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4,977 Posts
Discussion Starter · #1 ·
TSB 07-3-4

02/19/07

HESITATION, MISS, ANTI-THEFT LAMP ON - DTC
B1601

FORD:
2005 Escape

MERCURY:
2005 Mariner

ISSUE
Some 2005 Escape and Mariner vehicles equipped with a 3.0L engine, may exhibit an intermittent concern of a hesitation or miss accompanied by the anti-theft lamp illuminating and diagnostic trouble code (DTC) B1601. This may be due to the spark plugs causing radio frequency (RF) interference with the powertrain control module (PCM).

ACTION
Follow the Service Procedure steps to correct the condition.

SERVICE PROCEDURE
1. Perform key on engine off (KOEO) self test.

2. If the only DTC present is B1601 (INCORRECT KEY CODE FROM IGNITION KEY TRANSPONDER) replace all six (6) spark plugs.

3. If any other DTC is present, the B1601 should be ignored and the other DTCs should be resolved first by following normal diagnostic procedures.

Parts Block
PART NUMBER
PART NAME
AGSF-32W-M1SPARK PLUG
OTHER APPLICABLE ARTICLES: 05-11-01

WARRANTY STATUS: Eligible Under Provisions Of New Vehicle Limited Warranty Coverage And Emissions Warranty Coverage
IMPORTANT:
Warranty coverage limits/policies are not altered by a TSB. Warranty coverage limits are determined by the identified causal part.

OPERATION
DESCRIPTION
TIME
070304A2005 Escape/Mariner 3.0L: Check For DTCs, Replace All Six Spark Plugs (Do Not Use With 12650D, 12405A, 9424A)
2.0 Hrs.​
DEALER CODING
BASIC PART NO.
CONDITION CODE
12405
D4​
 

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Discussion Starter · #2 ·
TSB: 01-025/07

2005 TRIBUTE 3.0L - HESITATION, MISS, ANTI-THEFT LAMP ON WITH DTC B1601

APPLICABLE MODEL(S)/VINS
2005 Tribute 3.0L

DESCRIPTION
Some vehicles may exhibit an intermittent hesitation or miss accompanied by the anti-theft lamp illuminating with DTC B1601 (Incorrect Key Code From Ignition Key Transponder) stored in memory. This may be due to the spark plugs causing radio frequency (RF) interference with the powertrain control module (PCM).

Customers having this concern should have their vehicle repaired using the following repair procedure.

REPAIR PROCEDURE
1. Verify customer concern.

2. Perform key on engine off (KOEO) self test.
^ If DTC B1601 is the only DTC present, replace all six (6) spark plugs.
^ If DTC B1601 is present along with other DTCs, resolve the other DTCs first following the normal diagnostic procedures found in the Workshop Manual.

3. Verify repair.

PART(S) INFORMATION
Part Number
Description
Qty.
ZZC2-18-110A​
Spark Plug​
6​
WARRANTY INFORMATION
Warranty Type
A​
Symptom Code
62​
Damage Code
9W​
Part Number Main Cause
ZZC2-18-110A​
Quantity
6​
Operation Number / Labor Hours:
YY467XRX / 1.1 Hrs​
NOTE:
^ This warranty information applies only to verified customer complaints on vehicles eligible for warranty repair. Refer to the Warranty Wizard for warranty term information.
^ Additional diagnostic time cannot be claimed for this repair.
 
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