CEL codes.....need help with what they mean!!!

[kneehead]

Ok my service engine light came on and I bought it to get checked and the codes thats I got are P0051 and P1168.Can someone assist me with what they mean and suggest I should do to fix it.Thanks

[kneehead]

ANYBODY??

[redls1]

Well if you bought something to read the codes it should come with a book to tell you what they are. Also autozone will read and tell you what the codes mean. Another option is try a google search and see what you come up with. You dont sya what year your car is but a quick google came up with this P1168 (A/F Sensor Closed Loop Control) for a 2004



Here is a list of the error codes for the 5th Generation Maxima (USA) and their descriptions:

P0011 - IVT Control (Bank 1)
P0021 - IVT Control (Bank 2)
P0031 - Heated Oxygen Sensor 1 Heater Low Voltage (Bank 1)
P0032 - Heated Oxygen Sensor 1 Heater Low Voltage (Bank 2)
P0037 - Heated Oxygen Sensor 2 Heater Low Voltage (Bank 1)
P0038 - Heated Oxygen Sensor 2 Heater Low Voltage (Bank 2)
P0051 - Heated Oxygen Sensor 1 Heater High Voltage (Bank 1)
P0052 - Heated Oxygen Sensor 1 Heater High Voltage (Bank 2)
P0057 - Heated Oxygen Sensor 2 Heater High Voltage (Bank 1)
P0058 - Heated Oxygen Sensor 2 Heater High Voltage (Bank 2)
P0100 - Mass Air Flow Sensor
P0101 - Mass Air Flow Sensor Circuit Range / Performance Problem
P0102 - Mass Air Flow Sensor Circuit Low Input
P0103 - Mass Air Flow Sensor Circuit High Input
P0105 - Absolute Pressure Sensor
P0107 - Absolute Pressor Sensor Circuit Low Input
P0108 - Absolute Pressor Sensor High Input
P0110 - Intake Air Temperature Sensor
P0112 - Intake Air Temperature Sensor Circuit Low Input
P0113 - Intake Air Temperature Sensor Circuit High Input
P0115 - Engine Coolant Temperature Sensor Circuit
P0117 - Engine Coolant Temperature Sensor Circuit Low Input
P0118 - Engine Coolant Temperature Sensor Circuit High Input
P0120 - Throttle Position Sensor
P0122 - Throttle Position Sensor 2 Circuit Low Input
P0123 - Throttle Position Sensor 2 Circuit High Input
P0125 - Insufficient Engine Coolant Temperature For Closed Loop Fuel Control
P0127 - Intake Air Temperature Too High
P0128 - Thermostat Malfunction
P0130 - Front O2 Sensor Circuit (Bank 1)
P0131 - Front O2 Sensor (Lean) (Bank 1)
P0132 - Heated Oxygen Sensor 1 Circuit High Voltage (Bank 1)
P0133 - Heated Oxygen Sensor 1 Circuit Slow Response (Bank 1)
P0134 - (2000-2001) Front O2 Sensor High Input (Bank 1)
P0134 - (2002-2003) Heated Oxygen Sensor 1 Circuit No Activity Detected (Bank 1)
P0135 - Front O2 Sensor Heater (Bank 1)
P0137 - Rear O2 Sensor Low Input (Bank 1)
P0138 - Heated Oxygen Sensor 2 Circuit High Voltage (Bank 1)
P0139 - Heated Oxygen Sensor 2 Circuit Slow Response (Bank 1)
P0140 - Rear O2 Sensor High Input (Bank 1)
P0141 - Rear O2 Sensor Heater (Bank 1)
P0150 - Front O2 Sensor Circuit (Bank 2)
P0151 - Front O2 Sensor (Lean) (Bank 2)
P0152 - Heated Oxygen Sensor 1 Circuit High Voltage (Bank 2)
P0153 - Heated Oxygen Sensor 1 Circuit Slow Response (Bank 2)
P0154 - (2000-2001) Front O2 Sensor High Input (Bank 2)
P0154 - (2002-2003) Heated Oxygen Sensor 1 Circuit No Activity Detected (Bank 2)
P0155 - Front O2 Sensor Heater (Bank 2)
P0157 - Rear O2 Sensor Low Input (Bank 2)
P0158 - Heated Oxygen Sensor 2 Circuit High Voltage (Bank 2)
P0159 - Heated Oxygen Sensor 2 Circuit Slow Response (Bank 2)
P0160 - Rear O2 Sensor High Input (Bank 2)]
P0161 - Rear O2 Sensor Heater (Bank 2)
P0171 - Fuel Injection System Too Lean (Bank 1)
P0172 - Fuel Injection System Too Rich (Bank 1)
P0174 - Fuel Injection System Too Lean (Bank 2)
P0175 - Fuel Injection System Too Rich (Bank 2)
P0180 - Fuel Tank Temperature Sensor
P0181 - Fuel Tank Temperature Sensor Circuit Range / Performance
P0182 - Fuel Tank Temperature Sensor Low Input
P0183 - Fuel Tank Temperature Sensor High Input
P0217 - Coolant Over Temperature Enrichment Protection
P0221 - Throttle Position Sensor Circuit Range / Performance Problem
P0222 - Throttle Position Sensor 1 Circuit Low Input
P0223 - Throttle Position Sensor 1 Circuit High Input
P0226 - Accelerator Pedal Position Sensor Circuit Range / Performance Problem
P0227 - Accelerator Pedal Position Sensor 1 Circuit Low Input
P0228 - Accelerator Pedal Position Sensor 1 Circuit High Input
P0300 - Multiple Cylinder Misfire Detected
P0301 - Cylinder 1 Misfired Detected
P0302 - Cylinder 2 Misfired Detected
P0303 - Cylinder 3 Misfired Detected
P0304 - Cylinder 4 Misfired Detected
P0305 - Cylinder 5 Misfired Detected
P0306 - Cylinder 6 Misfired Detected
P0325 - Knock Sensor
P0327 - Knock Sensor Circuit Low Input
P0328 - Knock Sensor Circuit High Input
P0335 - Crankshaft Position Sensor Circuit
P0340 - Camshaft Position Sensor (Phase) Circuit (Bank 1)
P0345 - Camshaft Position Sensor (Phase) Circuit (Bank 2)
P0400 - EGR Function (Close)
P0403 - EGR Volume Control Valve Circuit
P0420 - Catalyst System Efficiency Below Threshold (Bank 1)
P0430 - Catalyst System Efficiency Below Threshold (Bank 2)
P0440 - EVAP Control System Small Leak
P0441 - EVAP Control System Incorrect Purge Flow
P0442 - EVAP Control System Small Leak Detected (Negative Pressure)
P0443 - EVAP Canister Purge Volume Control Solenoid Valve Circuit
P0444 - EVAP Canister Purge Volume Control Solenoid Valve Circuit Open
P0445 - EVAP Canister Purge Volume Control Solenoid Valve Circuit Shorted
P0446 - EVAP Canister Vent Control Valve Circuit
P0447 - EVAP Canister Vent Control Valve Circuit Open
P0450 - EVAP Control System Pressure Sensor
P0452 - EVAP Control System Pressure Sensor Low Input
P0453 - EVAP Control System Pressure Sensor High Input
P0455 - EVAP Control System Gross Leak
P0456 - EVAP Emission Control System Very Small Leak (Negative Pressure Check)
P0460 - Fuel Level Sensor Circuit Noise
P0461 - Fuel Level Sensor Circuit Range / Performance
P0462 - Fuel Level Sensor Circuit Low Input
P0463 - Fuel Level Sensor Circuit High Input
P0464 - Fuel Level Sensor Circuit
P0500 - Vehicle Speed Sensor
P0505 - Idle Air Control Valve / Auxiliary Air Control Valve
P0506 - Idle Speed Control System RPM Lower Than Expected
P0507 - Idle Speed Control System RPM Higher Than Expected
P0510 - Closed Throttle Position Switch
P0550 - Power Steering Pressure Sensor Circuit
P0600 - A/T Communication Line
P0605 - Engine Control Module (ECM)
P0650 - Malfunction Indicator (MIL) Control Circuit
P1065 - ECM Power Supply Circuit
P1102 - Mass Air Flow Sensor Circuit Range / Performance Problem
P1121 - Electric Throttle Control Actuator
P1121 - ABS / TCS Control Unit Performance
P1122 - Electric Throttle Control Performance Problem
P1124 - Throttle Control Motor Relay Circuit Short
P1126 - (2000-2001) Thermostat Function
P1126 - (2002-2003) Throttle Control Motor Relay Circuit Open
P1128 - Throttle Control Motor Relay Circuit Short
P1130 - Swirl Control Valve Control Solenoid Valve
P1143 - Heated Oxygen Sensor 1 Lean Shift Monitoring (Bank 1)
P1144 - Heated Oxygen Sensor 1 Rich Shift Monitoring (Bank 1)
P1146 - Heated Oxygen Sensor 2 Minimum Voltage Monitoring (Bank 1)
P1147 - Heated Oxygen Sensor 2 Maximum Voltage Monitoring (Bank 1)
P1148 - Closed Loop Control (Bank 1)
P1163 - Heated Oxygen Sensor 1 Lean Shift Monitoring (Bank 2)
P1164 - Heated Oxygen Sensor 1 Rich Shift Monitoring (Bank 2)
P1165 - Swirl Control Valve Control Vacuum Check Switch
P1166 - Heated Oxygen Sensor 2 Minimum Voltage Monitoring (Bank 2)
P1167 - Heated Oxygen Sensor 2 Maximum Voltage Monitoring (Bank 2)
P1168 - Closed Loop Control (Bank 2)
P1211 - ABS/TCS Control Unit
P1212 - ABS / TCS Communication Line
P1217 - Engine Over Temperature
P1223 - Throttle Position Sensor 2 Circuit Low Input
P1224 - Throttle Position Sensor 2 Circuit High Input
P1225 - Closed Throttle Position Learning Performance Problem
P1226 - Closed Throttle Position Learning Performance Problem
P1227 - Accelerator Pedal Position Sensor 2 Circuit Low Input
P1228 - Accelerator Pedal Position Sensor 2 Circuit High Input
P1229 - Sensor Power Supply Circuit Short
P1320 - Ignition Signal
P1335 - Crankshaft Position Sensor (REF)
P1336 - Crankshaft Position Sensor (POS) (COG)
P1401 - EGR Temperature Sensor
P1402 - EGR Function (Open)
P1440 - EVAP Control System Small Leak
P1444 - EVAP Canister Purge Volume Control Solenoid Valve
P1446 - EVAP Canister Vent Control Valve Closed
P1447 - EVAP Emission Control System Purge Flow Monitoring
P1448 - EVAP Canister Vent Control Valve Open
P1456 - EVAP Emission Control System Very Small Leak (Positive Pressure Check)
P1464 - Fuel Level Sensor Circuit Ground Signal
P1490 - Vacuum Cut Valve Bypass Valve Circuit
P1491 - Vacuum Cut Valve Bypass Valve Circuit
P1564 - Automatic Speed Control Device Steering Switch
P1572 - Automatic Speed Control Device Brake Switch
P1574 - Automatic Speed Control Device Vehicle Speed Sensor
P1605 - A/T Diagnosis Communication Line
P1706 - Park / Neutral Position Switch
P1800 - VIAS Control Solenoid Valve Circuit Open
P1805 - Brake Switch
P2122 - Accelerator Pedal Position Sensor 1 Circuit Low Input
P2123 - Accelerator Pedal Position Sensor 1 Circuit High Input
P2127 - Accelerator Pedal Position Sensor 2 Circuit Low Input
P2128 - Accelerator Pedal Position Sensor 2 Circuit High Input
P2135 - Throttle Position Sensor Circuit Range / Performance Problem
P2138 - Accelerator Pedal Position Sensor Circuit Range / Performance Problem
U1000 - CAN Communication Line
U1001 - CAN Communication Line

p0051 is the o2 sensor.

[Lovemycar]

I don't see the other on the list?

[redls1]

P1168 - Closed Loop Control (Bank 2) o2 sensor

[po8pimp]

p0051= HO2S Heater Control Circuit Low (Bank 2, Sensor 1) for all other codes just type in here under OBD2 deffinitions http://www.equus.com/

[kneehead]

thanks guys,is it a certain 02 sensor or do I have to go and replace all of them??

[po8pimp]

if you are not mechanically inclined take the car to Midas and have them replace it. Their prices for 02 sensors are only a couple dollars more than what you would pay for them at like checkers and their service is guarenteed and prices are reasonable. If you are mechanically inclined check the service manual which you can get at www.nissanhelp.com and go through the troubleshooting for these codes. After you have looked at the service manual and if you have questions then don't hesitate to ask.

[po8pimp]

Ok so if you want to tackle this thing on your own than you might want to register for free with http://forums.maxima.org/6th-generat...nissanhelp.com, log in and go to "Knowledgebase>ServiceManuals>Maxima>2004" this manual works for all 6th gens except 07 and 08. If you have a 07/08 might want to try this anyways unless you have a service manual for those years. Either way download the "EC" Engine control manual. go to page EC-155 and start there. The code you gave us was P0051 which is a generic code for troubleshooting. The code P0057 should be followed but everything should be applied to sensor 1 on that bank vice sensor 2. After looking at the troubleshooting tips I would check the connector to that sensor and make sure there is no corrosion, if there is clean it up. If the connector is good and the wire is good, going to and from the connector, than I would take it to a professional to get it fixed. Nissan techs have the equipment to tell you exactly what the problem is. 120 for diagnostic and piece of mind. With a Consult-II they can pinpoint what part needs replaced. Once you find out let us know and it might be an easy fix or might be hard. ECM controls the heater by using different inputs from the Camshaft Position Sensor, Coolant temp, and MAF sensor. The two sensors are easy to replace. The coolant temp can be affected by many things but you will see the temp when the engine warms up. If it is where is should be than you are ok. So the other two sensors could be the issue as well as the 02 sensor. So now you have three sensors and the wiring and the ECU to troubleshoot.

[kneehead]

wow man thanks alot....you really helped me out and ive noticed that my outside temp always says negative and my heater only works at 90 degress and ac works at 60.Im gonne bring it to a shop to get fixed.Thanks alot bro

[NISMOMAX002]

So I would like to bounce off you fellow 6th gens how bad I probably messed mine up....

So I to prepare my car for a road trip, I did the sea foam to the intake manifold, oil and gas tank, performed an oil change and I also sprayed throttle body cleaner. An issue with the throttle body cleaner was that the butterfly valve wouldn't open when stepping on the gas. I used the plastic end of a screwdriver to hold it open while spraying.


4 days into the trip, the CEL came on. The code was about high revolution. After clearing it, it was all good.

That was 2 weeks ago. Today, the temperature read -22 and the CEL came back. I turned off the car and waited 15 minutes. When I turn the car back on, it says i have an empty tank with the low fuel light on, the CEL on and the AC on @ 75 degrees half-full blast. This code, P0463 (pd) read : fuel tank level. sensor circuit high input. Also, when I take the key out, the AC lights are still on.

I drove 10 minutes to my house where I put the stock airbox back on and disconnected the battery for 20 minutes. Car drove fine with no problems for 5 minutes until the door ajar icon was blinking but the info screen did not detect it. It went away on its own after another 5 minutes. Now everything seems back to normal. WTF?


1 -Were sensors or anything electrical tampered?
2 - If I clear the codes, why do they come back?


Any help is greatly appreciated.

[NISMOMAX002]

At a stop sign, my car would not accelerate. The engine was revving but the car was stationary. I look down and my gauges aren't working properly: 1) fuel tank reads empty 2) thermostat reads cold 3) odometer and speedometer are "dead"; 4) a/c is inoperable 5) car will not shift gears.

i had to move my car to the side of the road by removing the shift lock.

please help.

[po8pimp]

stop disconnecting the battery and get a code reader up to it. Pull the codes and check the list. There are a whole bag full of items that could be wrong. I am willing to bet the gas cap wasn't tightened completely, and you sprayed a connector or something. Can't really help without narrowing things down.

[NISMOMAX002]

U1001: undefined
P1574: undefined
U1006: undefined
P1612: undefined
P0462: fuel tank level sensor circuit low input
P0500: vehicle speed sensor

Engine started up fine last night. This morning, engine won't turn over. These codes were thrown. Any ideas?

[02pearlyWHITES]

P0340 - Camshaft Position Sensor (Phase) Circuit (Bank 1)............does anyone know if this is the sensor in the head in the front or rear of motor??

[po8pimp]

I believe that is the furthest one from you if you are standing in front of the vehicle. Nearest the firewall. right next to the Throttle body.

[02pearlyWHITES]

Originally Posted by po8pimp

I believe that is the furthest one from you if you are standing in front of the vehicle. Nearest the firewall. right next to the Throttle body.

thanks