Ok... more codes...

G'day All,

Alright... If you recall... a couple of weeks ago I had a code that came up as 4th gear incorrectly selected. I re-set and it does come back occasionally. No where to check fluid or anything.... so do I need a trans service? Any suggestions?

The main thing though... I do have codes 171 and 174, left bank lean and right bank lean. This will clear but as soon as you start driving... it will come right back.
What can I do to correct this?

Any help is appreciated.

Cheers,

Curly

2000 Holland & Holland (4.6)

I had the same codes about a year ago.......mass air flow sensor......trip to have the adaptive setting reset, fixed it. MAS are expensive. Good Luck

I agree with the previous post, a 4th gear code can mean MAF, but it can also mean filthy transmission fluid. If the fluid is clean and not burned, I personally would start with the MAF, but I can't think of a way to test it without putting in one that works and see if the code goes away. If you have a trusting friend with the same car you could "borrow" their to see if it solves the problem before you invest in a new one. Personally, I'm a fan of used parts, and I bet an ebay part would cost less than half of a new one. Anyway, the part is an easy swap so I say go for a used one first! Best of luck!

Oh, and for the second part. I can't remember specifically what those codes are, but I'm assuming they are OBD II codes and refer to the emissions system only. I believe they are related to the O2 sensors, but I'm not positive. I have shamelessly pirated the list below from another site, and the previous person who posted them claim they are from disco I's. Anyway, I'm not sure how much the exhaust management system has changed between the models, so for what it's worth here they are!



found these OBDII code for Disco I's (up to 1998's) on another forum, posted by a factory technican. Repost here for future reference.
__________________________________________________ _________

Trouble Code Chart
DTC
Fault Description
P0101
Mass Air Flow Sensor Signal Error Fault
P0102
Mass Air Flow Sensor Low out of Range Fault
P0103
Mass Air Flow Sensor High out of Range Fault
P0111
Air Temperature Signal Error Fault
P0112
Air Temperature Low out of Range Fault
P0113
Air Temperature High out of Range Fault
P0116
Engine Coolant Temperature Sensor Falling Temp Fault
P0117
Engine Coolant Temperature Sensor Low out of Range Fault
P0118
Engine Coolant Temperature Sensor High out of Range Fault
P0121
Throttle Position Sensor Output Signal Error Fault
P0122
Throttle Position Sensor Low out of Range Fault
P0123
Throttle Position Sensor High out of Range Fault
P0125
Engine Coolant Temp Sensor Warm Up Fault
P0130
Oxygen Sensor Cycle Fault *codes* A U
P0131
Oxygen Sensor Low Voltage *codes* A U
P0132
Oxygen Sensor High Voltage *codes* A U
P0133
Oxygen Sensor Slow response *codes* A U
P0136
Oxygen Sensor Cycle Fault *codes* A D
P0137
Oxygen Sensor Low Voltage *codes* A D
P0138
Oxygen Sensor High Voltage *codes* A D
P0139
Oxygen Sensor Slow response *codes* A D
P0150
Oxygen Sensor Cycle Fault *codes* B U
P0151
Oxygen Sensor Low Voltage *codes* BU
P0152
Oxygen Sensor High Voltage *codes* BU
P0153
Oxygen Sensor Slow response *codes* B U
P0156
Oxygen Sensor Cycle Fault *codes* B D
P0157
Oxygen Sensor Low Voltage *codes* BD
P0158
Oxygen Sensor High Voltage *codes* BD
P0159
Oxygen Sensor Slow response *codes* B D
P0171
Oxygen Sensor System Too Lean Fault Bank A
P0172
Oxygen Sensor System Too Rich Fault Bank A
P0174
Oxygen Sensor System Too Lean Fault Bank B
P0175
Oxygen Sensor System Too Rich Fault Bank B
P0181
Fuel Temperature Sensor Signal Error Fault
P0182
Fuel Temperature Sensor Low out of Range Fault
P0183
Fuel Temperature Sensor High out of Range Fault
P0201
Injector 1 Circuit Fault
P0202
Injector 2 Circuit Fault
P0203
Injector 3 Circuit Fault
P0204
Injector 4 Circuit Fault
P0205
Injector 5 Circuit Fault
P0206
Injector 6 Circuit Fault
P0207
Injector 7 Circuit Fault
P0208
Injector 8 Circuit Fault
P0300
Misfire on Multiple Cylinder
P0301
Misfire on Cylinder 1
P0302
Misfire on Cylinder 2
P0303
Misfire on Cylinder 3
P0304
Misfire on Cylinder 4
P0305
Misfire on Cylinder 5
P0306
Misfire on Cylinder 6
P0307
Misfire on Cylinder 7
P0308
Misfire on Cylinder 8
P0326
Continuous Knock Fault Bank A
P0327
Background Noise Low Fault Bank A
P0328
Background Noise High Fault Bank A
P0331
Continuous Knock Fault Bank B
P0332
Background Noise Low Fault Bank B
P0333
Background Noise High Fault Bank B
P0335
Crankshaft Position Sensor Signal Error Fault
P0336
Crankshaft Position Sensor Out of Range Fault
P0340
Camshaft Position Sensor Signal Error Fault
P0420
Catalyst Efficiency Low Fault Bank A
P0430
Catalyst Efficiency Low Fault Bank B
P0441
Evap. Purge Valve Incorrect Flow Fault
P0442
Evap System Small Leak Detected Fault
P0443
Evap. Purge Valve Open or Short Circuit Fault
P0451
Fuel Tank Pressure Sensor Signal Error Fault
P0452
Fuel Tank Pressure Sensor Low Out of Range Fault
P0453
Fuel Tank Pressure Sensor High Out of Range Fault
P0461
Fuel Tank Level Measurement Not Valid Fault
P0500
Vehicle Speed Sensor Signal Error Fault
P0506
Idle Speed Control Engine Speed Low Fault
P0507
Idle Speed Control Engine Speed High Fault
P0560
Battery Voltage Below minimum Fault
P0562
Measurement Circuit OK Battery Voltage Low Fault
P0563
Battery Voltage Above Maximum Fault
P0605
ECM Self Test Fault
P1130
Oxygen Sensor Fuel Trim at Limit *codes* A U
P1131
Oxygen Sensor Lean *codes* A U
P1132
Oxygen Sensor Rich *codes* A U
P1137
Oxygen Sensor Lean *codes* A D
P1138
Oxygen Sensor Rich *codes* A D
P1150
Oxygen Sensor Fuel Trim at Limit *codes* B U
P1151
Oxygen Sensor Lean *codes* B U
P1152
Oxygen Sensor Rich *codes* B U
P1157
Oxygen Sensor Lean *codes* B D
P1158
Oxygen Sensor Rich *codes* B D
P1171
Oxygen Sensor System too Lean Fault Banks A & B
P1172
Oxygen Sensor System too Rich Fault Banks A & B
P1176
Maximum Positive FMFR Correction Fault
P1177
Maximum Negative FMFR Correction Fault
P1178
Maximum Positive AMFR Correction Fault
P1179
Maximum Negative AMFR Correction Fault
P1185
Oxygen Sensor Heater Circuit Open Upstream
P1186
Oxygen Sensor Heater Circuit Short Upstream
P1187
Oxygen Sensor Heater Circuit Short Upstream
P1188
Oxygen Sensor Heater High Resistance Upstream
P1189
Oxygen Sensor Heater Type 1 Low Resistance Upstream
P1190
Oxygen Sensor Heater Type 2 Low Resistance Upstream
P1191
Oxygen Sensor Heater Circuit Open Downstream
P1192
Oxygen Sensor Heater Circuit Short Downstream
P1193
Oxygen Sensor Heater Circuit Open Downstream
P1194
Oxygen Sensor Heater High Resistance Downstream
P1195
Oxygen Sensor Heater Type 1 Low Resistance Downstream
P1196
Oxygen Sensor Heater Type 2 Low Resistance Downstream
P1199
Fuel Level Sensor Circuit Fault
P1201
Injector 1 Open Circuit or Ground Short Fault
P1202
Injector 2 Open Circuit or Ground Short Fault
P1203
Injector 3 Open Circuit or Ground Short Fault
P1204
Injector 4 Open Circuit or Ground Short Fault
P1205
Injector 5 Open Circuit or Ground Short Fault
P1206
Injector 6 Open Circuit or Ground Short Fault
P1207
Injector 7 Open Circuit or Ground Short Fault
P1208
Injector 8 Open Circuit or Ground Short Fault
P1313
Misfire Catalyst Damage Fault Bank A
P1314
Misfire Catalyst Damage Fault Bank B
P1315
Misfire Persistent Fault
P1316
Misfire Excessive Emissions Fault
P1317
ABS Rough Road Line Low Fault
P1318
ABS Rough Road Line High Fault
P1361
No Ignition Coil Activation Fault Coil 1
P1362
No Ignition Coil Activation Fault Coil 2
P1363
No Ignition Coil Activation Fault Coil 3
P1364
No Ignition Coil Activation Fault Coil 4
P1371
Early Ignition Coil Activation Fault Coil 1
P1372
Early Ignition Coil Activation Fault Coil 2
P1373
Early Ignition Coil Activation Fault Coil 3
P1374
Early Ignition Coil Activation Fault Coil 4
P1440
Evap System Purge Valve Stuck Open Fault
P1441
Evap System Purge Valve Flow 1 Fault
P1442
Evap System Purge Valve Blocked Fault
P1447
Evap System Purge Valve Open or Short Circuit Fault
P1448
Evap System Purge Valve Flow 2 Fault
P1508
Idle Speed Control Open Circuit Fault
P1509
Idle Speed Control Short Circuit Fault
P1514
Neutral Drive Load Fault
P1516
Neutral Drive Gear Change Fault
P1517
Neutral Drive Cranking Fault
P1607
Malfunction Indicator Lamp Short Circuit Fault
P1608
Malfunction Indicator Lamp Open Circuit Fault
P1620
Reprogramming Code Learn Fault
P1621
Serial Data Link Dead Fault
P1622
Repeated Wrong ECM Security Code Fault
P1623
ECM Security Code Fault