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Registered
1994 sedan deville 4.9
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107 Posts
Discussion Starter #1
So I've got the dreaded p039 code the tcc lock solenoid issue. I've read different things about replacement of the solenoid not fixing this issue as it could be a bad converter or leaky seals, let me know whst you guys think.
 

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Super Moderator
White Diamond '03 DHS (with DTS floor shift)
Joined
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87,179 Posts
Please update your profile to show your year and model so we know what we're talking about.
 

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Super Moderator
White Diamond '03 DHS (with DTS floor shift)
Joined
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87,179 Posts
TSB# 87-65-17
DTC P039 Set When Driving Up Slight Grade After Cold Start

Subject:
DTC P039 Set When Driving Up Slight Grade After Cold Start
(Diagnose/Install New PCM)

Models:
1993-95 Cadillac Eldorado, Seville 1994-95 Cadillac Concours,
Deville With 4.6L Engine (Vin Y - RPO LD8)

Condition:
DTC P039, Torque Converter Clutch Engagment, May Set When
Driving Up A Slight Grade After A Cold Start.

Correction:
A PCM Calibration Enhancement Has Been Released For The Above
Listed Vehicles. If A Vehicle Is Encountered With This
Condition, And All Of The Diagnostic Procedures Listed In The
Service Manual Have Been Performed With No Resulting Correction,
Then Update The Vehicle With The Applicable Calibration Listed
Below.

Parts Information:
Part Number Description 16266755 1993 PCM PROM, 16266762 1994
PCM PROM, 16266767 1995 PCM PROM
 

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Registered
1994 sedan deville 4.9
Joined
·
107 Posts
Discussion Starter #5
TSB# 87-65-17
DTC P039 Set When Driving Up Slight Grade After Cold Start

Subject:
DTC P039 Set When Driving Up Slight Grade After Cold Start
(Diagnose/Install New PCM)

Models:
1993-95 Cadillac Eldorado, Seville 1994-95 Cadillac Concours,
Deville With 4.6L Engine (Vin Y - RPO LD8)

Condition:
DTC P039, Torque Converter Clutch Engagment, May Set When
Driving Up A Slight Grade After A Cold Start.

Correction:
A PCM Calibration Enhancement Has Been Released For The Above
Listed Vehicles. If A Vehicle Is Encountered With This
Condition, And All Of The Diagnostic Procedures Listed In The
Service Manual Have Been Performed With No Resulting Correction,
Then Update The Vehicle With The Applicable Calibration Listed
Below.

Parts Information:
Part Number Description 16266755 1993 PCM PROM, 16266762 1994
PCM PROM, 16266767 1995 PCM PROM
Thanks for the info, will this updated prom work with the 4.9/4t60-e trans, as I only see 4.6 listed
 

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Super Moderator
White Diamond '03 DHS (with DTS floor shift)
Joined
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87,179 Posts
Oh, I missed that. Since it is for the Northstar equipped cars it would be for a 4T80E, not the 4T60E in your car. Sorry I saw '94 - '95 Deville and didn't read any further. Disregard that TSB.
 

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Registered
1994 sedan deville 4.9
Joined
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107 Posts
Discussion Starter #7
Oh, I missed that. Since it is for the Northstar equipped cars it would be for a 4T80E, not the 4T60E in your car. Sorry I saw '94 - '95 Deville and didn't read any further. Disregard that TSB.
So I'm for certain looking at solenoid replacement at the very least.
 

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Super Moderator
White Diamond '03 DHS (with DTS floor shift)
Joined
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87,179 Posts
Probably. If you are not subjected to emission testing, ignore it.
 
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