I have a Volvo v70 2.4 petrol 2000 model with fault code 2101 runs really sluggish when cold gets better when warmed up but not 100% how can I remedy

Dennis Mulford

• 1055 Answers
• Posted on Mar 05, 2009

SOURCE: f150 floods when cold, runs sluggish when warm

at that many miles its do a timing set

SOURCE: from cold start engine warms to quater temp then

Does the Check Engine light come ON when this happens? Whenever the "Check Engine" light comes on, there is always a DTC (Diagnostic Trouble Code) stored in the ECM (Engine Control Module). You'll need an OBDII (On-Board-Diagnostics) scanner to retrieve any codes recorded/set in ECM. Otherwise, guesswork. I have MANY ideas that could send you on a wild goose chase. I strongly suspect EMS (Engine Management System) sensor beginning to malfunction as it warms up. First strong suspicion is the crank position sensor (CKP) - however,usually always sets a DTC (i.e., P0335, P0336). The next suspicion is the Engine Coolant Temperature sensor. The ECM uses this sensor's signal to adjust fuel, timing, engine RPM, etc based on engine temp. If malfunctioning at a particuar point during engine warm up, it could be telling the ECM the temperature is LOWER or HIGHER than it ACTUALLY is, resulting in the ECM to increase fuel (flood it) or give it LESS fuel (starve it). If this malfunction lasts long enough, the ECM will usually set a DTC for that sensor circuit, either a Range/Performance code, or a "LOW Input" or "HIGH Input" code.

SOURCE: VOLVO SEMI FAULT CODES 128, 334, 2 , AND 100 WHAT

P0128: 'Coolant Thermostat (Coolant Temperature below Thermostat Regulation Temperature)'
P0334: 'Crankshaft Position Sensor Circuit, Electrical fault'
P0002: ??
P0100: 'Mass Air Flow Circuit, Range/Performance'

The Mass air flow sensor creates all the other problems. This is a very common problem with S60 this old.

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Jim Hall

• 111 Answers
• Posted on Mar 17, 2010

SOURCE: 2000 beetle cold start rough idle until it warms

Could be the fast idle sensor check to see that the vacume line is hooked up properly.

SOURCE: volvo v70, rough running, fault codes p2172 p2101

The exact same set of codes have just come up on my car, the same car and year. Did you solve it? I am thinking cleaning the throttle body first, any help appreciated....