OBD code trouble determining cause
Thread Starter
Teching In
Joined: Sep 2022
Posts: 9
Likes: 1
OBD code trouble determining cause I’m not sure how many pro tech people are here, but I have some codes I need to address, but I don’t know how.
OBD code 32
-EGR valve diagnostic switch, closed during engine start up or open when EGR flow requested by ECM
-Sensor signal voltage is low
-Electronic vacuum regulator valve (EVRV) error (EVRV controls EGR vacuum)
OBD code 42
-Electronic spark timing circuit open or shorted
OBD code 43
-electronic spark timing (EST) circuit low voltage detected
-Electronic spark control (ESC) circuit problems
OBD code 44
-lean exhaust indicated (left side on dual oxygen models)
OBD code 45
- Rich exhaust indicated (left side on dual oxygen models)
OBD code 46
- vehicle any death system (VATS) failure
- Power steering pressure switch failure
OBD code 51
- Computer problem, faulty, wrong or incorrectly installed PROM circuit; or ECM/PCM failure
OBD code 53
- System voltage too high (over 17.7 V to ECM) or EGR system fault or alternator voltage not normal or vehicle any theft system fault.
OBD code 54
- Fuel pump circuit fault or mixture control (M/C) solenoid fault or electronic control module (ECM) fault/EGR solenoid number to failure (3.8 L VIN1) —- I have an lT1…
- fuel pump relay
OBD code 55
- Electronic control module (ECM) fault or oxygen sensor circuit fault or EGR solenoid number three failure (3.8L VIN1)
Is my ECM bad? What the hell could cause all of these?
Thanks in advance!
OBD code 32
-EGR valve diagnostic switch, closed during engine start up or open when EGR flow requested by ECM
-Sensor signal voltage is low
-Electronic vacuum regulator valve (EVRV) error (EVRV controls EGR vacuum)
OBD code 42
-Electronic spark timing circuit open or shorted
OBD code 43
-electronic spark timing (EST) circuit low voltage detected
-Electronic spark control (ESC) circuit problems
OBD code 44
-lean exhaust indicated (left side on dual oxygen models)
OBD code 45
- Rich exhaust indicated (left side on dual oxygen models)
OBD code 46
- vehicle any death system (VATS) failure
- Power steering pressure switch failure
OBD code 51
- Computer problem, faulty, wrong or incorrectly installed PROM circuit; or ECM/PCM failure
OBD code 53
- System voltage too high (over 17.7 V to ECM) or EGR system fault or alternator voltage not normal or vehicle any theft system fault.
OBD code 54
- Fuel pump circuit fault or mixture control (M/C) solenoid fault or electronic control module (ECM) fault/EGR solenoid number to failure (3.8 L VIN1) —- I have an lT1…
- fuel pump relay
OBD code 55
- Electronic control module (ECM) fault or oxygen sensor circuit fault or EGR solenoid number three failure (3.8L VIN1)
Is my ECM bad? What the hell could cause all of these?
Thanks in advance!
Last edited by Saint056; Sep 7, 2022 at 02:25 PM. Reason: Incorrect word in title
Joined: Nov 2003
Posts: 11,328
Likes: 345
From: Jacksonville, FL (originally from Toronto Canada)
Ummm... this is an online forum not twitter. You need to allow more than just 15 hours overnight for members to see your thread and respond. There are lots of members here who should be able to help you. You might want to try posting in the General Maintenance & Repairs section - it gets much more traffic for this kind of question than the model-specific sections do (since it's not a model-specific question).
Good luck!
Good luck!
This is a large collection of crazy stuff indicating global electrical failures. Most commonly, when members report this type of thing, there is an issue with the wiring harness. Either an aftermarket exhaust or fire in the engine bay has melted a wire bundle or a squirrel/rat has made a home in the engine bay and chwed through some wiring.
I would trace the wire bundles back from these sensors and examine them closely for any damage first.
