what do i do when the code reads P0155?

1999 CHEVROLET ASTRO
Avatar
RICHSAR86
  • MEMBER
  • 2 POSTS
I have a 99 Chevy astro cargo van. The code reads P0155 - oxygen sensor heater, bank 2 sensor 1. Do I replace the sensor or is there a hidden issue that I need to take care of?
Jun 7, 2012 at 1:21 AM
Advertisement
Avatar
ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
you need to verify powers and grounds to the o2 first. then you measure the resistance across the heater portion of the sensor and make sure it is within specs.

Roy
Jun 7, 2012 at 1:23 AM
Avatar
RICHSAR86
  • MEMBER
  • 2 POSTS
I'm not a mechanic so how do I do that? Can you tell me step by step ?
Jun 7, 2012 at 1:25 AM
Avatar
ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
if you are not familiar with thw system and how it works, get some help as you need an ohm meter and a voltmeter, a wiring diagram and be able to acess the connector.

Roy
Jun 7, 2012 at 1:32 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.