Volvo Community Forum. The Forums of the Volvo Owners Club

Forum Rules Volvo Owners Club About VOC Volvo Gallery Links Volvo History Volvo Press
Go Back   Volvo Owners Club Forum > "Technical Topics" > S40 / V40 '96-'04 General

Notices

S40 / V40 '96-'04 General Forum for the Volvo S40 and V40 (Classic) Series from 1995-2004.

Information
  • VOC Members: There is no login facility using your VOC membership number or the details from page 3 of the club magazine. You need to register in the normal way
  • AOL Customers: Make sure you check the 'Remember me' check box otherwise the AOL system may log you out during the session. This is a known issue with AOL.
  • AOL, Yahoo and Plus.net users. Forum owners such as us are finding that AOL, Yahoo and Plus.net are blocking a lot of email generated from forums. This may mean your registration activation and other emails will not get to you, or they may appear in your spam mailbox

Thread Informations

v40 1999, P0135

Views : 365

Replies : 1

Users Viewing This Thread :  

Reply
 
Thread Tools Display Modes
Old Aug 15th, 2019, 16:00   #1
dahlgren
New Member
 

Last Online: Sep 3rd, 2019 16:40
Join Date: Aug 2019
Location: skellefteå
Default v40 1999, P0135

Hi all,

getting P0135 from my ODB reader (O2 Sensor Heater Circuit (Bank 1 Sensor 1)):
- heater resistance 6 ohm, which seems reasonable (-> no open circuit, no short)

Disconnected O2 sensor cable, to measure O2 heater supply voltage without the load from the sensor:
a) ignition ON, engine OFF -> 3.8 volts
b) ignition ON, engine RUNNING -> 9.9 volts

Seems like odd values?
expected around 0 volts in case (a), and around 12 volts in case (b)...
supply wiring issue? or something I have missed?
Assume the heater power supply loop is controlled by the ECU somehow?
O2 sensor fuse checked/ok.
Is there possibly also a relay somewhere in the O2 heater power feed line?

Additional info:
engine code: B4204T
O2 sensor is 4-wire (yellow-black-white-red), heater on white/red loop.

Last edited by dahlgren; Aug 15th, 2019 at 16:41. Reason: added O2 sensor wiring
dahlgren is offline   Reply With Quote
Old Aug 19th, 2019, 12:34   #2
dahlgren
New Member
 

Last Online: Sep 3rd, 2019 16:40
Join Date: Aug 2019
Location: skellefteå
Default "odd values" - ok

The voltage "odd values" mentioned in previous post seems to be ok after all:
had a chance to compare with a s40/2000, and the measurement results were more or less identical...
dahlgren is offline   Reply With Quote
Reply

Tags
o2 sensors, p0135


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +1. The time now is 14:45.


Powered by vBulletin
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.