DeVille, Eldorado, Seville 1999-2005

4.6L V8 VIN Y Auto 4

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Trouble Code: P0604



Control Module Random Access Memory Failure

Possible Causes:



The PCM must be replaced to correct this problem. A new PCM must be programmed with the correct software/calibration.
 

Trouble Code: P0606



Control Module Internal Performance

Possible Causes:



The PCM must be replaced to correct this problem. A new PCM must be programmed with the correct software/calibration.
 

Trouble Code: P0607



Control Module Performance

Possible Causes:



The PCM must be replaced to correct this problem. A new PCM must be programmed with the correct software/calibration.
 

Trouble Code: P0615



Starter Relay Control Circuit Malfunction

Possible Causes:



Starter relay control circuit is open or shorted to ground
 
Starter relay control circuit is shorted to system power (B+)
 
Starter relay is damaged or has failed
 
PCM has failed
 

Trouble Code: P0621



Generator 'L' Terminal Circuit Malfunction

Possible Causes:



Generator 'L' terminal circuit is shorted to system power (B+)
 
Generator is damaged or has failed
 
PCM has failed
 

Trouble Code: P0622



Generator 'F' Terminal Circuit Malfunction

Possible Causes:



Generator 'L' terminal circuit is shorted to ground
 
Generator 'F' terminal is open or shorted to ground
 
Generator is damaged or has failed
 
PCM has failed
 

Trouble Code: P0650



Malfunction Indicator Lamp Circuit Malfunction

Possible Causes:



MIL control circuit is open, shorted to ground or shorted to system power
 
MIL control power circuit is open in the Instrument Cluster
 
MIL (the lamp) is damaged or has failed
 
Instrument Cluster or the PCM has failed
 

Trouble Code: P0705



Transaxle Range Switch (PRNDL) Circuit Malfunction

Possible Causes:



TR switch circuit(s) is open or shorted to ground
 
TR switch circuit(s) is shorted to system power (B+)
 
TR switch is damaged or out of adjustment
 
PCM has failed
 

Trouble Code: P0711



TFT Sensor Signal Range/Performance (4L80-E)

Possible Causes:



ATF fluid level too low or the fluid is contaminated or burnt
 
TFT sensor is contaminated, damaged or "skewed"
 
PCM has failed
 

Trouble Code: P0712



TFT Sensor Circuit Low Input (4L80-E)

Possible Causes:



TFT sensor connector is damaged or shorted
 
TFT sensor signal circuit is shorted to sensor or chassis ground
 
TFT sensor is damaged or has failed (it may be shorted)
 
PCM has failed
 

Trouble Code: P0713



TFT Sensor Signal High Input (4L80-E)

Possible Causes:



TFT sensor signal circuit is open between the sensor and PCM
 
TFT sensor signal circuit is shorted to VREF or system power
 
TFT sensor is damaged or has failed (it may be open)
 
PCM has failed
 

Trouble Code: P0716



A/T Input Speed Sensor Circuit Malfunction (4L80-E)

Possible Causes:



ISS positive (+) or negative (-) circuit is open, shorted to ground or to power
 
ISS is damaged or has failed
 
PCM has failed
 
TSB 77-71-72 contains a repair procedure for this code
 

Trouble Code: P0717



A/T Input Shaft Speed Sensor Low Input (4T65-E, 4L80-E)

Possible Causes:



ISS positive (+) circuit is open, shorted to ground or to power
 
ISS negative (-) circuit is open, shorted to ground or to power
 
ISS is damaged or has failed
 
PCM has failed
 
TSB 77-71-72 contains a repair procedure for this code
 

Trouble Code: P0719



TCC Brake Switch Circuit Low Input (4L80-E)

Possible Causes:



TCC brake switch circuit is open or shorted to ground
 
TCC brake switch power circuit is open (check the CRUISE, FAN ALT or other related fuse in underhood junction block)
 
TCC brake switch is out of adjustment or damaged
 
PCM has failed
 

Trouble Code: P0724



TCC Brake Switch Circuit Low Input (4L80-E)

Possible Causes:



Check for ABS trouble codes (they can cause this code to set)
 
TCC brake switch circuit is shorted to system power
 
TCC brake switch is out of adjustment or damaged
 
PCM has failed
 

Trouble Code: P0730



Incorrect Gear Ratio (4L80-E)

Possible Causes:



ATF level is too low, or the fluid is burnt or contaminated
 
ISS or OSS signal circuit has an intermittent fault condition
 
Inspect for debris in the transmission pan or internal damaged
 
Possible vehicle overloading, exceeding the trailer towing limit, or towing in overdrive events occurred (discuss with customer)
 

Trouble Code: P0731



Incorrect 1st Gear Ratio (4L80-E)

Possible Causes:



ATF level is too low, or the fluid is burnt or contaminated
 
ISS or OSS signal circuit has an intermittent fault condition
 
Inspect for debris in transmission pan or a sticking shift valve
 
Possible vehicle overloading, exceeding the trailer towing limit, or towing in overdrive events occurred (discuss with customer)
 
TSB 01-07-30-009B contains a repair procedure for this code
 

Trouble Code: P0732



Incorrect 2nd Gear Ratio (4L80-E)

Possible Causes:



ATF level is too low, or the fluid is burnt or contaminated
 
ISS or OSS signal circuit has an intermittent fault condition
 
Inspect for debris in transmission pan or a sticking shift valve
 
Possible vehicle overloading, exceeding the trailer towing limit, or towing in overdrive events occurred (discuss with customer)
 
TSB 01-07-30-009B contains a repair procedure for this code
 

Trouble Code: P0733



Incorrect 3rd Gear Ratio (4L80-E)

Possible Causes:



ATF level is too low, or the fluid is burnt or contaminated
 
ISS or OSS signal circuit has an intermittent fault condition
 
Inspect for debris in transmission pan or a sticking shift valve
 
Possible vehicle overloading, exceeding the trailer towing limit, or towing in overdrive events occurred (discuss with customer)
 

Trouble Code: P0734



Incorrect 4th Gear Ratio (4L80-E)

Possible Causes:



ATF level is too low, or the fluid is burnt or contaminated
 
ISS or OSS signal circuit has an intermittent fault condition
 
Inspect for debris in transmission pan or a sticking shift valve
 
Possible vehicle overloading, exceeding the trailer towing limit, or towing in overdrive events occurred (discuss with customer)
 

Trouble Code: P0741



TCC System Stuck Off - Mechanical (4L80-E)

Possible Causes:



ATF level is too low, or the fluid is burnt or contaminated
 
Inspect transmission lines to radiator for bends or restrictions
 
Oil pressure screen is clogged or debris in the oil pan
 
TCC control valve is stuck "off" due to sediment or binding
 
TCC regulator valve is stuck "off" due to sediment or binding
 
TCC feed valve is stuck "off" due to sediment or binding
 
TCC solenoid valve O-ring or turbine shaft seals leaking or cut
 

Trouble Code: P0742



TCC System Stuck On - Mechanical (4L80-E)

Possible Causes:



TCC PWM solenoid valve is stuck "on" due to sediment
 
TCC converter feed limit valve is stuck "on" due to sediment
 
TCC fluid circuits leaking or abnormally low/high line pressure
 

Trouble Code: P0748



Pressure Control Solenoid Circuit Malfunction (4L80-E)

Possible Causes:



PC solenoid connector is damaged, open or shorted
 
PC solenoid control circuit is open or shorted to ground
 
Pressure control solenoid is damaged or it has failed
 
PCM has failed
 

Trouble Code: P0751



A/T 1-2 Shift Solenoid - No 1st or 4th Gear (4L80-E)

Possible Causes:



A/T 1-2 Shift Solenoid valve is stuck
 
A/T 1-2 Shift Valve is stick "off"
 
ATF is burnt or contaminated
 
A/T fluid circuits are plugged or restricted
 
Transmission has failed
 

Trouble Code: P0752



A/T 1-2 Shift Solenoid - No 2nd or 3rd Gear (4L80-E)

Possible Causes:



ATF is burnt or contaminated
 
Transmission has plugged or restricted fluid circuits
 
Shift solenoid valve seals are leaking or damaged
 
Transmission has failed
 

Trouble Code: P0756



A/T 2-3 Shift Solenoid - No 2nd or 3rd Gear (4L80-E)

Possible Causes:



ATF is burnt or contaminated
 
Transmission has plugged or restricted fluid circuits
 
Shift solenoid valve seals are leaking or damaged
 
Transmission has failed
 

Trouble Code: P0757



2-3 Shift Solenoid - No 3rd Or 4th Gear (4L60-E, 4L80-E)

Possible Causes:



ATF is burnt or contaminated
 
Transmission has plugged or restricted fluid circuits
 
Shift solenoid valve seals are leaking or damaged, or the Transmission has failed
 

Trouble Code: P1031



HO2S Heater Current Monitor Control (Bank 1 Sensor 1)

Possible Causes:



HO2S heater current monitor low or high circuit is open
 
HO2S heater current monitor low or high circuit shorted to B+
 
HO2S heater is damaged or has failed
 
PCM has failed
 

Trouble Code: P1032



HO2S Heater Current Monitor Control (Bank 2 Sensor 1)

Possible Causes:



HO2S heater current monitor low or high circuit is open
 
HO2S heater current monitor low or high circuit shorted to B+
 
HO2S heater is damaged or has failed
 
PCM has failed
 

Trouble Code: P1106



MAP Sensor Circuit Intermittent High Input

Possible Causes:



MAP sensor signal circuit is shorted to VREF (intermittent fault)
 
MAP sensor ground circuit is open (intermittent fault)
 
MAP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P1107



MAP Sensor Circuit Intermittent Low Input

Possible Causes:



MAP sensor signal circuit shorted to ground (intermittent fault)
 
MAP sensor VREF circuit is open (intermittent fault)
 
MAP sensor is damaged or has failed (intermittent fault)
 
PCM has failed
 

Trouble Code: P1111



IAT Sensor Circuit Intermittent High Input

Possible Causes:



IAT sensor signal circuit is open (intermittent fault)
 
IAT sensor ground circuit is open (intermittent fault)
 
IAT sensor is damaged (an intermittent "open" condition)
 
PCM has failed
 

Trouble Code: P1112



IAT Sensor Circuit Intermittent Low Input

Possible Causes:



IAT sensor signal circuit is shorted to ground (intermittent fault)
 
IAT sensor is damaged (an intermittent "shorted" condition)
 
PCM has failed
 

Trouble Code: P1114



ECT Sensor Circuit Intermittent Low Input

Possible Causes:



ECT sensor signal circuit shorted to ground (intermittent fault)
 
ECT sensor has failed (possible intermittent shorted condition)
 
PCM has failed
 

Trouble Code: P1115



ECT Sensor Circuit Intermittent High Input

Possible Causes:



ECT sensor signal circuit is open between the sensor and PCM
 
ECT sensor ground circuit is open between sensor and PCM
 
ECT sensor has failed (possible intermittent "open" condition)
 
PCM has failed
 

Trouble Code: P1121



TP Sensor Circuit High Input (Intermittent)

Possible Causes:



TP sensor signal circuit is shorted to VREF (intermittent fault)
 
TP sensor ground circuit is open (an intermittent fault)
 
TP sensor is damaged or has failed (possible intermittent open)
 
PCM has failed
 

Trouble Code: P1122



TP Sensor Circuit Intermittent Low Input

Possible Causes:



TP sensor signal circuit is shorted to ground (intermittent fault)
 
TP sensor VREF circuit is open or grounded (intermittent fault)
 
TP sensor is damaged or has failed (possible intermittent short)
 
PCM has failed
 

Trouble Code: P1133



HO2S-11 (Bank 1 Sensor 1) Insufficient Switching

Possible Causes:



Air leaks present in the exhaust manifold or the exhaust pipes
 
Fuel pressure is too high (i.e., causing a rich air fuel mixture)
 
HO2S may be contaminated (due to improper fuel or silicone)
 
HO2S signal high or low reference circuit has high resistance
 
HO2S heater element has failed, or the heater circuit is open
 
PCM has failed
 

Trouble Code: P1134



HO2S-11 (Bank 1 Sensor 1) Transition Time Ratio

Possible Causes:



Air leaks present in the exhaust manifold or the exhaust pipes
 
HO2S may be contaminated (due to improper fuel or silicone)
 
HO2S signal low reference circuit has high resistance
 
HO2S heater element has failed, or the heater circuit is open
 
PCM has failed
 

Trouble Code: P1153



HO2S-21 (Bank 2 Sensor 1) Insufficient Switching

Possible Causes:



Air leaks present in the exhaust manifold or the exhaust pipes
 
Fuel pressure is too high (i.e., causing a rich air fuel mixture)
 
HO2S may be contaminated (due to improper fuel or silicone)
 
HO2S signal high or low reference circuit has high resistance
 
HO2S heater element has failed, or the heater circuit is open
 
MAP sensor or TP sensor is out-of-calibration or "skewed"
 
PCM has failed
 

 
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