IPC Display Functions and Codes
by: Jeff Cole and Hib Halverson
The IPC display, the 20-character, vacuum florescent screen above the steering column that says "Corvette by Chevrolet" every time you turn on the key, is a powerful device. DIY Service Techs are going to be most interested in the IPC’s ability to show diagnostic trouble codes (DTC) for all the modules that transmit them.
The "diagnostic display" mode is entered with the following procedure: Page 8-500
1) turn on the ignition but don’t start the engine.
2) press the "reset" button to turn off any warning messages
3) press and hold "options" and
4) while holding "options", press "fuel" four times within a 10-second period.
Inititially, the on-board diagnostics go into the "automatic" mode which shows each module’s DTCs in a pre-set sequence:
10 PCM Powertrain Control Module page 6-357 - 6-361
28 TCS Traction Control system ABS on page 5-86
?? RTD Real Time damping page 3-136 (I do not have this option)
40 BCM Body Control Module page 8-405 UTD Page 8-727
60 IPC Instrument Panel Cluster page 8-508
80 radio page 8-213
99 HVAC Heater Vent-Air Conditioning page 1-118
A0 LDCM Left Door Control module page 8-904 to 8-951
A1 RDCM Right Door Control Module page 8-904 to 8-951
AC SCM Seat Control module page 8-1064 -8-1082
B0 RFA Remote Function Actuation page 8-676
For each module, all DTCs will be displayed. If none are present in a module, you will see "no more codes" on the ICP display.
There are two kinds of DTCs, "Current" and "History," designated with a letter suffix, "C" or "H". A current code indicates that the malfunction is present in the system whose module is displaying data. A history code indicates a problem existed in that module sometime in the last 40 or 50 ignition cycles. When not accompanied by a current code of the same number, it is possible it’s evidence of a previous problem, now solved, that was not removed by clearing codes. More likely is that a history code indicates an intermittent malfunction. "Intermittents" are the most challenging DTCs. An intermittent may have happened only once, may have happened more than once but is inconsistent in its appearance or may be happening on a regular basis but not at the time the IPC is displaying codes. History codes can also be caused by a current malfunction in a system that is not operating at the time DTCs are displayed. An example is the rear window defogger which doesnąt operate until the BCM detects engine rpm. For history codes set by a system that does not operate with the key on and engine off, a special diagnostic tool called a "scan tester" is necessary to properly diagnose the malfunction.
Once the IPC has displayed all 11 modules, the system goes into the manual mode which allows selection of each module using combinations of DIC buttons. The manual mode can also be entered at any time during the automatic sequence by pressing any button except "E/M". Once the IPC displays "manual diagnostics," you may select a particular module by pressing the "options" button to go forward or the "trip" button to go back. Once a system is selected and a DTC is displayed, if more than one are present; press "gages" to move forward or "fuel" to go back.
To exit the diagnostic mode at any time, press "E/M". If you want to erase or "clear" codes, press "reset." Clearing a code does not repair a problem. You are simply erasing the evidence of it in the module’s memory.
10 PCM Powertrain Control Module page 6-357 - 6-361 Domestic
A=DTC set immediately and MIL is turned on
B=MIL turned on after 2 consecutive drive trips
C=After one failure and stored in History MIL not turned on
P0101 Mass Air Flow (MAF) System performance -B
P0102 Mass Air Flow (MAF) Sensor Circuit Low Frequency -A
P0103 Mass Air Flow (MAF) Sensor Circuit High Frequency -A
P0107 manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage -A
P0108 manifold Absolute Pressure (MAP) Sensor Circuit High Voltage -A
P0112 Intake Air temperature (IAT) Sensor Circuit Low Voltage -B
P0113 Intake Air temperature (IAT) Sensor Circuit High Voltage -B
P0117 Engine Coolant Temperature (ECT) Sensor Low Voltage -A
P0118 Engine Coolant Temperature (ECT) Sensor High Voltage -A
P0118 Engine Coolant Temperature(ECT)Excessive Time to Closed Loop Fuel Control -B
P0131 Heated Oxygen Sensor (HO2S) Circuit Low Voltage Bank 1 Sensor 1 -A
P0132 Heated Oxygen Sensor (HO2S) Circuit High Voltage Bank 1 Sensor 1 -A
P0133 Heated Oxygen Sensor (HO2S) Slow Response Bank 1 Sensor 1 -B
P0134 Heated Oxygen Sensor (HO2S) Circuit Insufficient Activity Bank 1 Sensor 1 -A
P0135 Heated Oxygen Sensor (HO2S) Heater Circuit Bank 1 Sensor 1 -B
P0137 Heated Oxygen Sensor (HO2S) Circuit Low Voltage Bank 1 Sensor 2 -B
P0138 Heated Oxygen Sensor (HO2S) Circuit High Voltage Bank 1 Sensor 2 -B
P0140 Heated Oxygen Sensor (HO2S) Circuit Insufficient Activity Bank 1 Sensor 2 -B
P0141 Heated Oxygen Sensor (HO2S) Heater Circuit Bank 1 Sensor 2 -B
P0151 Heated Oxygen Sensor (HO2S) Circuit Low Voltage Bank 2 Sensor 1 -A
P0152 Heated Oxygen Sensor (HO2S) Circuit High Voltage Bank 2 Sensor 1 -A
P0153 Heated Oxygen Sensor (HO2S) Slow Response Bank 2 Sensor 1 -A
P0154 Heated Oxygen Sensor (HO2S) Circuit Insufficient Activity Bank 2 Sensor 1 -A
P0155 Heated Oxygen Sensor (HO2S) Heater Circuit Bank 2 Sensor 1 -B
P0157 Heated Oxygen Sensor (HO2S) Circuit Low Voltage Bank 2 Sensor 2 -B
P0158 Heated Oxygen Sensor (HO2S) Circuit High Voltage Bank 2 Sensor 2 -B
P0160 Heated Oxygen Sensor (HO2S) Circuit Insufficient Activity Bank 2 Sensor 2 -B
P0161 Heated Oxygen Sensor (HO2S) Heater Circuit Bank 2 Sensor 2 -B
P0171 Fuel Trim System Lean bank 1 -B
P0172 Fuel Trim System Rich bank 1 -B
P0174 Fuel Trim System Lean bank 2 -B
P0175 Fuel Trim System Rich bank 2 -B
P0230 Fuel Pump Control Circuit -A
P0300 Engine Misfire detected- B
P0325 Knock Sensor (KS) System -B
P0327 Knock Sensor (KS) Circuit Front -B
P0332 Knock Sensor (KS) Circuit Rear -B
P0335 CKP Sensor Circuit -A
P0336 CKP Sensor Circuit Performance -A
P0341 CMP Circuit Performance -B
P0342 CMP Sensor Circuit Low Voltage -B
P0343 CMP Sensor Circuit High Voltage -B
P0351 Ignition Control #1 Circuit -A
P0352 Ignition Control #2 Circuit -A
P0353 Ignition Control #3 Circuit -A
P0354 Ignition Control #4 Circuit -A
P0355 Ignition Control #5 Circuit -A
P0356 Ignition Control #6 Circuit -A
P0357 Ignition Control #7 Circuit -A
P0358 Ignition Control #8 Circuit -A
P0410 AIR System -B
P0412 AIR Solenoid relay Control Circuit -B
P0418 AIR Pump Relay Control Circuit -B
P0420 TWC System Low Efficiency Bank 1 -A
P0430 TWC System Low Efficiency Bank 2 -A
P0441 EVAP System No Flow During Purge -B
P0461 Fuel Level Sensor 1 Circuit Performance -C
P0462 Fuel Level Sensor 1 Circuit Low Voltage -C
P0463 Fuel Level Sensor 1 Circuit High Voltage -C
P0480 FC Relay 1 Control Circuit -B
P0481 FC Relay 2 and 3 Control Circuit -B
P0500 VSS Circuit (M/T) -B
P0506 Idle Speed Low -B
P0507 Idle Speed High -B
P0522 Engine Oil Pressure Sensor Circuit Low Voltage (w/message) -C
P0523 Engine Oil Pressure Sensor Circuit High Voltage (w/message) -C
P0530 A/C Refrigerant Pressure Sensor Circuit - C
P0562 System Voltage Low -C
P0563 System Voltage High -C
P0567 Cruise Resume Circuit -C
P0568 Cruise Set Circuit -C
P0571 Cruise Brake Switch Circuit (M/T) -C
P0601 PCM Memory -A
P0602 PCM Not Programmed -A
P0604 PCM RAM Performance -A
P0606 PCM Internal Communication Interrupted -A
P0608 VSS Output Circuit -C
P0650 MIL Control Circuit -B (No Mil)
P0654 Engine Speed Output Circuit -C
P0704 Clutch Switch Circuit(M/T) -B
P0705 Transmission range Switch Circuit (A/T) -C
P0706 Transmission Range Switch Performance (A/T) -C
P0801 Reverse Inhibit Solenoid Control Circuit (M/T) -C
P0803 1-4 Upshift Solenoid Control Circuit (M/T) -B
P0804 1-4 Upshift lamp Control Circuit (M/T) -C
P1111 Intake Air temperature (IAT) Sensor Circuit Intermittent High Voltage -C
P1112 Intake Air temperature (IAT) Sensor Circuit Intermittent Low Voltage -C
P1114 ECT Sensor Circuit Intermittent Low Voltage -C
P1115 ECT Sensor Circuit Intermittent High Voltage -C
P1120 TP sensor 1 Circuit -A
P1125 APP System -A
P1133 Heated Oxygen Sensor (HO2S) Insufficient Switching Bank 1 Sensor 1 -B
P1134 Heated Oxygen Sensor (HO2S) Transition Time ratio Bank 1 Sensor 1 -B
P1153 Heated Oxygen Sensor (HO2S) Insufficient Switching Bank 2 Sensor 1 -B
P1154 Heated Oxygen Sensor (HO2S) Transition Time ratio Bank 2 Sensor 1 -B
P1220 TP sensor 2 Circuit -A
P1221 TP Sensors 1,2 Performance -A
P1258 Engine Coolant Over Temperature-Fuel disabled -A
P1275 APP sensor 1 Circuit -C
P1276 APP Sensor 1 Circuit Performance -C
P1280 APP sensor 2 Circuit -C
P1281 APP Sensor 2 Circuit Performance -C
P1285 APP sensor 3 Circuit -C
P1286 APP Sensor 3 Circuit Performance -C
P1380 EB(T)CM DTC Detected- rough road data Unusable -C
P1381 Misfire Detected - No EB(T)CM/PCM Serial data -V
P1415 AIR System bank 1 -B
P1416 AIR System bank 2 -B
P1431 Fuel Level Sensor 2 Circuit Performance -C
P1432 Fuel Level Sensor 2 Low Voltage -C
P1433 Fuel Level Sensor 2 High Voltage -C
P1441 Evaporative Emissions (EVAP) System Flow During Non-Purge -B
P1514 TAC System MAF Performance -A
P1515 Command vs Actual Throttle Position performance(PCM Module) -A
P1516 Command vs Actual Throttle Position performance(TAC Module) -A
P1517 TAC Module Processor -A
P1518 PCM to TAC Module Serial Data Circuit -A
P1539 A/C Clutch Status Circuit High Voltage -C
P1545 A/C Clutch Relay Control Circuit -C
P1546 A/C Clutch Status Circuit Low Voltage -C
P1571 ASR Desired Torque -C
P1574 Stop lamp Control Circuit -C
P1575 Extended Travel Brake Switch Circuit High Voltage -C
P1626 Theft Deterrent System Fuel enable Circuit -C
P1630 Theft Deterrent System PCM in Learn Mode -C
P1631 Theft Deterrent System password Incorrect -C
P1635 5 volt Reference #1 Circuit -B
P1639 5 volt Reference #2 Circuit -B
P1644 Delivered Torque Output Circuit -C
P1652 Powertrain Induced Chassis Pitch Output Circuit -C
28 TCS Traction Control system ABS on page 5-86
C1214 Sol Valve relay Contact or coil CKT Open
C1217 BPMV Pump Motor Relay Contact CKT Open
C1221 LF Wheel Speed Sensor Input Signal is 0
C1222 RF Wheel Speed Sensor Input Signal is 0
C1223 LR Wheel Speed Sensor Input Signal is 0
C1224 RR Wheel Speed Sensor Input Signal is 0
C1225 RF Excessive Wheel Speed Variation
C1226 LF Excessive Wheel Speed Variation
C1227 LR Excessive Wheel Speed Variation
C1228 RR Excessive Wheel Speed Variation
C1232 LF Wheel Speed Circuit Open or Shorted
C1233 RF Wheel Speed Circuit Open or Shorted
C1234 LR Wheel Speed Circuit Open or Shorted
C1235 RR Wheel Speed Circuit Open or Shorted
C1236 Low System Supply Voltage
C1237 High System Supply Voltage
C1241 Magna Steer Circuit Malfunction Refer to variable effort steering on Steering
C1242 BPMV Pump Motor Ground Circuit Open
C1243 BPMV Pump Motor Stalled
C1255 EBTCM Internal malfunction
CEBCM Internal Malfunction
C1261 LF Inlet Valve Solenoid Malfunction
C1262 LF Outlet Valve Solenoid Malfunction
C1263 RF Inlet Valve Solenoid Malfunction
C1264 RF Outlet Valve Solenoid Malfunction
C1265 LR Inlet Valve Solenoid Malfunction
C1266 LR Outlet Valve Solenoid Malfunction
C1267 RR Inlet Valve Solenoid Malfunction
C1268 RR Outlet Valve Solenoid Malfunction
C1273 RF TCS Master Cyl Isolation Valve malfunction
C1274 RF TCS Prime Valve malfunction
C1276 Delivered Torque Signal CKT malfunction
C1277 Requested Torque Signal CKT Malfunction
C1278 TCS Temporarily Inhibited by PCM
C1281 Steering Sensor Uncorrelated Malfunction
C1286 Steering Sensor Bias Malfunction
C1287 Steering sensor rate malfunction
C1291 Open brake lamp Sw Contacts During Deccel
C1293 DTC C1291/C1292 Set Curnt/Prev Ign Cylce
C1294 Brake Lamp Switch Circuit Always Active
C1295 Brake Lamp Switch Circuit Open
U1016 Loss of Communications with PCM
U1255 Generic Loss Communications
U1300 Class 2 Circuit Shorted to ground Refer to Data Link Connector System Check in Wiring Systems
U1301 Class 2 Circuit Shorted to battery Refer to Data Link Connector System Check in Wiring Systems
RTD Real Time damping page 3-136
C1650 ESC Module Malfunction
C1658 EEPROM calibration Malfunction
C1710 LF Shock Absorber Solenoid (Short to Voltage)
C1711 LF Shock Absorber Solenoid (Short to GND)
C1712 LF Shock Absorber Solenoid (Open Circuit)
C1715 RF Shock Absorber Solenoid (Short to Voltage)
C1716 RF Shock Absorber Solenoid (Short to GND)
C1717 RF Shock Absorber Solenoid (Open Circuit)
C1720 LR Shock Absorber Solenoid (Short to Voltage)
C1721 LR Shock Absorber Solenoid (Short to GND)
C1722 LR Shock Absorber Solenoid (Open Circuit)
C1725 RR Shock Absorber Solenoid (Short to Voltage)
C1726 RR Shock Absorber Solenoid (Short to GND)
C1727 RR Shock Absorber Solenoid (Open Circuit)
C1743 Loss Of Vehicle Speed Signal
C1760 LF Position Sensor(Out of range)
C1761 RF Position Sensor(Out of range)
C1762 LR Position Sensor(Out of range)
C1763 RR Position Sensor(Out of range)
C1768 Position Sensor Supply malfunction(Overcurrent)
C1780 Loss of Steering Position Signal
C1786 RTD Control Relay Malfunction
C1787 RTD Control Relay Circuit (Open or Short to GND)
C1788 RTD Control relay Circuit (Short to Voltage)
C1790 Ride control switch(out of range)
C1791 Ride control switch(contact malfunction
40 BCM Body Control Module page 8-405 UTD Page 8-727
B0432 Rear Defogger Relay Circuit
B0433 Rear Defogger Relay Circuit
B0502 RH DRL Relay Circuit
B0503 RH DRL Relay Circuit
B0507 LH DRL Relay Circuit
B0508 LH DRL Relay Circuit
B0605 BCM Internal Memory Function
B0844 BCM Temporarily Inhibit ABS
B2403 Front Fog lamp Switch Circuit
B2408 Rear Fog Lamp Switch Circuit
B2482 Backup Lamp Relay Circuit
B2483 Backup Lamp Relay Circuit
B2527 Horn Relay Circuit
B2528 Horn Relay Circuit
B2573 Hatch Release Switch Circuit(Short to Voltage)
B2578 RF Turn Signal Monitor Circuit (Short to Voltage)
B2583 LF Turn Signal Monitor Circuit (Short to Voltage)
B2587 Column Lock/Unlock Drive (A)
B2588 Column Lock/Unlock Drive (A)
B2592 Column Lock/Unlock Drive (B)
B2583 Column Lock/Unlock Drive (B)
B2597 Traction Control System Switch Circuit
B2721 PASS-Key Detection Circuit
B2722 PASS-Key Detection Circuit
B2723 PASS-Key Detection Circuit
B2735 PASS-Key Programming Mode Active
U1016 Loss of Communications with PCM
U1096 Loss of Communications with IPC
U1255 Serial Data Line malfunction
60 IPC Instrument Panel Cluster page 8-508
B0516 Speedometer Signal Circuit Malfunction
B0521 Tachometer Signal Circuit Malfunction
B1512 DIC Switch 1 Signal Short to GND "FUEL"
B1517 DIC Switch 2 Signal Short to GND "GAGES"
B1522 DIC Switch 3 Signal Short to GND "TRIP"
B1527 DIC Switch 4 Signal Short to GND "OPTIONS"
B1532 DIC Switch 5 Signal Short to GND "E/M"
B1537 DIC Switch 6 Signal Short to GND "RESET"
B1542 Oil Temperature Circuit Short to GND
B1543 Oil Temperature Circuit Open
U1016 Loss of Communications with PCM
U1040 Loss of Communications with TCS
U1056 Loss of Communications with RTD
U1064 Loss of Communications with BCM
U1128 Loss of Communications with radio
U1153 Loss of Communications with HVAC
U1160 Loss of Communications with LDCM
U1161 Loss of Communications with RDCM
U1166 Loss of Communications with SCM
U1176 Loss of Communications with RFA
U1255 Serial Data Line malfunction
80 radio none found page 8-213
99 HVAC Heater Vent-Air Conditioning page 1-118
B0332 Outside Air Temp sensor Short to GND
B0333 Outside Air temp sensor open
B0337 Inside Air temp Sensor Short to GND
B0338 Inside Air temp sensor open
B0348 Sunload temperature sensor open
B0361 Left Actuator Feedback short to GND
B0363 Left Actuator Feedback Open
B0365 Right Actuator Feedback short to GND
B0367 Right Actuator Feedback Open
B0441 Left Actuator Out of Range
B0446 Right Actuator Out of Range
B1016 Loss of Communications with PCM (No State of Health Message)
U1064 Loss of Communications with BCM (No State of Health Message)
U1096 Loss of Communications with IPC (No State of Health Message)
U1255 Serial Data Line malfunction
A0 LDCM Left Door Control module page 8-904 to 8-951
B2202 Left Window Up Switch Fault DCM-LEFT
B2204 Left Window Down Switch Fault DCM-LEFT
B2206 Right Window Up Switch Fault DCM LEFT
B2208 Right Window Down Switch Fault DCM-L
B2222 LT Mirror Select Switch Fault DCM-LEFT
B2224 RT Mirror Select Switch Fault DCM-LEFT
B2226 Mirror Right Switch Fault DCM-LEFT
B2228 Mirror Left Switch Fault DCM-LEFT
B2232 Mirror Up Switch Fault DCM-LEFT
B2234 Mirror Down Switch Fault DCM-LEFT
B2236 Left Door Lock Switch Fault DCM-LEFT
B2238 Left Door UnLock Switch Fault DCM-LEFT
B2242 Memory 1 Switch Fault DCM-LEFT
B2244 Memory 2 Switch Fault DCM-LEFT
B2252 Key Cylinder Switch Fault DCM-LEFT
B2262 Horizontal Position Sensor Fit DCM-L
B2264 Vertical Position Sensor Fault DCM-L
B2272 Left Mirror Motor Fault DCM-L
B2274 Window Motor Fault DCM-LEFT
B2276 Door Lock Motor/Mirror Heater Fit DCM-L
B2282 Battery #1 Fault DCM-LEFT
B2284 Battery #2 Fault DCM-LEFT
B2286 +5v Reference Fault DCM-LEFT
A1 RDCM Right Door Control Module page 8-904 to 8-951
B2203 Right Window Up Switch Fault DCM RIGHT
B2205 Right Window Down Switch Fault DCM-R
B2237 Right Door Lock Switch Fault DCM-RIGHT
B2239 Right Door Un-Lock Switch Fault DCM-RIGHT
B2253 Key Cylinder Switch Fault DCM-RIGHT
B2263 Horizontal Position Sensor Fit DCM-R
B2265 Horizontal Position Sensor Fault DCM-R
B2273 Right Mirror Motor Fault DCM-Right
B2275 Window Motor Fault DCM-Right
B2277 Door Lock Motor/Mirror Heater Fit DCM-R
B2283 Battery #1 Fault DCM-RIGHT
B2285 Battery #2 Fault DCM-RIGHT
B2287 +5v Reference Fault DCM-RIGHT
AC SCM Seat Control module page 8-1064 -8-1082
B0846 Battery 2 out of range
B0851 Battery 1 out of range
B2002 Fore/Aft Seat motor Open or Short to GND
B2007 Front Vert. Seat motor Open or Shorted
B2012 Rear Vert. Seat motor Open or Shorted
B2172 Seat Front Up Switch Shorted to GND
B2177 Seat Front Down Switch Shorted to GND
B2182 Seat Rear Up Switch Shorted to GND
B2187 Seat Rear Down Switch Shorted to GND
B2192 Seat Forward Switch Shorted to GND
B2197 Seat Reverse Switch Shorted to GND
B2605 Seat Front Vert. Position Sensor Failure
B2606 Seat Rear Vert. Position Sensor Failure
B2607 Seat Horizontal Position Sensor Failure
B0 RFA Remote Function Actuation page 8-676
B0605 Receiver Internal memory malfunction -RFA
B2805 No Transmitters Programmed -RFA
C2100 Left Front TPM Sensor Malfunction -TPM
C2105 Right Front TPM Sensor Malfunction -TPM
C2110 Right Rear TPM Sensor Malfunction -TPM
C2115 Left Rear TPM Sensor Malfunction -TPM
C2120 TPM System malfunction (No Sensors Received -TPM
C2121 TPM System Programming malfunction (No Sensors Programmed)-TPM
U1000 Loss of Communication Undetermined -RFA
U1016 Loss Of Communication with PCM (No SOH Message Received -RFA
U1064 Loss Of Communication with BCM (No SOH Message Received -RFA
U1096 Loss Of Communication with IPC (No SOH Message Received -RFA
U1255 Serial Data Line Malfunction -RFA