Code Question !!!!
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Code Question !!!!
Can anyone tell me what the following code means:
P1000 OBD system readiness test not complete.
I constantly hear a whining sound at idle and am wondering if this is related in any way. Thanks for the input.
P1000 OBD system readiness test not complete.
I constantly hear a whining sound at idle and am wondering if this is related in any way. Thanks for the input.
Postmaster
Joined: Aug 2003
Posts: 4,483
Likes: 2
From: Central Texas
It means there was a battery disconnect or some other code clearing activity.
Drive Cycles
OBD Drive Cycle
Description
The primary intention of the OBD Drive Cycle is to clear the DTC P1000 and to satisfy the specifications for SAE specification J1979. Each OBD monitor must run during the drive cycle.
If the drive cycle is completed and P1000 is not cleared, repeat the entire drive cycle. If a particular step is interrupted, simply repeat the drive mode. If the drive cycle is interrupted with a key-off, only drive modes that were incomplete must be run.
CAUTION: Strict observance of posted speed limits and attention to driving conditions are mandatory when proceeding through the drive cycle.
Rough road conditions may prevent certain steady state conditions and steady accelerations from validating the transmission- and load-related monitors.
Vehicles equipped with Power Take-Off (PTO) must have that system disengaged before the OBD drive cycle is initiated.
Drive Cycle Procedure:
Key on. Do not crank until the WAIT TO START light cycles, or at least 10 seconds, whichever is greater.
Start the engine. Idle in PARK or NEUTRAL for 40 seconds.
The following outlines the appropriate conditions for running certain OBD monitors that require the engine to be under load:
Accelerate steadily to third gear (M/T use fourth gear) and hold at 1500 rpm for 3 seconds. Accelerate steadily from 35 mph to 65 mph over approximately 15 seconds (M/T 11 seconds minimum).
Repeat Step 3a three times while maintaining the conditions in Step 3a.
Before proceeding, turn all accessories off and disengage tow/haul.
Before continuing, EOT must exceed 60°C (140°F).
Idle the vehicle for 20 seconds in PARK or NEUTRAL.
Key off.
Start the engine. Idle in PARK or NEUTRAL for 40 seconds.
Rerun Quick Test.
Note: If P1000 is present after running the drive cycle:
Rerun Step 3a, being certain to maintain a minimum MFDES of 35 mg/stroke above 2,000 rpm for 11 seconds. Also, maintain a minimum MFDES of 30 mg/stroke above 2,800 rpm for at least 6 seconds.
Rerun Step 8. MFDES must remain below 12 mg/stroke for 11 consecutive seconds.
Drive Cycles
OBD Drive Cycle
Description
The primary intention of the OBD Drive Cycle is to clear the DTC P1000 and to satisfy the specifications for SAE specification J1979. Each OBD monitor must run during the drive cycle.
If the drive cycle is completed and P1000 is not cleared, repeat the entire drive cycle. If a particular step is interrupted, simply repeat the drive mode. If the drive cycle is interrupted with a key-off, only drive modes that were incomplete must be run.
CAUTION: Strict observance of posted speed limits and attention to driving conditions are mandatory when proceeding through the drive cycle.
Rough road conditions may prevent certain steady state conditions and steady accelerations from validating the transmission- and load-related monitors.
Vehicles equipped with Power Take-Off (PTO) must have that system disengaged before the OBD drive cycle is initiated.
Drive Cycle Procedure:
Key on. Do not crank until the WAIT TO START light cycles, or at least 10 seconds, whichever is greater.
Start the engine. Idle in PARK or NEUTRAL for 40 seconds.
The following outlines the appropriate conditions for running certain OBD monitors that require the engine to be under load:
Accelerate steadily to third gear (M/T use fourth gear) and hold at 1500 rpm for 3 seconds. Accelerate steadily from 35 mph to 65 mph over approximately 15 seconds (M/T 11 seconds minimum).
Repeat Step 3a three times while maintaining the conditions in Step 3a.
Before proceeding, turn all accessories off and disengage tow/haul.
Before continuing, EOT must exceed 60°C (140°F).
Idle the vehicle for 20 seconds in PARK or NEUTRAL.
Key off.
Start the engine. Idle in PARK or NEUTRAL for 40 seconds.
Rerun Quick Test.
Note: If P1000 is present after running the drive cycle:
Rerun Step 3a, being certain to maintain a minimum MFDES of 35 mg/stroke above 2,000 rpm for 11 seconds. Also, maintain a minimum MFDES of 30 mg/stroke above 2,800 rpm for at least 6 seconds.
Rerun Step 8. MFDES must remain below 12 mg/stroke for 11 consecutive seconds.
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