P1350 Code: Meaning, Symptoms, Causes & Fix

Overview

Symptoms

• hard starting
• engine may stall at idle
• hesitation under acceleration

Common causes

• Temperature/vibration related circuit dropout affecting fuel level sensor b intermittent/bypass line monitor
• Intermittent harness contact
• Connector pin damage/corrosion or harness stress near related components

How to diagnose P1350

1. Confirm P1350 and capture freeze-frame data with a professional scan tool.
2. Inspect wiring, connectors, and grounds related to fuel level sensor b intermittent/bypass line monitor for obvious defects.
3. Reproduce the fault with harness movement and heat/vibration checks.
4. Check for related DTCs to identify the root-cause chain before replacing parts.
5. After repair, clear codes and confirm readiness monitors complete without recurrence.

Severity of code P1350

Moderate: This code is moderate severity: the vehicle may still operate, but fault progression can increase repair cost over time.

Can you drive with P1350?

Most vehicles can be driven short-term with P1350, but postpone heavy load/highway driving until repaired.

If the warning lamp is flashing or drivability/safety is affected, avoid driving and diagnose immediately.

How to fix it (step-by-step)

1. Repair obvious wiring/connector faults first to prevent repeat parts replacement.
2. Address the root fault mode (intermittent) in the fuel level sensor b intermittent/bypass line monitor circuit/system.
3. Apply the required relearn/adaptation procedure if specified by service information.
4. Road-test and verify P1350 remains cleared under the conditions that originally set the code.

Fix options

• Wiggle-test harness during live monitoring.
• Repair intermittent connector contact.
• Clear DTCs and verify with live data and completed drive cycle.

Typical repair cost

$220-$1100

Common mistakes when diagnosing P1350

• Replacing parts without verifying voltage, ground, and signal integrity first.
• Ignoring related stored/pending codes that indicate upstream faults.
• Skipping post-repair verification drive cycle and readiness checks.

P1350 in common vehicles

P1350 appears across makes such as Mazda, Subaru, Lexus, Jeep. Failure patterns differ by platform: wiring routes, software calibration, and component supplier revisions can change root cause.

Frequently asked questions

What causes P1350?

P1350 is commonly set by intermittent faults affecting fuel level sensor b intermittent/bypass line monitor.

How much does it cost to fix P1350?

For P1350, repair costs are typically $220-$1100 depending on exact root cause, labor rates, and part quality.

Can I clear P1350 without repair?

You can clear P1350 temporarily, but the code usually returns until the underlying fault is corrected.

Helpful tools

• Estimate repair cost
• Decode your VIN
• Calculate fuel cost