codes, codes codes lots of codes
Thread Starter
Instructor
Joined: Nov 2010
Posts: 127
Likes: 0
From: Twin Falls Id
codes, codes codes lots of codes
so I get the 82 running pretty good, she is strong, sounds healthy. but yesterday I had a check engine light come on and stay on. I pulled the codes- 22,23,33,42,44.
I corrected all the issues and now I get all these codes again. what the heck
Any suggestions??
Marcus
I corrected all the issues and now I get all these codes again. what the heck
Any suggestions??
Marcus
Le Mans Master
Joined: May 1999
Posts: 6,692
Likes: 29
From: Texas
I have a code 42 and have no idea why. Every so often, the check engine light will go off, which I interpret to be no code 42. But it will come one again later. Wonder about ignition module, but I think I read somewhere that an ignition module will either run or fail. No in between.. Have asked here before to no avail.
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,114
From: Crossville TN
22 - throttle position sensor low voltage
23 - manifold air temp 'high' (Not used)
33 - MAF/MAP sensor too high
42 - EST (electronic spark timing) problem
43 - ESC (electronic spark control) problem/knock sensor
23, 42, & 43 are probably secondary faults resulting from a primary problem in the throttle position sensor and/or MAF/MAP sensor.
Here's a website with the various codes and some info on the system:
http://www.pcfred.com/Vettetip/ECM%20troublecodes.htm
23 - manifold air temp 'high' (Not used)
33 - MAF/MAP sensor too high
42 - EST (electronic spark timing) problem
43 - ESC (electronic spark control) problem/knock sensor
23, 42, & 43 are probably secondary faults resulting from a primary problem in the throttle position sensor and/or MAF/MAP sensor.
Here's a website with the various codes and some info on the system:
http://www.pcfred.com/Vettetip/ECM%20troublecodes.htm
Thread Starter
Instructor
Joined: Nov 2010
Posts: 127
Likes: 0
From: Twin Falls Id
22 - throttle position sensor low voltage
23 - manifold air temp 'high' (Not used)
33 - MAF/MAP sensor too high
42 - EST (electronic spark timing) problem
43 - ESC (electronic spark control) problem/knock sensor
23, 42, & 43 are probably secondary faults resulting from a primary problem in the throttle position sensor and/or MAF/MAP sensor.
Here's a website with the various codes and some info on the system:
http://www.pcfred.com/Vettetip/ECM%20troublecodes.htm
23 - manifold air temp 'high' (Not used)
33 - MAF/MAP sensor too high
42 - EST (electronic spark timing) problem
43 - ESC (electronic spark control) problem/knock sensor
23, 42, & 43 are probably secondary faults resulting from a primary problem in the throttle position sensor and/or MAF/MAP sensor.
Here's a website with the various codes and some info on the system:
http://www.pcfred.com/Vettetip/ECM%20troublecodes.htm
Race Director
Joined: Jan 2000
Posts: 13,014
Likes: 2,257
From: Corsicana, Tx
2020 C2 of the Year - Modified Winner
2020 Corvette of the Year (performance mods)
C2 of Year Winner (performance mods) 2019
2017 C2 of Year Finalist
Could be an intermittent signal issue from the TPS. Regardless of adjustment, the ECM is seeing low voltage as compared to what it's seeing on the MAP. CK wiring real good preferably with an ohm meter while moving them around some.
7T1Vette is right...usually it's the first code that is the issue and the others are reactions to it. Ck grounds REAL good on the engine.
JIM
7T1Vette is right...usually it's the first code that is the issue and the others are reactions to it. Ck grounds REAL good on the engine.
JIM
Thread Starter
Instructor
Joined: Nov 2010
Posts: 127
Likes: 0
From: Twin Falls Id
Could be an intermittent signal issue from the TPS. Regardless of adjustment, the ECM is seeing low voltage as compared to what it's seeing on the MAP. CK wiring real good preferably with an ohm meter while moving them around some.
7T1Vette is right...usually it's the first code that is the issue and the others are reactions to it. Ck grounds REAL good on the engine.
JIM
7T1Vette is right...usually it's the first code that is the issue and the others are reactions to it. Ck grounds REAL good on the engine.
JIM
time to test run it and see if the check engine light comes on again.
Thread Starter
Instructor
Joined: Nov 2010
Posts: 127
Likes: 0
From: Twin Falls Id
22 - throttle position sensor low voltage
23 - manifold air temp 'high' (Not used)
33 - MAF/MAP sensor too high
42 - EST (electronic spark timing) problem
43 - ESC (electronic spark control) problem/knock sensor
23, 42, & 43 are probably secondary faults resulting from a primary problem in the throttle position sensor and/or MAF/MAP sensor.
Here's a website with the various codes and some info on the system:
http://www.pcfred.com/Vettetip/ECM%20troublecodes.htm
23 - manifold air temp 'high' (Not used)
33 - MAF/MAP sensor too high
42 - EST (electronic spark timing) problem
43 - ESC (electronic spark control) problem/knock sensor
23, 42, & 43 are probably secondary faults resulting from a primary problem in the throttle position sensor and/or MAF/MAP sensor.
Here's a website with the various codes and some info on the system:
http://www.pcfred.com/Vettetip/ECM%20troublecodes.htm
marcus
Race Director
Joined: Jan 2000
Posts: 13,014
Likes: 2,257
From: Corsicana, Tx
2020 C2 of the Year - Modified Winner
2020 Corvette of the Year (performance mods)
C2 of Year Winner (performance mods) 2019
2017 C2 of Year Finalist
Just so we're talking about the same thing...I know you're measuring volts with a combination volt/ohmeter which is correct.
When I mentioned the ohm function I was suggesting that you measure the resistance of the wiring from the TPS to the ECM while wiggling connections etc.
It shouldn't be moving around...you may just have a TPS switch on the fritz and need to replace it. But need to verify input voltage to it also. Doubt that's an issue...but could be. Ck grounds also.
As I mentioned the ECM is telling us it saw low voltage and it reacted to it. We just need to figure out why that happens sometimes. I doubt adjustment alone will be the answer unless it slipped or throttle sticks or something like that.
JIM
When I mentioned the ohm function I was suggesting that you measure the resistance of the wiring from the TPS to the ECM while wiggling connections etc.
It shouldn't be moving around...you may just have a TPS switch on the fritz and need to replace it. But need to verify input voltage to it also. Doubt that's an issue...but could be. Ck grounds also.
As I mentioned the ECM is telling us it saw low voltage and it reacted to it. We just need to figure out why that happens sometimes. I doubt adjustment alone will be the answer unless it slipped or throttle sticks or something like that.
JIM
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Thread Starter
Instructor
Joined: Nov 2010
Posts: 127
Likes: 0
From: Twin Falls Id
Just so we're talking about the same thing...I know you're measuring volts with a combination volt/ohmeter which is correct.
When I mentioned the ohm function I was suggesting that you measure the resistance of the wiring from the TPS to the ECM while wiggling connections etc.
It shouldn't be moving around...you may just have a TPS switch on the fritz and need to replace it. But need to verify input voltage to it also. Doubt that's an issue...but could be. Ck grounds also.
As I mentioned the ECM is telling us it saw low voltage and it reacted to it. We just need to figure out why that happens sometimes. I doubt adjustment alone will be the answer unless it slipped or throttle sticks or something like that.
JIM
When I mentioned the ohm function I was suggesting that you measure the resistance of the wiring from the TPS to the ECM while wiggling connections etc.
It shouldn't be moving around...you may just have a TPS switch on the fritz and need to replace it. But need to verify input voltage to it also. Doubt that's an issue...but could be. Ck grounds also.
As I mentioned the ECM is telling us it saw low voltage and it reacted to it. We just need to figure out why that happens sometimes. I doubt adjustment alone will be the answer unless it slipped or throttle sticks or something like that.
JIM
