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Audible Spark Knock (Detonation), MIL Illuminated, DTC P0332 Set (Replace Rear Bank Knock Sensor and RTV Area Around Sensor) #02-06-04-023
Audible Spark Knock (Detonation), MIL Illuminated, DTC P0332 Set (Replace Rear Bank Knock Sensor and RTV Area Around Sensor)
1998-2002 Chevrolet Camaro, Corvette

1998-2002 Pontiac Firebird

with 5.7L Engine (VIN G -- RPO LS1)

1999-2002 Chevrolet and GMC C/K Pickup and Utility Models (Avalanche, Silverado, Sierra, Tahoe, Suburban, Yukon, Yukon XL, Yukon Denali, Yukon Denali XL)

with 4.8L, 5.3L or 6.0L Engine (VINs V, T, Z, N, U -- RPOs LR4, LM7, L59, LQ9, LQ4)

Condition
Some customers may comment on a mild to severe engine ping (commonly referred to as spark knock), usually worse during acceleration and/or an illuminated MIL. Upon investigation, the technician may find DTC P0332 set.

Cause
This condition may be the result of corrosion of the rear bank knock sensor due to water intrusion into the sensor cavity. This condition is more apparent on vehicles in which customers frequently wash the engine compartment.

Correction
Replace the rear bank knock sensor and build a dam (wall) around the sensor using RTV to divert water away from the sensor. Use the procedure and part number listed below.

Remove the intake manifold. Refer to the Intake Manifold Replacement procedure in the Engine Controls sub-section of the appropriate Service Manual.



Remove the wiring harness assembly from the knock sensor.



Remove the rear bank knock sensor.
Install the new rear bank knock sensor. Tighten
Tighten the knock sensor to 20 N·m(15 lb ft).

Install the wiring harness assembly to the knock sensor.



Apply a bead of RTV silicone sealant approximately 9 mm (3/8 in) wide and 6 mm (1/4 in) high along the outside edge of the ridge on the engine block valley cover around the rear bank knock sensor. DO NOT form a complete circle. Leave the rear section open as shown.
From the underside of the intake manifold, completely remove the rear intake manifold seal (foam material).
Install the intake manifold. Refer to the Intake Manifold Replacement procedure in the Engine Controls sub-section of the appropriate Service Manual.
Parts Information
Part Number
Description
Qty

10456603
Sensor, Knock
1


Parts are currently available from GMSPO.

Warranty Information
For vehicles repaired under warranty, use:

Labor Operation
Description
Labor Time

J4437

(F-Car)
Sensor, Knock -- Replace
1.7 hrs

Add

(1998-1999 F-Car Only)
To Remove EGR
0.2 hr

J4437

(Y-Car)
Sensor, Knock -- Replace
1.6 hrs

J4437

(C/K-Truck)
Sensor, Knock -- Replace
1.5 hrs

Add

(C/K Truck Only)
With Three Piece Engine Covers
0.2 hr

Add

(All)
Diagnosis Time
0.3 hr

Add

(All)
To RTV Area Around Sensor and Remove Intake Manifold Seal
0.2 hr

:seeya

 

C5 TECH, hi,

Have many thanks for your ever enduring willingness to post always the latest GM-TSBs and lot's of other helpful information re our Dream-Cars to this Board! :cheers: :cheers: I had printed-out this one for completitude of my data-base.

Keep up the good work and may you "feel" the gratitude of thousands of the Members reading (and waiting) you with pleasure here around.

With the same pleasure, I send you greetings from far away Switzerland.

Joe.

 

Hey, Joe! How are you?

C-5 Tech, as always, thanks for your vigilance and your willingness to help. :cheers: :flag

 

Many thanks from here too. I use these TSB's as a watch list on my car.

 

Thanks for keeping us all informed on the latest TSB's. :cheers:

 

You just gave me a reason to avoid washing the engine compartment.

Thank you :cheers:

 

The C4 had a few "drip zones" where rain would get onto things. Does anyone know if this is the same on a C5? Guess I am wondering if there are other causes for this besides washing the motor.

 

I just took my Z in several weeks ago to fix a persistant knock DIC code. It was driving me absolutely crazy. It was also driving any passengers I had in the car crazy because I would manually check the codes every 30 seconds trying to pin down a pattern of some sort. After adding octane boost with no results, I finally took it to the dealer. The dealer investigated and said the rear knock sensor had oil all over it. I guess it was loose and the oil was coming up from under the manifold valley. They replaced it and the problem was solved.

Love the TSB's, keep it up.