Check Engine Light with codes P0171 & P0172 on Isuzu Ascender

Submitted by Jim Taddei · May 29, 2025

Published by RepairPal

Problem overview

The Check Engine Light may illuminate with codes P0171 and P0172 stored. Our technicians tell us reprogramming the powertrain control module (PCM) and replacing the fuel pump may be necessary to correct this concern.

5 people reported this problem

0 comments

Schedule Repair

Isuzu Ascender vehicles with this problem

3 model years affected

Search for another problem

RepairPal ™Car Genius

Ask our experts about your Isuzu.

RepairPal Car Genius™ is a free resource for vehicle owners seeking advice on maintenance, auto repair, shop inquiries, estimates, and finding a trustworthy repair shop in your area.

Call us at 877-913-1554

Available 9am – 6pm ET Monday through Friday

Call Our Experts

Exceptional warranty

Shops offer at least a 12-month or 12,000-mile warranty.

Satisfied customers

We ensure high satisfaction through verified customer reviews.

Transparent pricing

You'll get a Fair Price Guarantee on all RepairPal estimates.

Millions trust us for auto repair — RepairPal Certified^® locations must pass a rigorous approval process to ensure quality, customer satisfaction, and fair pricing.

Find a Repair Location

Get an Estimate Find Repair Location Why RepairPal?How To Guides

Problems Questions Recalls Reviews Troubleshooting Guide Encyclopedia Car Care Advice Reliability Ratings

Shop Owners Dealership Fixed Ops Certified Shop Resources Schedule a Demo Dashboard Login

Mission FAQ Partners Social Impact News & Media Jobs Blog Support Contact Us

Getting Started

Get an Estimate Find Repair Location Why RepairPal?How To Guides

Learn About Your Car

Problems Questions Recalls Reviews Troubleshooting Guide Encyclopedia Car Care Advice Reliability Ratings

For Business

Shop Owners Dealership Fixed Ops Certified Shop Resources Schedule a Demo Dashboard Login

About RepairPal