Discussion:
Check engine light

GC35S Serial # P500124
This machine has a check engine light on, cannot communicate with laptop, and when we try to do the flash codes it does not show it has any codes. After clearing light (by using pedal trick) as soon as we crank it over the light comes back on, but still wont show a stored code?? Anyone have any ideas? I am starting to lean towards the ECU....???
  • Posted 10 Jun 2016 07:25
  • By JAYS
  • joined 16 Apr'16 - 26 messages
  • Iowa, United States
Showing items 1 - 3 of 3 results.
Measure the resistance value across the two wires on the diagnostic port connector where you hook up the laptop. There should be around 120 ohms, if not there is a bad/broken resistor in the harness. It is soldered into the harness about 6-10" from that connector.
  • Posted 9 Jul 2016 05:06
  • By sirthor1881
  • joined 15 Mar'11 - 24 messages
  • Georgia, United States
yes got it fixed. Ended up finding broken wire between ecu and connector for laptop, laptop showed oxygen sensor code, replaced and o.k. now.
Pedal trick is koeo (key on engine off) accel pedal to the floor and fully released 3 times in 3 seconds and it will do "flash codes". To clear codes do pedal dance 10 times within 10 seconds, and code should clear.
Thanks.
  • Posted 7 Jul 2016 22:45
  • By JAYS
  • joined 16 Apr'16 - 26 messages
  • Iowa, United States
Hi,
did you manage to fix this? Also what is the pedal trick?
  • Posted 7 Jul 2016 17:14
  • By luke_m
  • joined 2 Feb'13 - 97 messages
  • Bedfordshire, United Kingdom

Post your Reply

Forkliftaction accepts no responsibility for forum content and requires forum participants to adhere to our rules of conduct. Click here for more information.

If you are having trouble using the Discussion Forums, please contact us for help.

PREMIUM business

Hawker Powersource, Inc.
HAWKER® offers a range of hybrid motive power solutions customized to adapt as your operation's needs change.
Global Industry News
edition #1253 - 23 October 2025
In this week’s Forkliftaction News we look at the October Confidence Index for the US Equipment Finance Industry - a measure of the health of the materials handling and logistics sectors - which has remained steady month-on-month... Continue reading
Global Industry News
edition #1253 - 23 October 2025
In this week’s Forkliftaction News we look at the October Confidence Index for the US Equipment Finance Industry - a measure of the health of the materials handling and logistics sectors - which has remained steady month-on-month... Continue reading

Showcased in the Virtual Expo

Movers & Shakers
Lee Rushton Lee Rushton
Business development manager - UK, IRE, BENELUX, Tyri Lights
President and CEO, Wajax Corporation
Chairman of the board, Tompkins Solutions
Director of government affairs, Associated Equipment Distributors
SMV (Konecranes) 4632CC5
Balling, Denmark
New - Sale
Rail King RK330
Coraopolis, Pennsylvania, United States
New - Sale
Global Industry News
edition #1253 - 23 October 2025
In this week’s Forkliftaction News we look at the October Confidence Index for the US Equipment Finance Industry - a measure of the health of the materials handling and logistics sectors - which has remained steady month-on-month... Continue reading
Fact of the week
Athletes in the ancient Olympic Games participated in the nude showing off their physical power and muscular physique as a tribute to the Greek God Zeus.