Ridgeline 2007-2008

3.5L V6 VIN - Auto 4

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Trouble Code: P0842



Short in 2nd Clutch Transmission Fluid Pressure Switch Circuit, or 2nd Clutch Transmission Fluid Pressure Switch Stuck ON

Possible Causes:



Faulty 2nd clutch transmission fluid pressure switch
 
Poor connections and loose terminals at the 2nd clutch transmission fluid pressure switch and the PCM
 
OP2SW wire for an intermittent short to ground between the 2nd clutch transmission fluid pressure switch and the PCM
 
"Short" in the wire between PCM connector terminal and the 2nd clutch transmission fluid pressure switch
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P0843



Open in 2nd Clutch Transmission Fluid Pressure Switch Circuit, or 2nd Clutch Transmission Fluid Pressure Switch Stuck OFF

Possible Causes:



Faulty 2nd clutch transmission fluid pressure switch
 
Poor connections and loose terminals at the 2nd clutch transmission fluid pressure switch and the PCM.
 
"Open" circuit between PCM connector terminal and the 2nd clutch transmission fluid pressure switch
 
PCM needs to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P0847



Short in 3rd Clutch Transmission Fluid Pressure Switch Circuit, or 3rd Clutch Transmission Fluid Pressure Switch Stuck ON

Possible Causes:



Faulty 3rd clutch transmission fluid pressure switch
 
Poor connections and loose terminals at the 3rd clutch transmission fluid pressure switch and the PCM
 
"Short" circuit between PCM connector terminal and the 3rd clutch transmission fluid pressure switch
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P0848



Open in 3rd Clutch Transmission Fluid Pressure Switch Circuit, or 3rd Clutch Transmission Fluid Pressure Switch Stuck OFF

Possible Causes:



Faulty 3rd clutch transmission fluid pressure switch
 
Poor connections or loose terminals at the 3rd clutch transmission fluid pressure switch and the PCM
 
"Open" circuit between PCM connector terminal and the 3rd clutch transmission fluid pressure switch
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P0872



Short in 4th Clutch Transmission Fluid Pressure Switch Circuit, or 4th Clutch Transmission Fluid Pressure Switch Stuck ON

Possible Causes:



Faulty 4th clutch transmission fluid pressure switch
 
Check the OP4SW wire for an intermittent short to ground between the 4th clutch transmission fluid pressure switch and the PCM
 

Trouble Code: P0873



Open in 4th Clutch Transmission Fluid Pressure Switch Circuit, or 4th Clutch Transmission Fluid Pressure Switch Stuck OFF

Possible Causes:



Faulty 4th clutch transmission fluid pressure switch
 
Poor connections and loose terminals at the 4th clutch transmission fluid pressure switch and the PCM
 
"Open" in the wire between PCM connector terminal and the 4th clutch transmission fluid pressure switch
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P0962



Problem in A/T Clutch Pressure Control Solenoid Valve A Circuit

Possible Causes:



Poor connections and loose terminals at A/T clutch pressure control solenoid valve A and the PCM
 
Faulty A/T clutch pressure control solenoid valve A
 
"Open" circuit between A/T clutch pressure control solenoid valve A and ground, or poor ground
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P0963



Problem in A/T Clutch Pressure Control Solenoid Valve A

Possible Causes:



Poor connections and loose terminals at A/T clutch pressure control solenoid valve A and the PCM
 
"Open" circuit between A/T clutch pressure control solenoid valve A and ground, or poor ground
 
Faulty A/T clutch pressure control solenoid valve A
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P0966



Problem in A/T Clutch Pressure Control Solenoid Valve B Circuit

Possible Causes:



Poor connections and loose terminals at A/T clutch pressure control solenoid valve B and the PCM
 
"Open" or "Short" circuit between PCM connector terminal and A/T clutch pressure control solenoid valve B
 
"Open" circuit between A/T clutch pressure control solenoid valve B and ground, or poor ground
 
Faulty A/T clutch pressure control solenoid valve B
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P0967



Problem in A/T Clutch Pressure Control Solenoid Valve B

Possible Causes:



Poor connections and loose terminals at A/T clutch pressure control solenoid valve B and the PCM
 
"Open" circuit between A/T clutch pressure control solenoid valve C and ground, or poor ground
 
Faulty A/T clutch pressure control solenoid valve B
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P0970



Problem in A/T Clutch Pressure Control Solenoid Valve C Circuit

Possible Causes:



Poor connections and loose terminals at A/T clutch pressure control solenoid valve C and the PCM
 
"Open" or "Short" circuit between PCM connector terminal and A/T clutch pressure control solenoid valve C
 
"Open" circuit between A/T clutch pressure control solenoid valve C and ground, or poor ground
 
Faulty A/T clutch pressure control solenoid valve C
 
PCM needs to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P0971



Problem in A/T Clutch Pressure Control Solenoid Valve C

Possible Causes:



Poor connections and loose terminals at A/T clutch pressure control solenoid valve C and the PCM
 
"Open" in the wire between A/T clutch pressure control solenoid valve C and ground,, or poor ground
 
Faulty A/T clutch pressure control solenoid valve C
 
PCM needs to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P0973



Short in Shift Solenoid Valve A Circuit

Possible Causes:



Blown fuse
 
Poor connections and loose terminals at shift solenoid valve A and the PCM
 
SHA wire for an intermittent "Short" to ground between shift solenoid valve A and the PCM
 
"Short" circuit between PCM connector terminal and the shift solenoid harness connector
 
"Open" circuit between PCM connector terminals and ground, or poor ground
 
Faulty shift solenoid valve A or the shift solenoid harness
 
PCM needs to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P0974



Open in Shift Solenoid Valve A Circuit

Possible Causes:



Poor connections or loose terminals at shift solenoid valve A and the PCM
 
"Open" in the wire between PCM connector terminal and the shift solenoid harness connector
 
Faulty shift solenoid valve A or shift solenoid harness
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P0976



Short in Shift Solenoid Valve B Circuit

Possible Causes:



Blown fuse
 
Poor connections and loose terminals at shift solenoid valve B and the PCM
 
"Open" in the wires between PCM connector terminals and ground, or poor ground
 
SHB wire for an intermittent short to ground between shift solenoid valve B and the PCM
 
"Short" in the wire between PCM connector terminal and the shift solenoid harness connector
 
Faulty shift solenoid valve B or the shift solenoid harness
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P0977



Open in Shift Solenoid Valve B Circuit

Possible Causes:



Poor connections or loose terminals at shift solenoid valve B and the PCM
 
"Open" circuit between PCM connector terminal and the shift solenoid harness connector
 
Faulty shift solenoid valve B or shift solenoid harness
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P0979



Short in Shift Solenoid Valve C Circuit

Possible Causes:



Blown fuse
 
Poor connections and loose terminals at shift solenoid valve C and the PCM
 
SHC wire for an intermittent short to ground between shift solenoid valve C and the PCM
 
"Open cicuit between PCM connector terminal and the under-dash fuse/relay box via the main relay
 
"Open" circuit between PCM connector terminals and ground, or poor ground
 
"Short" circuit between PCM connector terminal and the shift solenoid harness connector
 
Faulty shift solenoid valve C or the shift solenoid harness
 
PCM needs to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P0980



Open in Shift Solenoid Valve C Circuit

Possible Causes:



Poor connections or loose terminals at shift solenoid valve C and the PCM
 
"Open" circuit between PCM connector terminal and the shift solenoid harness connector
 
Faulty shift solenoid valve C or shift solenoid harness
 
PCM needs to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P0982



Short in Shift Solenoid Valve D Circuit

Possible Causes:



Blown Fuse
 
Poor connections and loose terminals at shift solenoid valve D and the PCM. If the PCM
 
SHD wire for an intermittent short to ground between shift solenoid valve D and the PCM
 
"Open" in the wire between PCM connector terminal and the under-dash fuse/relay box
 
"Short" in the wire between PCM connector terminal and the shift solenoid harness connector
 
Faulty shift solenoid valve D or the shift solenoid harness
 
PCM needs to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P0983



Open in Shift Solenoid Valve D Circuit

Possible Causes:



Poor connections or loose terminals at shift solenoid valve D and the PCM
 
"Open" circuit between PCM connector terminal C9 and the shift solenoid harness connector
 
Faulty shift solenoid valve D or shift solenoid harness
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P1077



Intake Manifold Tuning (IMT) Valve Stuck in High RPM Position

Possible Causes:



Poor connections or loose terminals at the IMT actuator and the PCM
 
"Open" circuitbetween the PCM and the IMT actuator
 
Faulty IMT actuator
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P1078



Intake Manifold Tuning (IMT) Valve Stuck in Low RPM Position

Possible Causes:



Poor connections or loose terminals at the IMT actuator and the PCM
 
"Open" or "Short" circuit between the PCM and the IMT actuator
 
Faulty IMT actuator
 
PCM needs to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P1109



Barometric Pressure (BARO) Sensor Circuit Out of Range High

Possible Causes:



PCM needs to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P1116



Engine Coolant Temperature (ECT) Sensor 1 Circuit Range/Performance Problem

Possible Causes:



Poor connections or loose terminals at ECT sensor 1 and ECT sensor 2
 
Faulty ECT sensor 1
 
Faulty ECT sensor 2
 

Trouble Code: P1128



Manifold Absolute Pressure (MAP) Sensor Signal Lower Than Expected

Possible Causes:



Dirty air cleaner element
 
Poor connections or loose terminals at the MAP sensor and the PCM
 
Faulty MAP sensor
 

Trouble Code: P1129



Manifold Absolute Pressure (MAP) Sensor Signal Higher Than Expected

Possible Causes:



Vacuum leaks
 
Poor connections or loose terminals at the MAP sensor and the PCM
 
Faulty MAP sensor
 

Trouble Code: P1172



Rear Air/Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) Circuit Out of Range High

Possible Causes:



Poor connections or loose terminals at the A/F sensor (Sensor 1) and the PCM
 
Faulty A/F sensor (Sensor 1)
 

Trouble Code: P1174



Front Air/Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) Circuit Out of Range High

Possible Causes:



Poor connections or loose terminals at the A/F sensor (Sensor 1) and the PCM
 
Faulty A/F sensor (Sensor 1)
 

Trouble Code: P1297



Electrical Load Detector (ELD) Circuit Low Voltage

Possible Causes:



Poor connections or loose terminals at the ELD and the PCM
 
"Short" circuit between the PCM and the ELD
 
Faulty left side engine compartment wire harness
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P1298



Electrical Load Detector (ELD) Circuit High Voltage

Possible Causes:



Blown fuse
 
Poor connections or loose terminals at the ELD and the PCM
 
"Open" circuit between the fuse in the under-dash fuse/relay box and the ELD
 
"Open" in the wire between the ELD and ground
 
Faulty left side engine compartment wire harness
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P1454



Fuel Tank Pressure (FTP) Sensor Circuit Range/Performance Problem

Possible Causes:



Poor connections or loose terminals at the FTP sensor, the EVAP canister vent shut valve, and the PCM
 
Blockage in the EVAP canister, canister filter, vent hoses, and drain joint,
 
Blockage in the FTP sensor air tube or vent
 
Faulty FTP sensor
 
Faulty EVAP canister vent shut valve
 

Trouble Code: P1549



Charging System High Voltage

Possible Causes:



Poor connections or loose terminals at the alternator and the main under-hood fuse box
 
Faulty alternator
 

Trouble Code: P1658



Electronic Throttle Control System (ETCS) Control Relay ON Malfunction

Possible Causes:



Poor connections or loose terminals at the under-hood fuse/relay box (ETCS control relay) and the PCM
 
"Short" in the wire between the PCM and the under-hood fuse/relay box (ETCS control relay)
 
"Short" to power in the wire between the PCM and the under-hood fuse/relay box (ETCS control relay)
 
Faulty relay control module (under-hood fuse/relay box)
 
PCM needs to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P1659



Electronic Throttle Control System (ETCS) Control Relay OFF Malfunction

Possible Causes:



Blown fuse
 
Poor connections or loose terminals at the under-hood fuse/relay box (ETCS control relay) and the PCM
 
"Open" or "Short" in the wire between the PCM and the under-hood fuse/relay box
 
Faulty right side engine compartment wire harness
 
Faulty relay control module (under-hood fuse/relay box)
 
PCM needs to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P1683



Throttle Valve Default Position Spring Performance Problem

Possible Causes:



Poor connections or loose terminals at the throttle body and the PCM
 
Faulty throttle body
 

Trouble Code: P1684



Throttle Valve Return Spring Performance Problem

Possible Causes:



Poor connections or loose terminals at the throttle body and the PCM
 
Faulty throttle body
 

Trouble Code: P16BB



Alternator B Terminal Circuit Low Voltage

Possible Causes:



Faulty battery
 
Poor connections or loose terminals at the alternator and the main under-hood fuse box
 
"Open" circuit between the alternator and the main under-hood fuse box
 
Faulty alternator
 

Trouble Code: P16BC



Alternator FR Terminal Circuit/IGP Circuit Low Voltage

Possible Causes:



Blown fuse
 
Poor connections or loose terminals at the alternator connector
 
Poor alternator ground
 



Faulty alternator
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P16C0



PCM A/T Control System Incomplete Update

Possible Causes:



PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P1744



Problem in Shift Control System; Shift Valve E Stuck ON

Possible Causes:



Low or dirty transmission fluid
 



Faulty shift valve E in the main valve body, replace the main valve body
 
Faulty transmission
 

 
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