Bought a C5 recently look at all these codes
Thread Starter
Intermediate
Joined: Aug 2025
Posts: 32
Likes: 2
From: Orange County
Bought a C5 recently look at all these codes
Engine & Emissions
Communication & Module
Body & Chassis
Chassis/Brake/ABS
Fuel/Transmission Control
- P0143 HC
- P0135 C
- P0141 HC
- P0154 HC
- P0161 HC
- P0300 H
- P0463 H
- P1125 H
- P1258 H
- P1280 H
- P1281 H
Communication & Module
- U1301 H
- U1016 H
- U1064 H (listed twice)
- U1096 H
- U1160 H
- U1255 H
Body & Chassis
- B0361 H
- B0367 H
- B2262 H
- B2264 H
- B2282 H
- B2283 H
- B2284 H
- B2287 H
Chassis/Brake/ABS
- C1226 H
- C1278 H
- C1283 H
- C1293 H
- C1294 H
Fuel/Transmission Control
- C2100 H C
- C2105 H C
- C2110 H C
- C2115 H C
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,641
Likes: 4,082
From: Cape Coral, Florida
Most of these are “H” or history DTC’s….just erase all the codes and see what comes back the next few times you drive the car…most power plant DTC’s are “2 trip” DTC’s so the fault must be happening twice in a row for the DTC to set and the MIL to illuminate…as a new member it is best if you fill out your profile…as a minimum we need to know your model year.
Thread Starter
Intermediate
Joined: Aug 2025
Posts: 32
Likes: 2
From: Orange County
Most of these are “H” or history DTC’s….just erase all the codes and see what comes back the next few times you drive the car…most power plant DTC’s are “2 trip” DTC’s so the fault must be happening twice in a row for the DTC to set and the MIL to illuminate…as a new member it is best if you fill out your profile…as a minimum we need to know your model year.
thank you just did it’s a 02 c5
Thread Starter
Intermediate
Joined: Aug 2025
Posts: 32
Likes: 2
From: Orange County
Thanks
Most of these are “H” or history DTC’s….just erase all the codes and see what comes back the next few times you drive the car…most power plant DTC’s are “2 trip” DTC’s so the fault must be happening twice in a row for the DTC to set and the MIL to illuminate…as a new member it is best if you fill out your profile…as a minimum we need to know your model year.
alright so I did what you said and these came back , the old owner said it’s got no cats , and a power steering leak but it went into reduced engine mode , ima have a mechanic check it soon but wanted to see if anyone has had this issue , it’s got 164,000 miles
Bo361 H
Bo441H
Po134
Po154
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,641
Likes: 4,082
From: Cape Coral, Florida
Well you and thousands of owners have had these issues…0134/0154 are O2 sensor codes and have nothing to do with no cats…the Reduced Power could be a number of things and you can have him look at the 2 other HVAC ones…hope your mechanic isn’t just a “parts changer” as the majority are…good luck !!
