HELP! 7 codes!

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Aug 18, 2004 | 03:51 PM

SonnyinVA

Thread Starter

Melting Slicks

Joined: Apr 2002

Posts: 2,308

Likes: 1

From: Portsmouth VA

HELP! 7 codes!

i did the manual diagnostics...
and it says 7 codes!

here's what i got... can anybody tell me what they mean?

10 PCM 2 codes
P0327 HC
P1626 H

40 BCM 2 codes
B 2527 HC
B 2723 H

99 HVAC 1 code
B 0361 H

B0-RFA 2 codes
C2100 HC
C2115 HC

thanks in advance!
sonny

Aug 18, 2004 | 04:24 PM

Don Baldwin

Instructor

Joined: Mar 2001

Posts: 203

Likes: 1

From: Columbus GA

10 PCM 2 codes
P0327 HC (Knock Sensor)
P1626 H (Theft Deterrent Fuel Enable Signal Lost)

40 BCM 2 codes
B 2527 HC (Horn Relay Circuit)
B 2723 H (PASS-Key Detection Circuit)

99 HVAC 1 code
B 0361 H (Left Actuator Feedback Short to GND)

B0-RFA 2 codes
C2100 HC (Left Front TPM Sensor Malfuction)
C2115 HC (Left Rear TPM Sensor Malfuction)

Aug 18, 2004 | 04:37 PM

SonnyinVA

Thread Starter

Melting Slicks

Joined: Apr 2002

Posts: 2,308

Likes: 1

From: Portsmouth VA

allright, i just got this car, so just working the bugs out... trying to get the car straight so my (single) mom can drive it to carlisle.

ok, i knew the 2 tire pressure sensors were bad... i hope they just need to be rebuilt.

i know the horn has a short in it somewhere... haven't dug into it too far yet to find it. i'm hoping to do it this weekend. i tried to replace the blown fuse but then the horn just blows constantly.

so, the knock sensor is bad? probably?

what causes the theft deterrent fuel enable issue? the ignition switch does seem like it's been jacked with... maybe the problem starts there somehow?

Left Actuator Feedback Short to GND? WTH? anybody translate this to english? the climate control works fine... the only issue is the LCD display fades in and out... probably not related?

PASS-Key Detection Circuit? is this also ignition swith related? possibly?

thanks in advance, guys!!!
see ya, sonny

Aug 18, 2004 | 06:13 PM

runamuk

Le Mans Master

Joined: Jul 2002

Posts: 7,370

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From: Slave to the evil empire

Cruise-In V Veteran

St. Jude Donor '04

Quote:

Originally Posted by SonnyinVA

so, the knock sensor is bad? probably?

This is almost a common problem in C5's of people who wash there engine, the water will get into the well where the knock sensor is located and short it out. There is a TSB from GM that calls for replacing the faulty knock sensor and then using rtv sealant, apply the sealant as to build up a dam around the opening where the knock sensors are located

Quote:

what causes the theft deterrent fuel enable issue? the ignition switch does seem like it's been jacked with... maybe the problem starts there somehow?

Thats probably a good guess, I'm also not sure about the cause without my service manual but since it's a history code just disregard it, on that note disregard any code followed by the letter "H", you only need to be concerned with the codes followed by a "C" or a "HC"

Quote:

Left Actuator Feedback Short to GND? WTH? anybody translate this to english? the climate control works fine... the only issue is the LCD display fades in and out... probably not related?

This is the actuator that controls hot and cold air into the left side of the car and as far as history code see above.

Quote:

PASS-Key Detection Circuit? is this also ignition swith related? possibly?

See above

Erase all of these codes by going into manual diagnostics and holding the "reset" button in each of the module sections and then see which ones come back, I'm willing to bet it will just be the 4 with "HC" after them

Aug 18, 2004 | 06:43 PM

SonnyinVA

Thread Starter

Melting Slicks

Joined: Apr 2002

Posts: 2,308

Likes: 1

From: Portsmouth VA

i reset it twice already and all 7 keep coming back.

where can i find the knock sensor? is there a tech tip about it? sorry, i'm new to c5's so sorry if some of this stuff is common knowledge to c5 owners...

Aug 18, 2004 | 06:54 PM

runamuk

Le Mans Master

Joined: Jul 2002

Posts: 7,370

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From: Slave to the evil empire

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St. Jude Donor '04

I don't think your actually resetting the codes because if you were the history codes would not come back, follow this link codes it will show you how to properly reset them and then the only codes you should see are the current ones.

The knock sensors are located under the intake manifold, once it's removed you'll see both of them, I'm not sure which one is bad based on what I've read so far though

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