data
2
Inspect oxygen sensors and vacuum lines for leaks
3
Test fuel pressure and injector spray pattern
4
Perform fuel system pressure test
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Oxygen sensor
Fuel injector
Fuel filter
Vacuum hoses
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