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2002 GMC Envoy SLT Questions & Answers
ABS Trouble Codes C0236 and C0237 on 2002 GMC Envoy SLT AWD
the c0236 is you have lost the rear sensor signal ... check grounds and all other connections to the ECBM. [under driver seat.] possible the ECBM is bad / top electrical portion or if live in rust /salty belt abs sensor harness -housing -connectors can be damaged or corroded --- https://www.obd-data.com/c0236.html https://www.engine-codes.com/c0237_chevrolet.html
If I wiggle the fuse 23 it puts the engine in reduce power mode why?
Fuse # 23 is for the ETC - electronic throttle control an that system is what causes reduced power mode . Don't wiggle the fuse .an then it won't take B+ voltage from the throttle control system . Is the fuse box where it plugs into burnt looking , high resistance will cause that . Does the fuse fit tight in it's socket ? If not spread the contacts so it does . If it doesn't do it unless you wiggle it , leave it a lone !
What does code P0131 mean
Bank 1 sensor 1 O2 sensor showing low voltage. Check for vacuum leaks first, then replace the O2 sensor if there are no leaks.
Getting code C0292 lost communication with Engine Control System any ideas on a fix! 2004 GMC Yukon Denali XL
The C0292 code in your 2004 GMC Yukon Denali XL indicates a communication issue between the Powertrain Control Module (PCM) and the Electronic Brake Control Module (EBCM). Here are some steps to diagnose and potentially fix the problem:
Check Ground Connections:
Inspect the ground connections related to the PCM and EBCM.
Follow the ECM ground and ABS module ground.
Check the ground on the firewall (driver's side) and the frame rail under the driver's seat.
Also, verify the engine ground on the driver's side.
Inspect Wiring and Connectors:
Visually examine the wiring harness and connectors associated with the EBCM.
Look for any signs of damage, such as broken wires or corroded pins.
Ensure that the connector pins are not bent or pushed out.
Pay attention to any loose or poor electrical connections.
Consider the Tune:
If you've recently modified the vehicle's tuning, consider reverting to a different tune.
Sometimes, a specific tune can cause communication issues.
If you suspect the tune, contact the tuner for further guidance1.
Professional Diagnosis:
If the above steps don't resolve the issue, it's advisable to seek professional help.
A qualified mechanic can perform a thorough diagnosis using specialized tools.
Keep in mind that diagnostic costs typically range from $75 to $150 per hour.
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