Ram 1500, 2500, 3500, 2WD and 4WD, 2001-2005

5.9L L6 VIN 6 Std 2

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Trouble Code: P0140



O2 (B1 S2) Remains At Center

Possible Causes:



Exhaust leak present in exhaust manifold or exhaust pipes
 
O2 element is fuel contaminated or has deteriorated
 
O2 signal circuit or ground circuit has high resistance
 
PCM has failed
 

Trouble Code: P0141



O2 (B1 S2) Heater Circuit

Possible Causes:



ASD relay output (power) circuit to the heater is open
 
O2 heater ground circuit open or O2 signal circuit is open
 
O2 heater element has high resistance
 
O2 heater element has failed (open or shorted)
 
PCM has failed
 

Trouble Code: P0143



O2 (B1 S3) Short to Ground

Possible Causes:



O2 signal circuit is open or is shorted to chassis or Sensor ground
 
O2 signal circuit is open (circuit reads 450 mV when open)
 
O2 may be contaminated or it has failed
 

Trouble Code: P0144



O2 (B1 S3) Short to Voltage

Possible Causes:



O2 signal tracking in connector due to a short between the signal and power circuits
 
O2 signal circuit shorted to system power
 
O2 signal circuit open, or ground circuit open
 
O2 heater supply circuit is open
 
PCM has failed
 

Trouble Code: P0145



O2 (B1 S3) Slow Response

Possible Causes:



Exhaust leak present in the exhaust manifold or exhaust pipes
 
O2 element is fuel contaminated or the O2 element is deteriorated
 
PCM has failed
 

Trouble Code: P0147



O2 (B1 S3) Heater Fault

Possible Causes:



ASD relay output (power) circuit to the heater is open
 
O2 heater ground circuit open or O2 signal circuit is open
 
O2 heater element has high resistance
 
O2 heater element has failed (open or shorted)
 
PCM has failed
 

Trouble Code: P0151



O2 (B2 S1) Circuit Short to Ground

Possible Causes:



O2 signal circuit is shorted to chassis or Sensor ground
 
O2 signal circuit is open (circuit reads 450 mV when open)
 
O2 ground circuit is open (circuit reads 170 mV when open)
 
O2 may be contaminated or it has failed
 
PCM has failed
 

Trouble Code: P0152



O2 (B2 S1) Short to Voltage

Possible Causes:



O2 signal tracking in connector due to wet/oily conditions
 
O2 ground circuit is open
 
O2 heater supply circuit is open
 
O2 signal circuit is open
 
O2 element is damaged or it has failed
 
PCM has failed
 

Trouble Code: P0153



O2 (B2 S1) Slow Response

Possible Causes:



Exhaust leak present in the exhaust manifold or exhaust pipes
 
O2 signal or ground circuit has a high resistance condition
 
O2 element is fuel contaminated
 
O2 element is deteriorated or it has failed
 

Trouble Code: P0154



O2 (B2 S1) Remains At Center

Possible Causes:



Exhaust leak present in the exhaust manifold or exhaust pipes
 
O2 signal or ground circuit has a high resistance condition
 
O2 element is fuel contaminated
 
O2 element is deteriorated or it has failed
 

Trouble Code: P0155



O2 (B2 S1) Heater Circuit

Possible Causes:



ASD relay output (power) circuit to the heater is open
 
O2 heater ground circuit open or O2 signal circuit is open
 
O2 heater element has high resistance
 
O2 heater element has failed (open or shorted)
 
PCM has failed
 

Trouble Code: P0157



O2 (B2 S2) Circuit Shorted to Ground

Possible Causes:



O2 signal circuit is shorted to chassis or Sensor ground
 
O2 may be contaminated or it has failed
 
PCM return or signal circuit is damaged or has failed
 

Trouble Code: P0158



O2 (B2 S2) Circuit Shorted to Ground

Possible Causes:



O2 signal tracking due to wet/oily condition in the connector
 
O2 signal circuit is open or shorted to system power
 
O2 is damaged or is has failed
 
PCM has failed
 

Trouble Code: P0159



O2 (B2 S2) Slow Response

Possible Causes:



Exhaust leak
 
O2 signal circuit is open or shorted
 
O2 downstream return circuit is open or shorted
 
O2 Sensor is damaged or has failed
 

Trouble Code: P0161



O2 (B2 S2) Slow Response

Possible Causes:



ASD relay output (power) circuit to the heater is open
 
O2 heater ground circuit is open or O2 signal circuit open
 
O2 heater element has high resistance, is open or shorted
 
PCM has failed
 

Trouble Code: P0165



Starter Relay Circuit

Possible Causes:



Starter Relay control circuit is open
 
Starter Relay Control circuit is grounded
 
PCM has failed
 

Trouble Code: P0168



Decreased Performance (High Injection Pump Fuel Temperature)

Possible Causes:



Fuel Injection pump module has failed
 
Overflow Valve Test failed
 

Trouble Code: P0171



Fuel System Lean (Bank 1)

Possible Causes:



Air leaks in intake manifold, exhaust pipes or exhaust manifold
 
Base engine mechanical problem causing a lean A/F condition
 
Fuel control Sensor is out of calibration (e.g., ECT, IAT or MAP)
 
Fuel delivery component fault (clogged filter, low fuel pressure)
 
O2 element is contaminated, deteriorated or it has failed
 
Vacuum hose is disconnected, broken, leaking or loose
 

Trouble Code: P0172



Fuel System Rich (Bank 1)

Possible Causes:



Base engine fault (i.e., cam timing incorrect, oil level too high)
 
EVAP vapor recovery system failure (e.g., canister full of fuel)
 
Fuel control Sensor is out of calibration (e.g., ECT, IAT or MAP)
 
Fuel delivery component fault (injector leak, high fuel pressure)
 
O2 element is contaminated, deteriorated or it has failed
 
O2 heater is damaged or it has failed
 

Trouble Code: P0174



Fuel System Lean (Bank 2)

Possible Causes:



Air leaks in intake manifold, exhaust pipes or exhaust manifold
 
Base engine mechanical problem causing a lean A/F condition
 
Fuel control Sensor is out of calibration (e.g., ECT, IAT or MAP)
 
Fuel delivery component fault (clogged filter, low fuel pressure)
 
O2 element is contaminated, deteriorated or it has failed
 
Vacuum hose is disconnected, broken, leaking or loose
 

Trouble Code: P0175



Fuel System Rich (Bank 2)

Possible Causes:



Base engine fault (i.e., cam timing incorrect, oil level too high)
 
EVAP vapor recovery system has failed (canister full of fuel)
 
Fuel injector (one or more) leaking or pressure regulator leaking
 
O2 element is deteriorated or has failed
 

Trouble Code: P0177



Water In Fuel Signal Circuit Fault

Possible Causes:



Water In Fuel Sensor has detected water in the fuel supply (drain the water from the fuel filter and then retest for the code)
 
Water In Fuel Sensor signal circuit shorted to Sensor ground
 
Water In Fuel Sensor signal circuit shorted to chassis ground
 
PCM has failed
 

Trouble Code: P0178



Water in Fuel Sensor Low Input

Possible Causes:



Water In Fuel Sensor signal circuit shorted to Sensor ground
 
Water In Fuel Sensor signal circuit shorted to chassis ground
 
Water In Fuel Sensor has failed
 
PCM has failed
 

Trouble Code: P0180



Fuel Injection Pump Temperature Out-Of-Range

Possible Causes:



Fuel injection pump has failed (this code is normally caused by an internal failure of the fuel injection pump)
 
PCM has failed
 

Trouble Code: P0181



Fuel Injection Pump Failure

Possible Causes:



Fuel Temperature Sensor has failed (this Sensor is not serviceable without replacing the VP44 pump controller unit).
 
Engine power is "de-rated" when this trouble code is set
 
PCM has failed
 

Trouble Code: P0196



Engine Oil Temperature Sensor Circuit Performance

Possible Causes:



Engine oil temp signal circuit is open or is shorted to ground or to battery voltage
 
Engine oil temp Sensor ground circuit is open
 
Engine oil temp signal circuit is shorted to Sensor ground
 
Engine oil temp Sensor has failed
 
PCM has failed
 

Trouble Code: P0197



Engine Oil Temperature Sensor Circuit Low

Possible Causes:



Engine oil temp signal circuit is shorted to ground
 
Engine oil temp signal circuit is shorted to Sensor ground
 
Engine oil temp Sensor has failed
 
PCM has failed
 

Trouble Code: P0198



Engine Oil Temperature Sensor Circuit High

Possible Causes:



Engine oil temp signal circuit is open or is shorted to battery voltage
 
Engine oil temp Sensor ground circuit is open
 
Engine oil temp Sensor has failed
 
PCM has failed
 

Trouble Code: P0201



Injector 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10 Control

Possible Causes:



Fuel injector 1-10 control circuit is open or grounded
 
Fuel injector 1-10 power circuit from the ASD relay is open
 
Fuel injector 1-10 has failed
 
PCM injector 1-10 driver has failed
 

Trouble Code: P0202



Injector 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10 Control

Possible Causes:



Fuel injector 1-10 control circuit is open or grounded
 
Fuel injector 1-10 power circuit from the ASD relay is open
 
Fuel injector 1-10 has failed
 
PCM injector 1-10 driver has failed
 

Trouble Code: P0203



Injector 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10 Control

Possible Causes:



Fuel injector 1-10 control circuit is open or grounded
 
Fuel injector 1-10 power circuit from the ASD relay is open
 
Fuel injector 1-10 has failed
 
PCM injector 1-10 driver has failed
 

Trouble Code: P0204



Injector 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10 Control

Possible Causes:



Fuel injector 1-10 control circuit is open or grounded
 
Fuel injector 1-10 power circuit from the ASD relay is open
 
Fuel injector 1-10 has failed
 
PCM injector 1-10 driver has failed
 

Trouble Code: P0205



Injector 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10 Control

Possible Causes:



Fuel injector 1-10 control circuit is open or grounded
 
Fuel injector 1-10 power circuit from the ASD relay is open
 
Fuel injector 1-10 has failed
 
PCM injector 1-10 driver has failed
 

Trouble Code: P0206



Injector 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10 Control

Possible Causes:



Fuel injector 1-10 control circuit is open or grounded
 
Fuel injector 1-10 power circuit from the ASD relay is open
 
Fuel injector 1-10 has failed
 
PCM injector 1-10 driver has failed
 

Trouble Code: P0207



Injector 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10 Control

Possible Causes:



Fuel injector 1-10 control circuit is open or grounded
 
Fuel injector 1-10 power circuit from the ASD relay is open
 
Fuel injector 1-10 has failed
 
PCM injector 1-10 driver has failed
 

Trouble Code: P0208



Injector 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10 Control

Possible Causes:



Fuel injector 1-10 control circuit is open or grounded
 
Fuel injector 1-10 power circuit from the ASD relay is open
 
Fuel injector 1-10 has failed
 
PCM injector 1-10 driver has failed
 

Trouble Code: P0209



Injector 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10 Control

Possible Causes:



Fuel injector 1-10 control circuit is open or grounded
 
Fuel injector 1-10 power circuit from the ASD relay is open
 
Fuel injector 1-10 has failed
 
PCM injector 1-10 driver has failed
 

Trouble Code: P0210



Injector 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10 Control

Possible Causes:



Fuel injector 1-10 control circuit is open or grounded
 
Fuel injector 1-10 power circuit from the ASD relay is open
 
Fuel injector 1-10 has failed
 
PCM injector 1-10 driver has failed
 

Trouble Code: P0215



Fuel Injection Pump Control Circuit

Possible Causes:



Fuel injection pump relay control circuit open, shorted to ground
 
Fuel injection pump relay ground circuit is open
 
Fuel injection pump relay has failed
 
Engine Control Module has failed
 

Trouble Code: P0216



Fuel Injection Pump Timing Failure

Possible Causes:



Fuel injection pump gear not aligned properly
 
Fuel filter plugged or restricted
 
Fuel injection pump is damaged
 
Transfer pump inlet line restricted
 

 
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