'99 C5 Error Codes
Thread Starter
Heel & Toe
Joined: Dec 2023
Posts: 15
Likes: 1
'99 C5 Error Codes
Got some Error Codes from my recently purchased '99 C5. Researched what all of them mean and listed them out, but not sure how to go about fixing some of the major ones. Any advice? (Codes listed below)
PCM (Powertrain Control Module)
No codes reported.
RFA (Remote Function Actuation)
PCM (Powertrain Control Module)
- P0463 H: Fuel Level Sensor Circuit High Voltage
- P1431 H: Fuel Level Sensor 2 Performance
- P1571 H C: Traction Control Delivered Torque Output Circuit
- C1780 H C: Steering Angle Sensor Circuit Malfunction
- C1790 H: Calibration Memory Error
- B0605 H: Control Module Configuration Error
- B0503 H: HVAC Front Blower Feedback Circuit Range/Performance
- B0508 H: HVAC Rear Blower Feedback Circuit Range/Performance
- B2578 H: Inadvertent Power Circuit
- B2583 H: Rear Window Defogger Relay Circuit
- B2587 H: Rear Window Defogger Switch Circuit
- B2592 H: Rear Window Defogger Indicator Circuit
- B2593 H: Rear Window Defogger Feedback Circuit
- B2647 H C: Ambient Light Sensor Circuit
- B2723 H: HVAC Blower Control Circuit
- B0017 H: Driver Frontal Deployment Loop (Stage 1)
- B1001 H: Option Configuration Error
- U1000 H C: Class 2 Communication Malfunction
- U1301 H: Class 2 Circuit Short to Battery
- U1096 H: Loss of Communications with IPC (Instrument Panel Cluster)
- B0363 H C: HVAC Air Mix Control Circuit
- B0367 H: HVAC Control Head Circuit
- B0441 H C: HVAC Recirculation Control Circuit
- B2252 H: Heated Mirror Control Circuit
- B2282 H: Door Lock Switch Circuit
- B2284 H: Left Rear Door Ajar Circuit
- B2264 H: Left Window Up/Down Control Circuit
- U1064 H: Loss of Communications with DIM (Dash Integration Module)
- U1096 H: Loss of Communications with IPC (Instrument Panel Cluster)
- B2283 H: Heated Mirror Control Circuit
- B2285 H: Door Lock Switch Circuit
- B2263 H: Right Rear Door Ajar Circuit
- B2265 H: Right Window Up/Down Control Circuit
- U1255 H: Class 2 Communication Malfunction
- U1064 H: Loss of Communications with DIM (Dash Integration Module)
- U1016 H: Loss of Communications with PCM (Powertrain Control Module)
- U1096 H: Loss of Communications with IPC (Instrument Panel Cluster)
No codes reported.
RFA (Remote Function Actuation)
- U1096 H: Loss of Communications with IPC (Instrument Panel Cluster)
- U1064 H: Loss of Communications with DIM (Dash Integration Module)
- U1016 H: Loss of Communications with PCM (Powertrain Control Module)
- C2120 H C: Antenna Not Connected
Melting Slicks
Joined: Jun 2017
Posts: 2,568
Likes: 1,182
From: Conyers Georgia
If the car runs fine, erases all those codes. They could be from 1999 for all you know than as you drive the car see which ones if any pop back up. Trying to tackle those many codes at once will turn you into an alcoholic..............
Le Mans Master
Joined: Jun 2016
Posts: 5,386
Likes: 3,925
From: Cincinnati, OH
Clear all the codes and drive the car. See what remains.
That's a whole lot of random stuff to even begin taking something. And or you have some iffy grounds. Would be worth cleaning all ground locations.
That's a whole lot of random stuff to even begin taking something. And or you have some iffy grounds. Would be worth cleaning all ground locations.
Thread Starter
Heel & Toe
Joined: Dec 2023
Posts: 15
Likes: 1
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
STOP THE INSANITY!!!! 
Just ERASE ALL of them and start over. TRUST ME,, If there's something wrong, that DTC will be back.
We can go from that clean sheet!
Bill
Just ERASE ALL of them and start over. TRUST ME,, If there's something wrong, that DTC will be back.
We can go from that clean sheet!
Bill
