DTC P0170 — Fuel Trim (Bank 1)
P0170 indicates: Fuel Trim (Bank 1).
Diagnostic summary
P0170
What it means
Fuel Trim (Bank 1)
Can you drive?
⚠️ Drive with caution
Urgency
Medium 5/10
Typical price
$50 – $500
Check first
Read DTCs with OBD-II scanner
Updated May 7, 2026 Seen on Powertrain
AI + user reports
Scan P0170 in Fixlith Scan
Available for iPhone and Android · Open P0170 in app · Save this DTC to garage
I have this code
Add your car and symptoms to get a more practical first step.
ℹ️ What does it mean?
Fuel Trim (Bank 1)
🔍 Symptoms
- • Check Engine Light on
- • Reduced engine performance
- • Increased fuel consumption
- • Unusual engine behavior
⚠️ Possible Causes
- ⚠ Vacuum leak
- ⚠ Faulty MAF sensor
- ⚠ Fuel pressure issue
- ⚠ O2 sensor fault
- ⚠ Injector clog
🚗 Can I drive with this code?
Drive with caution
Drive with caution. Schedule a repair soon.
🔧 How to Diagnose
- 1 Read DTCs with OBD-II scanner
- 2 Check freeze frame data
- 3 Inspect related components
- 4 Clear codes and test drive
🛠️ How to Fix
- 1 Fix vacuum leaks
- 2 Clean or replace MAF
- 3 Check fuel pressure
- 4 Replace O2 sensor
💰 Estimated Repair Cost
Repair cost by car / region
Early rough estimate. Accuracy improves as more real repair stories are added.
DIY / parts$18 – $325
Mechanic / labor$23 – $375
Repair range$50 – $500
❓ FAQ
What does P0170 mean?
Fuel Trim (Bank 1)
How serious is P0170?
Severity: medium. Drive with caution. Schedule a repair soon.
How much does it cost to fix P0170?
Estimated repair cost: $50–$500 depending on vehicle and region.
Free on iOS and Android
Scan your car with Fixlith Scan
OBD-II Scanner · AI Diagnostics · DTC Decoder
- Scan P0170 instantly
- AI-powered cause analysis
- Repair cost estimate
Scan P0170 in Fixlith Scan
Open P0170 in app
Save this DTC to garage