← View Generic P0159 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

P0159: P0159: Fuel Trim Malfunction Bank 2 Sensor 2

on 2020 Chevrolet SILVERADO 1500 PICKUP

Fix Cost
$100 - $500
Parts & Labor
Difficulty
3/5
1-2 hours
DIY Possible?
✅ Yes
Save money
Your Vehicle
2020 Chevrolet
SILVERADO 1500 PICKUP
⚠️

Important for 2020 Chevrolet SILVERADO 1500 PICKUP Owners

Before starting repairs, verify which engine your 2020 Chevrolet SILVERADO 1500 PICKUP has. Check your VIN or engine code to ensure you order the correct parts.

📖 What Does P0159 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The fuel trim system has detected a malfunction in the fuel delivery system, specifically in Bank 2 Sensor 2, which may be causing the engine to run rich or lean.
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Symptoms

  • • Poor fuel economy
  • • rough engine idle
  • • decreased power
  • • and a check engine light
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Common Causes

  • • Faulty fuel pressure regulator
  • • clogged fuel filter
  • • faulty oxygen sensor
  • • vacuum leaks
  • • or a malfunctioning fuel injector
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How to Fix P0159 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check and clean or replace the fuel filter. 2. Inspect and repair any vacuum leaks. 3. Test and replace the fuel pressure regulator if necessary. 4. Check and replace the oxygen sensor if necessary. 5. Check and clean or replace the fuel injectors if necessary.

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Need Maintenance Info for Your SILVERADO 1500 PICKUP?

Get oil capacity, filter specs, and torque settings for your specific 2020 Chevrolet SILVERADO 1500 PICKUP.

View 2020 Chevrolet SILVERADO 1500 PICKUP Specs

Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

fuel filter Shop ↗ fuel pressure regulator Shop ↗ oxygen sensor Shop ↗ fuel injectors Shop ↗

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OBD2 Scanner

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Related Diagnostic Codes

Other codes that may appear with P0159

P0157 Sequential Code

P0157: Fuel Heated Oxygen Sensor (Bank 2 Sensor 2) Circuit Low Voltage

Medium
P0158 Sequential Code

P0158: Fuel Trim Malfunction (Bank 2 Sensor 2)

Medium
P0160 Sequential Code

P0160: Fuel Pressure Regulator Circuit Malfunction

Medium
P0161 Sequential Code

P0161: Fuel Pressure Regulator Circuit Low Input

Medium

💡 Why These Codes Are Related:

  • • Similar Issues: Same root cause or component failure
  • • Related Problems: Often occur together due to system interactions
  • • Sequential Codes: Progressive failure stages or multiple sensors
  • • Same System: Components within the same automotive system